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2014 Chevrolet Impala

Owner reports · Recalls · Investigations

When problems were reported

Mileage at the reported incident

462 reports with mileage · 172 unknown

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Electrical System. Review the 221 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Steering. Review the 140 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Electronic Stability Control (esc). Review the 104 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

19 crash reports8 fire reports9 injury reports

Vehicle Speed Control complaints

31 reports
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62,200 miles · Apr 20, 2018
Electronic Stability Control (esc)Vehicle Speed Control

TODAY IS THE SECOND TIME IN 6 MONTHS THAT MY CAR HAS DONE THIS. 2014 CHEVY IMPALA 62,000 MILES, 4 CYLINDER. I WAS DRIVING ON THE HIGHWAY AT 65 MILES AN HOUR AND FIRST THE "SERVICE STABILITRAK" WARNING COMES UP. THEN THE "ENGINE POWER REDUCED" WARNING APPEARS. THE ENGINE WILL NOT GO ABOVE 20 MPH AT THIS POINT. THIS IS VERY DANG…

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TODAY IS THE SECOND TIME IN 6 MONTHS THAT MY CAR HAS DONE THIS. 2014 CHEVY IMPALA 62,000 MILES, 4 CYLINDER. I WAS DRIVING ON THE HIGHWAY AT 65 MILES AN HOUR AND FIRST THE "SERVICE STABILITRAK" WARNING COMES UP. THEN THE "ENGINE POWER REDUCED" WARNING APPEARS. THE ENGINE WILL NOT GO ABOVE 20 MPH AT THIS POINT. THIS IS VERY DANGEROUS ESPECIALLY IF YOU ARE ON THE HIGHWAY AT SPEEDS OF 65 AND SUDDENLY YOU HAVE NO POWER! I TOOK IT TO MY MECHANIC WHO COULD FIND NOTHING WRONG WITH THE CAR. HE TOLD ME TO PULL OVER AND SHUT THE CAR OFF AND RESTART IT. I DID THAT AND THE CHECK ENGINE LIGHT IS ON BUT I DID GET MY ENGINE POWER BACK. I'M TERRIFIED DRIVING THIS CAR. SOMEONE IS GOING TO GET KILLED IN THIS SITUATION. I READ ALL OVER THE INTERNET ABOUT THIS SAME PROBLEM AND NOTHING IS BEING DONE ABOUT IT. THIS SHOULD BE A RECALL!

NHTSA ODI #11089071

65,000 miles · Apr 10, 2018
Electrical SystemVehicle Speed Control

DRIVING TO WORK AND ALL THE EMERGENCY LIGHTS ON MY DASHBOARD CAME ON FOR NO REASON. THE SPEEDOMETER, TACHOMETER, GAS GAUGE, TEMPERATURE GAUGE, RADIO AND HEATER/AC CONTROLS AND TURN SIGNALS QUIT WORKING. ADDITIONAL WARNING LIGHTS ON DASHBOARD WE'RE STABILTRAC, ABS, AIR BAG, TIRE MONITOR AND BRAKE LIGHT. PREVIOUS TO THIS WE HAD PR…

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DRIVING TO WORK AND ALL THE EMERGENCY LIGHTS ON MY DASHBOARD CAME ON FOR NO REASON. THE SPEEDOMETER, TACHOMETER, GAS GAUGE, TEMPERATURE GAUGE, RADIO AND HEATER/AC CONTROLS AND TURN SIGNALS QUIT WORKING. ADDITIONAL WARNING LIGHTS ON DASHBOARD WE'RE STABILTRAC, ABS, AIR BAG, TIRE MONITOR AND BRAKE LIGHT. PREVIOUS TO THIS WE HAD PROBLEMS WITH THE BLIND SPOT MONITOR SYSTEM NOT FUNCTIONING. THE CAR HAS BEEN AT THE DEALERSHIP NOW FOR ABOUT 5 WEEKS WITH NO ANSWER. THEY CURRENTLY HAVE 3 OTHER IMPALAS WITH THE SAME PROBLEM. WE LIVE IN A TOWN OF UNDER 10,000 PEOPLE SO WHAT ARE THE ODDS THAT WE ARE THE ONLY ONES. SORRY I DO NOT HAVE ACCESS TO MY VIN NUMBER AT THIS TIME.

