NHTSA owner reports · September 18, 2026 snapshot.
Vehicle Speed Control complaints
69 reportsClear category filter77,000 miles · Oct 6, 2014
Electrical SystemEngineTraction Control System
TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. WHILE DRIVING 70 MPH, THE TRACTION CONTROL AND REDUCE ENGINE POWER WARNING INDICATORS ILLUMINATED AS THE VEHICLE DECELERATED TO 10 MPH. THE FAILURE OCCURRED ON SEVERAL OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIM…
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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. WHILE DRIVING 70 MPH, THE TRACTION CONTROL AND REDUCE ENGINE POWER WARNING INDICATORS ILLUMINATED AS THE VEHICLE DECELERATED TO 10 MPH. THE FAILURE OCCURRED ON SEVERAL OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 77,000. UPDATED 12/30/14*CN UPDATED 05/28/2015 *JS
NHTSA ODI #10641668
42,000 miles · Sep 6, 2014
Electronic Stability Control (esc)Service BrakesVehicle Speed ControlFire
DEC 2013 VEHICLE HIT POT HOLE WHILE BRAKING AT APPROACHING INTERSECTION, AFTER THAT WARNING LIGHTS STARTED FLASHING ABS BRAKES/TRACT CONTROL/STAB CONTROL, I WAS UNABLE TO BRAKE, THEN SHUT DOWN. SINCE THEN TEMP GAUGE WENT BAD N WAS REPLACED. THE 3 ABOVE DASH WARNING LIGHTS CONTINUED INTERMITTENTLY, WORSE WHEN IT RAINED. AT TAKE …
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DEC 2013 VEHICLE HIT POT HOLE WHILE BRAKING AT APPROACHING INTERSECTION, AFTER THAT WARNING LIGHTS STARTED FLASHING ABS BRAKES/TRACT CONTROL/STAB CONTROL, I WAS UNABLE TO BRAKE, THEN SHUT DOWN. SINCE THEN TEMP GAUGE WENT BAD N WAS REPLACED. THE 3 ABOVE DASH WARNING LIGHTS CONTINUED INTERMITTENTLY, WORSE WHEN IT RAINED. AT TAKE OFFS N TURNS CAR WOULD JAR N ABS BRAKE SYSTEM WOULD PULSATE(GRABS). HUB/SPEED SENSOR WAS REPLACED, THIS DID NOT HELP. ACCESSORY OUTLETS, WHEN CONTAINED W A CHARGER, DOESN'T MAINTAIN CONTACT W POWER SOURCE (SUCH AS DISCONNECTION/LOOSE CONNECTION), CAUSING POWER SURGE RESULTING IN 2 IPHONES TO HAVE BAD AUX PORTS. MAY 2014 BLOWER MOTOR STARTED INTERMITTENTLY NOT WORKING FOR SECONDS, THEN MINUTES UNTIL TODAY SEPT 6TH, 2014 WHEN SOMETHING UNDER-DASH (NEAR BLOWER MOTOR) OVERHEATED FILLING CAR WITH SMOKE, THEN CAR SHUT DOWN WHILE MOVING ONCE AGAIN, CAR SMELLS AWFUL FROM THE BURNING! CAR HAS BEEN A LEMON AND NOT COVERED UNDER POWER TRAIN! SEEMS LIKE AUXILIARY ELECT FUSE BOX(PASSENGER RT FOOT BOARD), AND HARNESS IS SHOT AS WELL AS WHICHEVER HARNESS IS SENDING POWER TO SPEED SENSOR, AMONG MANY OTHER THINGS I COULD NOT MENTION (PROBLEMS/DEFECTS) DUE TO SO MANY OTHER ISSUES W THIS 2011 IMPALA WHICH IS NOW WORTH 7000 AS TRADE AT CHEVY, I PAID 13500 ON OCT14, 2014! I'VE CHECKED SEVERAL GROUND CONNECTS N THEY SEEM OKAY. *TR
NHTSA ODI #10631294
79,800 miles · Jun 28, 2014
Electronic Stability Control (esc)EngineVehicle Speed Control
THE SERVICE STABILITRAK, TRACTION CONTROL, AND REDUCED ENGINE POWER WARNINGS CAME ON AND THE CAR STARTED TO LOSE POWER GOING AROUND A CURVE. I TEMPORARILY LOST THE ABILITY TO ACCELERATE NEARLY CAUSING ME TO GET REAR ENDED BY A VEHICLE BEHIND ME. SINCE THE INCIDENT OCCURRED THE CAR HAS BEEN VERY SLUGGISH AND UNSAFE TO OPERATE. I …