NHTSA ODI #11084476

101 miles · Aug 21, 2017
Electronic Stability Control (esc)Vehicle Speed Control

I WAS DRIVING ON THE EXPRESSWAY GOING 65 MILES AN HOUR AND SUDDENLY MY CAR WITHOUT WARNING WENT WAY DOWN TO 15 AND CAR WAS SAYING LOSS OF ENGINE POWER I WAS VERY AFRAID I ALSO HAD MY 3 YEAR OLD IN THE CAR WE WERE EARLY REAR ENDED BY I SEMI I PULLED TO THE EMERGENCY LANE AND SHUT THE CAR OFF WAITED 10 MINUTES STARTED IT UP AND…

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I WAS DRIVING ON THE EXPRESSWAY GOING 65 MILES AN HOUR AND SUDDENLY MY CAR WITHOUT WARNING WENT WAY DOWN TO 15 AND CAR WAS SAYING LOSS OF ENGINE POWER I WAS VERY AFRAID I ALSO HAD MY 3 YEAR OLD IN THE CAR WE WERE EARLY REAR ENDED BY I SEMI I PULLED TO THE EMERGENCY LANE AND SHUT THE CAR OFF WAITED 10 MINUTES STARTED IT UP AND ALL LIGHTS WERE OFF THE CAR DROVE FINE FOR 10 O 15 MINUTES AND THEN IT STARTED AGAIN THIS TIME THE POWER NEVER CAME BACK

NHTSA ODI #11018629

50,000 miles · Dec 22, 2016
Electronic Stability Control (esc)Power TrainVehicle Speed Control

ON 12/21/16 WHILE MERGING ONTO INTERSTATE 10 IN TUCSON, AZ, THE VEHICLE WAS GOING APPROXIMATELY 65 MPH WHEN A "ENGINE POWER REDUCED" SIGN POPPED UP, THE VEHICLE SLOWED DOWN TO 30 MPH WITHOUT WARNING AND SHIFTING DOWN THROUGH ALL GEARS NEARLY RED LINING THE RPMS AND CAUSING AN REAR-END COLLISION. WAS ABLE TO MOVE THE VEHICLE OFF …

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ON 12/21/16 WHILE MERGING ONTO INTERSTATE 10 IN TUCSON, AZ, THE VEHICLE WAS GOING APPROXIMATELY 65 MPH WHEN A "ENGINE POWER REDUCED" SIGN POPPED UP, THE VEHICLE SLOWED DOWN TO 30 MPH WITHOUT WARNING AND SHIFTING DOWN THROUGH ALL GEARS NEARLY RED LINING THE RPMS AND CAUSING AN REAR-END COLLISION. WAS ABLE TO MOVE THE VEHICLE OFF THE FREEWAY AND TOOK IT INTO LOCAL AUTO-ZONE FOR TESTING. THE TEST CAME BACK AS A "THROTTLE SENSOR MALFUNCTION". THE VEHICLE NOW DOESN'T FEEL SAFE TO DRIVE, AND WILL NOT ACCELERATE OVER 45 MPH WITHOUT SHAKING AND FEELING LIKE THE TRANSMISSION IS GOING TO GIVE OUT. CALLED THE LOCAL CHEVY DEALERSHIP AND WAS TOLD THE COST WAS GOING TO VARY BETWEEN $400-1,000 WITH A $100 TEST FEE UP FRONT. I'VE ALSO READ NUMEROUS SIMILAR ISSUES ONLINE FROM PEOPLE DRIVING CHEVROLET IMPALA FROM 2006-2016. THE CAR FEEL VERY UNSAFE TO DRIVE AND I FEEL IT COULD BE A DEATH TRAP AS THERE IS NO CONTROL OVER WHEN THE VEHICLE WILL CHOOSE TO DECELERATE WITHOUT WARNING. THERE HAS BEEN NO MECHANICAL ISSUES BEFORE THIS INCIDENT, AND THE VEHICLE HAS BEEN THROUGH NUMEROUS MECHANICAL MAINTENANCE UP-KEEPS THAT WERE RECOMMENDED BY SERVICE MANAGERS. *TR

NHTSA ODI #10937100

30,000 miles · Oct 20, 2016
Electronic Stability Control (esc)EngineVehicle Speed Control

MY IMPALA 2014 SUDDENLY SAYS 'SERVICE STABILITRAK' IN THE DISPLAY AND THE ENGINE POWER DRASTICALLY REDUCES. I HAVE SEE THIS IN FORUMS THAT IS A COMMON ISSUE WITH GM CARS AND IT HAPPENED TO ME COUPLE OF TIMES. THIS IS A VERY DANGEROUS ISSUE WHEN HAPPENS AT FREEWAYS OR ANY FASTER TRAFFIC ROUTES.

NHTSA ODI #10917654

18,000 miles · Jan 21, 2016
Vehicle Speed Control

TL* THE CONTACT OWNS A 2014 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE DRIVING AT 68 MPH WITH THE CRUISE CONTROL, THE BRAKE PEDAL WAS DEPRESSED WHICH DEACTIVATED THE CRUISE CONTROL SETTING. UPON RESUMING TO 68 MPH, THE CONTACT HIT RESUME ON THE CRUISE CONTROL, THE VEHICLE ACCELERATED TO 90 MPH WITHOUT WARNING, AND THE CONTA…

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TL* THE CONTACT OWNS A 2014 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE DRIVING AT 68 MPH WITH THE CRUISE CONTROL, THE BRAKE PEDAL WAS DEPRESSED WHICH DEACTIVATED THE CRUISE CONTROL SETTING. UPON RESUMING TO 68 MPH, THE CONTACT HIT RESUME ON THE CRUISE CONTROL, THE VEHICLE ACCELERATED TO 90 MPH WITHOUT WARNING, AND THE CONTACT TURNED THE CRUISE CONTROL OFF TO STOP THE ACCELERATION. THE VEHICLE WAS TAKEN TO A DEALER BUT WAS NOT DIAGNOSED OR REPAIRED. THE FAILURE RECURRED ON ANOTHER OCCASION. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 18,000. UPDATED 03/09/16*LJ *CN

NHTSA ODI #10821409

10,000 miles · Sep 16, 2015
Electrical SystemEngineVehicle Speed Control

WHEN DECELERATING AT A RED LIGHT WHICH TURNED GREEN, ATTEMPTED TO ACCELERATE WITH NO THROTTLE RESPONSE, EVEN WHEN PUSHED TO THE FLOOR FOR APPROXIMATELY 2 SECONDS OR MORE (SEVERAL SIMILAR INCIDENTS). SECOND INCIDENT, CAR STALLED AT A SLOW SPEED. THIRD INCIDENT, AFTER ACCELERATING THE ENGINE RPMS STAY REVING HIGH AFTER TAKING FOOT…

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WHEN DECELERATING AT A RED LIGHT WHICH TURNED GREEN, ATTEMPTED TO ACCELERATE WITH NO THROTTLE RESPONSE, EVEN WHEN PUSHED TO THE FLOOR FOR APPROXIMATELY 2 SECONDS OR MORE (SEVERAL SIMILAR INCIDENTS). SECOND INCIDENT, CAR STALLED AT A SLOW SPEED. THIRD INCIDENT, AFTER ACCELERATING THE ENGINE RPMS STAY REVING HIGH AFTER TAKING FOOT OFF THE GAS FOR SEVERAL SECONDS, AND THIS HAS HAPPENED ON SEVERAL OCCASIONS AND AS RECENTLY AS 9-16-15. THESE INCIDENTS ALL OCCURED BEFORE AND AFTER A COMPLETE GM DEALER REPROGRAMMED THE COMPUTER.

NHTSA ODI #10764439

Mileage unknown · Aug 17, 2015
Service BrakesVehicle Speed Control

ON A COUPLE OF DIFFERENT OCCASIONS I HAVE BEEN STOPPED AT A STOPLIGHT OR STOP SIGN. WHEN THE GAS PEDAL IS PRESSED TO ACCELERATE, THERE IS HESITATION BY THE VEHICLE TO ACCELERATE CAUSING THE VEHICLE'S ACT OF ACCELERATION TO OCCUR SEPARATELY FROM THE ACT OF PRESSING THE GAS PEDAL.

NHTSA ODI #10749169

300 miles · Sep 2, 2014
Electrical SystemEquipment Adaptive/mobilityVehicle Speed Control

FORWARD COLLISION AVOIDANCE SYSTEM INAPPROPRIATE ACTIVATION ON SEVERAL OCCASIONS AT DIFFERENT LOCATIONS. THERE WERE NO OTHER VEHICLE IN FRONT. THERE WERE THREE BEEPS/RED LIGHT FLASH ON WINDSHIELD. THE CRUISE CONTROL WOULD DEACTIVATE AND CAR WOULD DECELERATE BY THREE TO FIVE MILE. THE TAIL LAMPS ARE NOT ACTIVATED TO WARN DRIV…