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THE SERVICE STABILITRAK, TRACTION CONTROL, AND REDUCED ENGINE POWER WARNINGS CAME ON AND THE CAR STARTED TO LOSE POWER GOING AROUND A CURVE. I TEMPORARILY LOST THE ABILITY TO ACCELERATE NEARLY CAUSING ME TO GET REAR ENDED BY A VEHICLE BEHIND ME. SINCE THE INCIDENT OCCURRED THE CAR HAS BEEN VERY SLUGGISH AND UNSAFE TO OPERATE. I AM PLANNING TO GET THIS SERVICED ASAP. AFTER READING MANY FORUM POSTS ONLINE REGARDING THIS SAFETY ISSUE, I BELIEVE A RECALL SHOULD BE ISSUED. I WAS SHOCKED TO SEE HOW RAMPANT OF A PROBLEM THIS AND THAT IT IS USUALLY CAUSED BY A FAULTY THROTTLE BODY THAT ISN'T COVERED IN THE 100K MILE POWERTRAIN WARRANTY. MYSELF AND MANY OTHERS FROM WHAT I HAVE READ BELIEVE THIS TO BE A VERY DANGEROUS MALFUNCTION. IF THIS WERE TO HAPPEN AT HIGH SPEEDS ON THE HIGHWAY SOMEONE COULD VERY EASILY BE KILLED IF THEIR CAR LOSES POWER DUE TO THIS. *TR
NHTSA ODI #10606682
113,982 miles · May 19, 2014
Vehicle Speed Control
TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. WHILE DRIVING 70 MPH, THE CONTACT EXPERIENCED DIFFICULTY MANEUVERING THE GEAR SHIFTER AND THE VEHICLE JERKED. THE CHECK ENGINE AND SERVICE THROTTLE INDICATORS ILLUMINATED AS THE ENGINE STALLED. THE VEHICLE WAS TAKEN TO A MECHANIC, WHO STATED THAT THE THROTTLE POSITION SENSOR NEED…
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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. WHILE DRIVING 70 MPH, THE CONTACT EXPERIENCED DIFFICULTY MANEUVERING THE GEAR SHIFTER AND THE VEHICLE JERKED. THE CHECK ENGINE AND SERVICE THROTTLE INDICATORS ILLUMINATED AS THE ENGINE STALLED. THE VEHICLE WAS TAKEN TO A MECHANIC, WHO STATED THAT THE THROTTLE POSITION SENSOR NEEDED TO BE REPLACED. THE FAILURE RECURRED. THE VEHICLE HAS NOT BEEN REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE APPROXIMATE FAILURE MILEAGE WAS 113,982.
NHTSA ODI #10592362
46,000 miles · May 16, 2014
Electronic Stability Control (esc)Vehicle Speed Control
I WAS ON THE HIGHWAY DOING 60MPH AND MY DASH SHOWED A MESSAGE ENGINE POWER REDUCED, SERVICE TRACTION STATION, SERVICE STABILITRAK. THE STEERING WHEEL COMPLETELY LOCKED UP AND THE CAR SHUT OFF. I ALMOST CAUSED A MAJOR ACCIDENT A CAR HAD TO SWERVE AROUND ME. I MANAGED TO GET TO THE SIDE OF THE ROAD IN THE CONSTRUCTION AREA. THIS H…
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I WAS ON THE HIGHWAY DOING 60MPH AND MY DASH SHOWED A MESSAGE ENGINE POWER REDUCED, SERVICE TRACTION STATION, SERVICE STABILITRAK. THE STEERING WHEEL COMPLETELY LOCKED UP AND THE CAR SHUT OFF. I ALMOST CAUSED A MAJOR ACCIDENT A CAR HAD TO SWERVE AROUND ME. I MANAGED TO GET TO THE SIDE OF THE ROAD IN THE CONSTRUCTION AREA. THIS HAS TO BE LOOKED INTO. I'VE RESEARCHED ONLINE AND I SEE A LOT OF IMPALAS ARE HAVING THIS SAME PROBLEM. THIS SHOULD BE CONSIDERED A SERIOUS SAFETY RISK. *TR
NHTSA ODI #10588829
64,613 miles · May 15, 2014
EngineVehicle Speed Control
TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE DRIVING 70 MPH, THE VEHICLE BEGAN TO RAPIDLY DECELERATE. THE SERVICE TRACTION, CHECK ENGINE AND REDUCED ENGINE POWER LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO A DEALER WHERE THE TECHNICIAN DIAGNOSED THAT THE THROTTLE POSITION S…
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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA. THE CONTACT STATED THAT WHILE DRIVING 70 MPH, THE VEHICLE BEGAN TO RAPIDLY DECELERATE. THE SERVICE TRACTION, CHECK ENGINE AND REDUCED ENGINE POWER LIGHTS ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE WAS TAKEN TO A DEALER WHERE THE TECHNICIAN DIAGNOSED THAT THE THROTTLE POSITION SENSOR MALFUNCTIONED. THE THROTTLE BODY AND GASKET WERE REPLACED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 64,613. THE CURRENT MILEAGE WAS 72,200.