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FORWARD COLLISION AVOIDANCE SYSTEM INAPPROPRIATE ACTIVATION ON SEVERAL OCCASIONS AT DIFFERENT LOCATIONS. THERE WERE NO OTHER VEHICLE IN FRONT. THERE WERE THREE BEEPS/RED LIGHT FLASH ON WINDSHIELD. THE CRUISE CONTROL WOULD DEACTIVATE AND CAR WOULD DECELERATE BY THREE TO FIVE MILE. THE TAIL LAMPS ARE NOT ACTIVATED TO WARN DRIVERS FOLLOWING. THIS IS MY SECOND COMPLAINT THE DEALER SOLUTION IS TO TURN OFF THE FEATURE. IT WORK WHEN IT SHOULD THE INAPPROPRIATE ACTIVATION IS A NUISANCE. *TR

NHTSA ODI #10630218

11,250 miles · Apr 23, 2014
Service BrakesVehicle Speed Control

WHILE DRIVING ON TEXAS HIGHWAY 287, SOUTHBOUND, MY ANTI-COLLISION ALERT SYSTEM ACTIVATED. IT SOUNDED A LOUD BEEPING, FOLLOWED BY A FULL APPLICATION OF ALL BRAKES. STARTLED, I WAS ABLE TO APPLY THE ACCELERATOR PEDAL TO RESUME MY SPEED. APPROXIMATELY 5 MILES FURTHER, THE INCIDENT REPEATED IT SELF. DURING THE FIRST INCIDENT, TH…

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WHILE DRIVING ON TEXAS HIGHWAY 287, SOUTHBOUND, MY ANTI-COLLISION ALERT SYSTEM ACTIVATED. IT SOUNDED A LOUD BEEPING, FOLLOWED BY A FULL APPLICATION OF ALL BRAKES. STARTLED, I WAS ABLE TO APPLY THE ACCELERATOR PEDAL TO RESUME MY SPEED. APPROXIMATELY 5 MILES FURTHER, THE INCIDENT REPEATED IT SELF. DURING THE FIRST INCIDENT, THERE WERE NO VEHICLES IN FRONT OF ME, NONE. THE ROAD WAS DRY, STRAIGHT AND FREE OF ANY OBSTACLES. THERE WAS NO TRAFFIC BEHIND ME. THE SECOND TIME THE CAR AUTOMATICALLY LOCKED UP MY BRAKES, THERE WAS A CAR BEHIND ME, BUT HE WAS ABLE TO SWERVE AND AVOID REAR-ENDING ME. AGAIN, THERE WAS NO TRAFFIC OF ANY TYPE AHEAD OF ME AND THE ROAD WAS FLAT, DRY AND STRAIGHT. AGAIN I WAS ABLE TO APPLY THE ACCELERATOR PEDAL TO REGAIN CONTROL OF THE CAR AND PULL OVER TO THE SIDE WHERE I .SHUT OFF THE ENGINE. I RESTARTED THE ENGINE AND PROCEEDED TO MY DESTINATION IN SPRINGTOWN, TEXAS WITHOUT FURTHER INCIDENT. I TOOK THE CAR TO THE DEALERSHIP THE NEXT WEEK FOR A DIAGNOSTIC SEARCH AND REPAIR OF THE INCIDENT. THEY HAD THE CAR FOR THREE DAYS AND TOLD ME NOTHING WAS WRONG WITH THE CAR. I'M FILING THIS COMPLAINT, BECAUSE I BELIEVE THAT THIS IS A POTENTIAL DEADLY THREAT TO ME, MY PASSENGERS, OR OTHER DRIVERS. *TR

NHTSA ODI #10584485

Official recalls

12

15V465000 · Air Bags

Jul 24, 2015

General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Impala vehicles manufactured April 15, 2013, to June 19, 2015, equipped with front vented-heated passenger seats. Accordingly, the Automatic Occupant Sensing (AOS) system may fail to suppress the front passenger air bag if a child seat is in the front passenger seat. These vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 208, "Occupant Crash Protection."

Consequence & remedy

Consequence: If the front passenger air bag deploys with a child seat in the front passenger seat, it increases the risk of injury to the child.

Remedy: GM will notify owners, and dealers will correct the calibration-learning error by preconditioning the empty seat, and also resetting the ECU to a seat zero-value, free of charge. The recall began on August 25, 2015. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 15400.

15V202000 · Parking Brake

Apr 6, 2015

General Motors LLC (GM) is recalling certain model year 2014 Chevrolet Impala vehicles manufactured March 22, 2013, to May 22, 2014. In the affected vehicles, the electronic parking brake piston actuation arm may not fully retract causing the brake pads to stay partially engaged. Thus, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Systems (FMVSS) No. 135 "Light Vehicle Brake Systems."

Consequence & remedy

Consequence: Brake pads that remain partially engaged with the rotors may cause excessive brake heat that may result in a fire.

Remedy: GM has notified owners, and dealers will reprogram the electronic parking brake control module with new software, free of charge. The recall began on May 6, 2015. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 15259. Note: The vehicles covered by this campaign were previously remedied incorrectly under campaigns 14V541 or 15V085.

15V085000 · Parking Brake

Feb 11, 2015

General Motors LLC (GM) is recalling certain model year 2014 Chevrolet Impala vehicles manufactured November 15, 2012, to May 30, 2014. In the affected vehicles, the electronic parking brake piston actuation arm may not fully retract causing the brake pads to stay partially engaged. Thus, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Systems (FMVSS) No. 135 "Light Vehicle Brake Systems."

Consequence & remedy

Consequence: Brake pads that remain partially engaged with the rotors may cause excessive brake heat that may result in a fire.

Remedy: GM will notify owners, and dealers will reprogram the electronic parking brake control module with new software, free of charge. The recall began March 5, 2015. Owners may contact Chevrolet customer service at 1-800-222-1020 (Chevrolet). GM's number for this recall is 15100. Note: This recall covers a limited population of vehicles that were remedied incorrectly under recall 14V-541.

14V614000 · Electrical System

Oct 1, 2014

General Motors LLC (GM) is recalling certain model year 2013-2014 Cadillac CTS, Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL, and 2014 Buick Enclave, Chevrolet Express, Impala, Silverado HD, Traverse, GMC Acadia, Savana, and Sierra HD vehicles. In the affected vehicles, the chassis electronic module may be internally contaminated, resulting in an electrical short.

Consequence & remedy

Consequence: If the module experiences an electrical short, the vehicle could stall, increasing the risk of a crash.

Remedy: GM will notify owners, and dealers will replace the chassis electronic module, free of charge. The recall began on December 26, 2014. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-458-006 (Cadillac), 1-800-222-1020 (Chevrolet), and 1-800-462-8782 (GMC). GM’s number for this recall is 14515.

14V541000 · Parking Brake

Sep 9, 2014

General Motors LLC (GM) is recalling certain model year 2013-2015 Cadillac XTS vehicles manufactured February 14, 2012, to August 22, 2014, and 2014-2015 Chevrolet Impala vehicles manufactured November 5, 2012, to September 2, 2014. In the affected vehicles, the electronic parking brake piston actuation arm may not fully retract causing the brake pads to stay partially engaged.

Consequence & remedy

Consequence: Brake pads that remain partially engaged with the rotors may cause excessive brake heat that may result in a fire.

Remedy: GM will notify owners, and dealers will update the electronic parking brake software, free of charge. The recall began on October 28, 2014. Owners may contact Chevrolet customer service at 1-800-222-1020, or Cadillac customer service at 1-800-458-8006. GM's number for this recall is 14471.

14V518000 · Air Bags:frontal:sensor/control MODULE-INACTIVE

Aug 28, 2014

General Motors LLC (GM) is recalling certain model year 2013-2014 Cadillac XTS vehicles manufactured April 11, 2013, to June 27, 2013, and 2014 Chevrolet Impala vehicles manufactured May 13, 2013, to November 5, 2013. The affected vehicles may have left the factory with the sensing and diagnostic module (SDM) set to "manufacturing mode."

Consequence & remedy

Consequence: In manufacturing mode, the vehicle's air bags will not deploy in the event of a crash, increasing the risk of occupant injury.

Remedy: GM will notify owners, and dealers are to reprogram the SDM to the correct mode, free of charge. The recall is expected to begin in September 2014. Owners may contact Cadillac customer service at 1-800-458-8006 or Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 14532.

14V489000 · Structure

Aug 8, 2014

General Motors LLC (GM) is recalling certain model year 2014-2015 Chevrolet Impala vehicles manufactured May 7, 2014, to July 28, 2014. In the event of an accident, the center storage console may not stay latched. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard No. 201, "Occupant Protection In Interior Impact."

Consequence & remedy

Consequence: The storage compartment door may not remain closed in the event of a crash, increasing the risk of occupant injury.