NHTSA ODI #10588587
43,000 miles · May 13, 2014
Fuel/propulsion SystemVehicle Speed Control
WHILE DRIVING HOME FROM WORK ONE EVENING THE GAS PEDAL SEEMED TO HAVE A MIND OF ITS OWN. AS I REMOVED MY FOOT FROM THE GAS AND WHEN TO APPLY THE BRAKE THE GAS PEDAL DID NOT COME BACK UP AND WAS STUCK IN POSITION. THIS HAS SUBSEQUENTLY HAPPENED ON 2 OTHER OCCASIONS AS WELL. MY 2011 CHEVROLET IMPALA IS 3 YEARS AND 6 WEEKS OLD. …
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WHILE DRIVING HOME FROM WORK ONE EVENING THE GAS PEDAL SEEMED TO HAVE A MIND OF ITS OWN. AS I REMOVED MY FOOT FROM THE GAS AND WHEN TO APPLY THE BRAKE THE GAS PEDAL DID NOT COME BACK UP AND WAS STUCK IN POSITION. THIS HAS SUBSEQUENTLY HAPPENED ON 2 OTHER OCCASIONS AS WELL. MY 2011 CHEVROLET IMPALA IS 3 YEARS AND 6 WEEKS OLD. AS MY LOCAL CHEVY DEALER (CHEVROLET OF HOMEWOOD IL) HAS INFORMED ME MY THROTTLE SENSOR IS STICKING CAUSING THE GAS PETAL TO STAY DOWN. COMMON SENSE WOULD TELL ANYONE THIS IS NOT A GOOD THING. I WAS INFORMED THAT BECAUSE MY WARRANTY EXPIRED 6 WEEKS AGO THAT THE $500. REPAIR TO REPLACE A SENSOR IS MY RESPONSIBILITY. NOW I UNDERSTAND THE WARRANTY EXPIRING. HOWEVER, A SENSOR ON THE THROTTLE IS A PART I BELIEVE SHOULD NOT GO BAD AFTER ONLY 40000 MILES. HOW MANY POTENTIAL ACCIDENTS ARE WAITING TO HAPPEN BECAUSE OF A PROBLEM LIKE THIS. THIS IS MY WIFE'S CAR AND SHE EXPERIENCED THE GAS PEDAL STICKING IN THE DOWN POSITION ON AT LEAST 3 OCCASIONS. LUCKILY SHE WAS NOT IN A DANGEROUS SITUATION WHEN IT HAPPENED. THIS IS SOMETHING I FEEL SHOULD BE BROUGHT TO THE ATTENTION OF GM CORP. THANK YOU FOR A FORUM TO LET SOMEONE KNOW AND HOPEFULLY SOMETHING CAN BE DONE BEFORE SOMEONE GETS SERIOUSLY HURT. *TR
NHTSA ODI #10588095
62,000 miles · May 13, 2014
Electronic Stability Control (esc)Vehicle Speed Control
TRAVELING AT HIGHWAY SPEED, THE DASHBOARD LIGHTS CAME ON AND THE VEHICLE BEGAN TO LOSE SPEED. STEPPING ON THE ACCELERATOR PEDAL HAD NO EFFECT AND I MOVED TO THE RIGHT LANE, I HAD BEEN PASSING ANOTHER VEHICLE AT THE TIME. I DROVE THE CAR AT THE SPEED WHICH IT PERMITTED WITH MY FOUR-WAY BLINKERS ON UNTIL I ARRIVED HOME. IT WAS AT …
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TRAVELING AT HIGHWAY SPEED, THE DASHBOARD LIGHTS CAME ON AND THE VEHICLE BEGAN TO LOSE SPEED. STEPPING ON THE ACCELERATOR PEDAL HAD NO EFFECT AND I MOVED TO THE RIGHT LANE, I HAD BEEN PASSING ANOTHER VEHICLE AT THE TIME. I DROVE THE CAR AT THE SPEED WHICH IT PERMITTED WITH MY FOUR-WAY BLINKERS ON UNTIL I ARRIVED HOME. IT WAS AT NIGHT AND THERE WAS NO WHERE ELSE TO GO. THE NEXT DAY, THE PROBLEM WAS NOT EVIDENT, BUT I TOOK IT TO THE DEALER FROM WHOM I HAD PURCHASED