Remedy: Parts to remedy this condition are not currently available. GM will send owners an interim notification in early October 2014, and will send a second letter when parts are available. At that time dealers will inspect, and if necessary, replace the console storage compartment door inertia latch, free of charge. Owners may contact Chevrolet customer service at 1-800-222-1020. GM's number for this recall is 14476.

14V450000 · Steering:electric Power Assist System

Jul 23, 2014

General Motors LLC (GM) is recalling certain model year 2014 Chevrolet Impala vehicles manufactured November 5, 2012, to December 20, 2013. Due to a poor electrical ground connection to the Power Steering Control Module (PSCM), the affected vehicles may have a loss of power steering assist during start up or while driving.

Consequence & remedy

Consequence: If power steering assist is lost, greater driver effort would be required to steer the vehicle at low speeds, increasing the risk of a crash.

Remedy: GM will notify owners, and dealers will clean paint from behind the ground stud nut and update the PSCM software, free of charge. Owners may contact Chevrolet customer service at 1-800-222-1020. The recall began on August 21, 2014. GM's number for this recall is 14330.

14V409000 · Steering

Jul 2, 2014

General Motors LLC (GM) is recalling certain model year 2014 Buick Regal, Cadillac XTS, Chevrolet Camaro and Chevrolet Impala vehicles. Improperly torqued fasteners may cause the steering intermediate shaft and the steering gear and/or the lower control arm and the lower ball joint to separate.

Consequence & remedy

Consequence: If any of the components separate, the vehicle may have a loss of steering, increasing the risk of a crash.

Remedy: GM began to notify owners on June 27, 2014, and dealers will inspect the fasteners for correct torque, correcting them as necessary, free of charge. Owners may contact GM customer service at 1-800-521-7300 (Buick), 1-800-458-8006 (Cadillac) or 1-800-222-1020 (Chevrolet). GM's number for this recall is 14378.

14V355000 · Electrical System:ignition

Jun 23, 2014

This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring. General Motors LLC (GM) is recalling certain model year 2005-2009 Buick LaCrosse, 2006-2011 Buick Lucerne, 2000-2005 Cadillac DeVille, 2006-2011 Cadillac DTS, 2006-2014 Chevrolet Impala, and 2006-2007 Chevrolet Monte Carlo vehicles. In the affected vehicles, the weight on the key ring and road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.

Consequence & remedy

Consequence: If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury. Additionally, a key knocked out of the run position will cause loss of engine power, power steering, and power braking, increasing the risk of a vehicle crash.

Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 23, 2014. Owners may contact General Motors customer service at 1-800-521-7300 (Buick), 1-800-458-8006 (Cadillac), and 1-800-222-1020 (Chevrolet). GM's number for this recall is 14299.

14V092000 · Power Train:automatic Transmission

Feb 21, 2014

General Motors LLC (GM) is recalling certain model year 2014 Buick Regal, LaCrosse, Verano, and Enclave, and Chevrolet Impala, Malibu, Cruze, and Traverse, and GMC Acadia vehicles equipped with automatic transmissions. In the affected vehicles, the transmission shift cable adjuster may disengage from the transmission shift lever. As such, these vehicles do not conform to Federal Motor Vehicle Safety Standard (FMVSS) number 102, "Transmission Shift Lever Sequence, Starter Interlock, and Transmission Braking Effect." They also fail to conform to FMVSS number 114, "Theft Protection and Rollaway Prevention."

Consequence & remedy

Consequence: If a vehicle's shift cable disengages from the transmission shift lever, a driver may be unable to shift gear positions and the indicated shift position may not represent the gear position the vehicle is in. Should a disengagement occur while the vehicle is being driven, when the driver goes to stop and park the vehicle, the driver may be able to shift the lever to the "PARK" position, but the vehicle transmission may not be in the "PARK" gear position. If the vehicle is not in the "PARK" position there is a risk the vehicle will roll away as the driver and other occupants exit the vehicle or anytime thereafter. A vehicle rollaway increases the risk of injury to exiting occupants and bystanders.

Remedy: General Motors will notify owners, and dealers will inspect and replace any affected transmission shift cable adjusters, free of charge. The recall began on April 10, 2014. Chevrolet owners may contact General Motors at 1-800-222-1020, Buick owners at 1-800-521-7300, and GMC owners at 1-800-462-8782. General Motors' number associated with this recall is 14048.

13V220000 · Electrical System; Exterior Lighting:brake Lights

May 24, 2013

General Motors LLC (GM) is recalling certain model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; model year 2014 Chevrolet Impala; and 2013 Chevrolet Sonic vehicles. Originally, in May 2013, GM recalled 1,627 model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; and model year 2014 Chevrolet Impala vehicles. In October 2013, GM informed the agency that it was adding model year 2013 Chevrolet Sonic vehicles to this campaign , representing an additional 8,050 units. The total number of vehicles being recalled is now 9,677. On the affected vehicles, the brake lamps may intermittently flash without the brakes being applied and the cruise control may disengage. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108, "Lamps, reflective devices, and associated equipment."

Consequence & remedy

Consequence: If the brake lamps flash when the vehicle is not slowing, a following driver may not adjust vehicle speed when the vehicle is in fact braking, and the brake lamps are illuminating as intended, increasing the risk of a crash.

Remedy: GM will notify owners, and dealers will reprogram the body control module. The recall began on June 13, 2013. Owner's may contact Chevrolet at 1-800-630-2438 or Cadillac at 1-866-982-2339. GM's recall number is 13158.

Additional source detail variants (2)

Exterior Lighting:brake Lights

General Motors LLC (GM) is recalling certain model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; model year 2014 Chevrolet Impala; and 2013 Chevrolet Sonic vehicles. Originally, in May 2013, GM recalled 1,627 model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; and model year 2014 Chevrolet Impala vehicles. In October 2013, GM informed the agency that it was adding model year 2013 Chevrolet Sonic vehicles to this campaign , representing an additional 8,050 units. The total number of vehicles being recalled is now 9,677. On the affected vehicles, the brake lamps may intermittently flash without the brakes being applied and the cruise control may disengage. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108, "Lamps, reflective devices, and associated equipment."

Consequence: If the brake lamps flash when the vehicle is not slowing, a following driver may not adjust vehicle speed when the vehicle is in fact braking, and the brake lamps are illuminating as intended, increasing the risk of a crash.

Remedy: GM will notify owners, and dealers will reprogram the body control module. The recall began on June 13, 2013. Owner's may contact Chevrolet at 1-800-630-2438 or Cadillac at 1-866-982-2339. GM's recall number is 13158.

Electrical System

General Motors LLC (GM) is recalling certain model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; model year 2014 Chevrolet Impala; and 2013 Chevrolet Sonic vehicles. Originally, in May 2013, GM recalled 1,627 model year 2013 Cadillac ATS and model year 2013 Cadillac XTS; and model year 2014 Chevrolet Impala vehicles. In October 2013, GM informed the agency that it was adding model year 2013 Chevrolet Sonic vehicles to this campaign , representing an additional 8,050 units. The total number of vehicles being recalled is now 9,677. On the affected vehicles, the brake lamps may intermittently flash without the brakes being applied and the cruise control may disengage. Thus, these vehicles fail to conform to the requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 108, "Lamps, reflective devices, and associated equipment."

Consequence: If the brake lamps flash when the vehicle is not slowing, a following driver may not adjust vehicle speed when the vehicle is in fact braking, and the brake lamps are illuminating as intended, increasing the risk of a crash.

Remedy: GM will notify owners, and dealers will reprogram the body control module. The recall began on June 13, 2013. Owner's may contact Chevrolet at 1-800-630-2438 or Cadillac at 1-866-982-2339. GM's recall number is 13158.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

2

AQ17002 · Bical Chevrolet/loss Of Power Steering

Opened Mar 16, 2017 · Closed May 14, 2020

Status: closed (inferred from source dates) · Steering:electric Power Assist System

NHTSA opened AQ17-002 to determine whether BiCal Chevrolet of Valley Stream, New York (BiCal) has complied with the requirements of the National Traffic and Motor Vehicle Safety Act, 49 U.S.C. Chapter 301 (Safety Act) and its implementing regulations. The Safety Act requires, among other things, that a manufacturer notify its dealers of defects related to motor vehicle safety and non-compliances with Federal Motor Vehicle Safety Standards and, in turn, that a dealer not sell a new vehicle subject to a recall unless the recall remedy has been performed (49 U.S.C. ?30120(i)).NHTSA issued an information request (IR) letter to BiCal on March 15, 2017. BiCal responded to this request on November 8, 2017. On March 16, 2017, an IR letter was issued to General Motors LLC (GM) and a response was received from GM on April 28, 2017. In NHTSA?s view, it had difficulties in obtaining responses to IR letters from BiCal throughout the AQ investigation, including not receiving a response to the first IR until more than three months after the original deadline. Additionally, in NHTSA's view, BiCal failed to provide a full response to the second IR. BiCal does not contest NHTSA's conclusion that it violated the Safety Act by initially failing to provide full and complete responses to the IRs from NHTSA by their deadlines. NHTSA's investigation also indicated that BiCal sold and delivered at least 54 recalled vehicles that did not have the recall remedy completed at the time the vehicles were delivered to the customers.BiCal did not contest NHTSA?s conclusion that it violated the Safety Act by selling and delivering certain new motor vehicles that were subject to a recall before the vehicles were remedied.Under a Settlement Agreement dated March 11, 2019, BiCal agreed to pay compromised civil penalties in the amount of $40,000. This Audit Query is closed.