IT, USED. THAT DEALER WAS UNABLE TO ASCERTAIN THE PROBLEM, AND TOOK THE CAR TO A LOCAL CHEVROLET FRANCHISE WHERE IT WAS "REPAIRED" AND RETURNED. SEVERAL DAYS LATER, THE SAME PROBLEM OCCURRED WHEN I WAS ENTERING A HIGHWAY I COULD NOT ACCELERATE INTO TRAFFIC. THIS TIME, AS IT HAPPENED DURING THE DAY, I AGAIN TOOK IT TO MY DEALER. IT WAS SUGGESTED THAT I DEAL DIRECTLY WITH THE LOCAL CHEVROLET DEALER TO WHOM HE HAD TAKEN THE CAR THE FIRST TIME. THAT DEALER HAD IT FOR SEVERAL DAYS. THE DEALERSHIP CONTACTED THE FACTORY DIRECTLY FOR INSTRUCTIONS TO FIX THE PROBLEM, . TO DATE, THERE HAS BEEN NO RE-OCCURRENCE OF THIS, NOR ANY OTHER PROBLEM. THE FIRST VISIT FOR REPAIR COST ABOUT $200 AND THE SECOND $500. I CONTACTED GENERAL MOTORS DIRECTLY AND THEY AGREED TO REFUND $250 EARLIER THIS YEAR. *TR
NHTSA ODI #10588019
47,000 miles · Apr 19, 2014
Electronic Stability Control (esc)Traction Control SystemVehicle Speed Control
STARTED CAR HAD CAR FOR 2YRS NOW NO PROBLEM WHAT SO EVER AND THE SERVICE TRACTION AND STABILITY CONTROL AND ALSO REDUCED ENGINE POWER CAME ON AS WELL AS ENGINE LIGHT IT JERKED WENT IT SHIFTED AND DIDN'T ACT LIKE IT HAD IT POWER AS ALWAYS BUT I JUST DROVE IT 35 MPH TO GET IT HOME THIS I WOULD THINK IS A GREAT BIG SAFETY ISSUE SH…
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STARTED CAR HAD CAR FOR 2YRS NOW NO PROBLEM WHAT SO EVER AND THE SERVICE TRACTION AND STABILITY CONTROL AND ALSO REDUCED ENGINE POWER CAME ON AS WELL AS ENGINE LIGHT IT JERKED WENT IT SHIFTED AND DIDN'T ACT LIKE IT HAD IT POWER AS ALWAYS BUT I JUST DROVE IT 35 MPH TO GET IT HOME THIS I WOULD THINK IS A GREAT BIG SAFETY ISSUE SHOULDN'T GM HAVE A RECALL ON THIS? *TR
NHTSA ODI #10583616
27,000 miles · Mar 31, 2014
Vehicle Speed Control
TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA VIN #[XXX]. THE CONTACT STATED WHILE DRIVING THE VEHICLE INCREASED AND DECREASED IN SPEED WITH OUT NO CONTROL. THE CONTACT MENTIONED THAT THE SPEED REDUCE SERVICE TRACTION CONTROL WARNING LIGHT ILLUMINATED. THE VEHICLE WAS DIAGNOSED WITH A THROTTLE BODY DEFECT. THE VEHICLE WAS REPAIRE…
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TL* THE CONTACT OWNS A 2011 CHEVROLET IMPALA VIN #[XXX]. THE CONTACT STATED WHILE DRIVING THE VEHICLE INCREASED AND DECREASED IN SPEED WITH OUT NO CONTROL. THE CONTACT MENTIONED THAT THE SPEED REDUCE SERVICE TRACTION CONTROL WARNING LIGHT ILLUMINATED. THE VEHICLE WAS DIAGNOSED WITH A THROTTLE BODY DEFECT. THE VEHICLE WAS REPAIRED BUT THE FAILURE RECURRED. THE MANUFACTURE WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 27,000 AND THE CURRENT MILEAGE WAS 27,800. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10575804