PE14010 · Active Safety System Malfunction

Opened Apr 15, 2014 · Closed Nov 21, 2014

Status: closed (inferred from source dates) · Forward Collision Avoidance; Forward Collision Avoidance: Adaptive Cruise Control; Forward Collision Avoidance: Crash Imminent Braking; Parking Brake; Parking Brake:indicator Light

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c

Additional source detail variants (5)

Forward Collision Avoidance: Adaptive Cruise Control

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c

Forward Collision Avoidance: Crash Imminent Braking

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c

Forward Collision Avoidance

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c

Parking Brake

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c

Parking Brake:indicator Light

On April 15, 2014, the Office of Defects Investigations (ODI) opened Preliminary Evaluation PE14-010 based on two complaints alleging incidents of sudden/severe uncommanded braking resulting in rear impact collisions in model year (MY) 2014 Chevrolet Impala vehicles.ODI analyzed all complaints related to allegations of unwanted brake activations while driving that were provided by GM or submitted to ODI from consumers and has not identified any additional incidents involving sudden, extended (greater than 1 second) autonomous braking.The two crash complaints that were the basis of PE14-010 involved rental vehicles equipped with an Electric Park Brake (EPB) system.Neither vehicle was equipped with Full Speed Range Adaptive Cruise Control (FSRACC) or Forward Collision Alert (FCA) systems. According to GM, brake lights will be illuminated if the service brakes are applied or the EPB system is activated while the vehicle is moving (dynamic EPB brake apply).In a dynamic EPB brake apply, the Electric Brake Control Module (EBCM) initiates a controlled deceleration while activating a chime and a telltale light.If the service brake is applied at any time during dynamic EPB brake apply, the system provides a substantially greater deceleration.Witness statements and analysis of crash data from the two incidents are consistent with inadvertent dynamic EPB brake applications.Both reports alleged beeping noise immediately before the accidents and one pre-crash data report shows a moderate initial vehicle deceleration followed by in increase in deceleration to approximately 0.6g just prior to the vehicle stopping and being struck from the rear.During this investigation, General Motors LLC (GM) inspected the two crash incident vehicles and examined each of the EPB switches to assess potential mechanical and electrical fault conditions.The testing and part examination did not find any evidence of mechanical or electrical failure of the EPB switches and GM did not identify any faults in the subject components or systems that could have caused or contributed to autonomous brake applications in the incident vehicles.According to GM, the evidence indicates the events were caused by inadvertent driver actuation of the EPB switch. Additionally, during this investigation, GM identified a defect condition in the EPB software in approximately 132,921 model year (MY) 2014 through 2015 Chevrolet Impala and MY 2013 through 2015 Cadillac XTS vehicles (Recall No. 14V-541) that could result in failure of the EPB to release after vehicle start-up.In this condition, the electronic parking brake piston actuation arm may not fully retract when the driver disengages the EPB, which may cause the brake pads to stay partially engaged with the rotor.According to GM, the parking brake indicator may not illuminate when the EPB is engaged and the driver may experience poor vehicle acceleration, undesired deceleration during idle coast-down, excessive brake heat, and premature wear to some brake components. If the vehicle is operated for an extended period of time in this condition, there is a potential for the rear brakes to generate significant heat, smoke, and sparks.GM and its supplier, Mando Pyeongtaek, upgraded the EPB software to address brake drag conditions and issued a recall bulletin on September 4, 2014 instructing dealers to reprogram the electronic parking brake control module on all affected vehicles. This preliminary evaluation is closed.The closing of this investigation does not constitute a finding that a safety-related defect does not exist.For additional information regarding this investigation, see Attachment A to this c