NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter115,000 miles · Mar 14, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS TRAVELING 35 MPH WHEN HE HAD TO ABRUPTLY APPLY THE BRAKES TO AVOID CRASHING INTO A VEHICLE THAT DROVE INTO HIS LANE. THERE WAS AN UNUSUAL INCREASE IN STOPPING DISTANCE AND TIME. THE CONTACT INSPECTED THE VEHICLE AND DISCOVERED THAT THE BRAKE LINES FROM THE MASTER C…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS TRAVELING 35 MPH WHEN HE HAD TO ABRUPTLY APPLY THE BRAKES TO AVOID CRASHING INTO A VEHICLE THAT DROVE INTO HIS LANE. THERE WAS AN UNUSUAL INCREASE IN STOPPING DISTANCE AND TIME. THE CONTACT INSPECTED THE VEHICLE AND DISCOVERED THAT THE BRAKE LINES FROM THE MASTER CYLINDER TO THE ABS UNIT AND FROM THE ABS UNIT TO THE FRONT BRAKES WERE CORRODED. THE FAILURE MILEAGE AND CURRENT MILEAGE WAS 115,000.
NHTSA ODI #10390130
36,669 miles · Mar 10, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THE ABS SPEED SENSOR WAS REPLACED UNDER THE WARRANTY IN 2003 BUT THE REPAIR DID NOT CORRECT THE FAILURE. WHILE DRIVING AT APPROXIMATELY 10 MPH, HE ATTEMPTED TO BRAKE AND THE ABS ENGAGE. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT THE ANTI-LOCK…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THE ABS SPEED SENSOR WAS REPLACED UNDER THE WARRANTY IN 2003 BUT THE REPAIR DID NOT CORRECT THE FAILURE. WHILE DRIVING AT APPROXIMATELY 10 MPH, HE ATTEMPTED TO BRAKE AND THE ABS ENGAGE. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT THE ANTI-LOCK HYDRAULIC REPAIR WAS PERFORMED IN 2005 UNDER RECALL NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTI-LOCK HYDRAULIC). THE CONTACT STATED THE RECALL REPAIR WAS PERFORMED ON THE VEHICLE BUT THE MAUNFACTURER WOULD NOT ASSIST. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 36,669, AND THE CURRENT FAILURE WAS 90,000. UPDATED 03/31/11*LJ UPDATED 1/13/2012 *LN THE CONSUMER STATED BOTH FRONT HUB ASSEMBLIES WERE REPLACED. *TR
NHTSA ODI #10389755
50,000 miles · Mar 10, 2011
Parking BrakeService Brakes, Hydraulic
HYDRAULIC BRAKE FAILURE. NHTSA ACTION NUMBER:PEO5020 WAS TOLD BY THE DEALER THIS WAS LIKELY THE "WHEEL SPEED SENSOR" AND REQUIRED A COMPLETE WHEEL BEARING REPLACEMENT AS THAT IS THE ONLY WAY THE "WHEEL SPEED SENSOR" COULD BE REPLACED. I BECAME SUSPICIOUS AFTER LOOKING AT THE "SERVICE ADVISORS" WRIT-UP WHICH WAS NOTHING LIKE I HA…
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HYDRAULIC BRAKE FAILURE. NHTSA ACTION NUMBER:PEO5020 WAS TOLD BY THE DEALER THIS WAS LIKELY THE "WHEEL SPEED SENSOR" AND REQUIRED A COMPLETE WHEEL BEARING REPLACEMENT AS THAT IS THE ONLY WAY THE "WHEEL SPEED SENSOR" COULD BE REPLACED. I BECAME SUSPICIOUS AFTER LOOKING AT THE "SERVICE ADVISORS" WRIT-UP WHICH WAS NOTHING LIKE I HAD DESCRIBED TO HIM OR THE MECHANIC AND NOTHING LIKE THEY HAD TOLD ME THE REPAIR WAS. WHEN CONFRONTING THE "SERVICE ADVISOR" ABOUT THE WAY IT WAS WRITTEN UP, HIS RESPONSE WAS "THIS WAS MY WAY OF WRITING IT UP". AFTER LOOKING UP THE NHTSA INFORMATION WHICH I PRINTED OUT, IT APPEARS THE MANUFACTURER WAS TO PAY FOR THE COMPLETE REPAIR. I WAS CHARGED BY THE DEALER FOR THE COMPLETE REPAIR. AFTER GETTING HOME I SEARCHED THE INTERNET FOR RECALLS AND HERE I AM - LOOKING FOR HELP IN THIS FRAUD BY THE DEALER. I AM NOW SUSPICIOUS THAT THEY MIGHT BE DOUBLE CHARGING - IE: CHARGE THE CUSTOMER AND ALSO CHARGE GM? ANOTHER REPAIR I HAD COMPLETED AT THE SAME TIME WAS A DEFECTIVE PARKING BRAKE - TOTAL FAILURE. NHTSA ACTION NUMBER: EAO4011 WAS TOLD BY THE DEALER MECHANIC THE LININGS WEAR EVEN WHEN THE PARKING BRAKE WAS NOT APPLIED. REQUIRED LININGS AND OTHER PART REPLACEMENT FOR WHICH I WAS ALSO CHARGED. IN THE RECALL VEHICLES I DID NOT SEE MY VEHICLE HOWEVER THE MECHANIC DESCRIBED THE CONDITION JUST AS THE RECALL NOTICE DESCRIBED IT SO I'M THINKING THIS VEHICLE MIGHT ALSO BE INCLUDED? THEY ALSO RECOMMENDED A BRAKE FLUSH - WHICH I HAD DONE AND NOW AM THINKING THIS MIGHT HAVE BEEN REQUIRED WHEN THE RECALL WORK WAS COMPLETED? I FIRST STARTED NOTICING THE PROBLEM (NHTSA ACTION NUMBER: PEO5020) WHEN PULLING INTO PARKING SPACES THIS WINTER HOWEVER DISMISSED IT AT FIRST THINKING I MAY HAVE BEEN ON ICE. I CAME VERY CLOSE TO SMASHING INTO A BLOCK WALL ON ONE OCCASION, A FENCE AND PARKING CURB ON OTHERS. THANKS. THANKS. *TR
NHTSA ODI #10389713
80,800 miles · Mar 1, 2011
Service Brakes, HydraulicCrash
SPEED WHEEL SENSOR FAILURE, GM DO NOT WANT TO BE RESPONSIBLE FOR THE SAFETY RECALL, THEY GAVE ME A CASE NUMBER, AND TOLD ME BECAUSE I WAS THE SECOND OWNER WARRANTY DOES NOT COVER TO FIX THE PROBLEM. *TR
NHTSA ODI #10386118
76,000 miles · Jan 30, 2011
Service Brakes, Hydraulic
AS I APPROACHED A STOP SIGN IN MY 2001 CHEVROLET SILVERADO 1500, I APPLIED PRESSURE TO THE BRAKE PEDAL ONLY TO HAVE IT GO ALL THE WAY TO FLOOR. THANKFULLY I WAS NOT GOING FAST, AND THERE WAS ENOUGH PRESSURE REMAINING IN THE BRAKE LINE TO SLOW ME DOWN (HAD I BEEN GOING FASTER THAN 5 MPH, I DON'T KNOW THAT WOULD HAVE BEEN THE CAS…
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AS I APPROACHED A STOP SIGN IN MY 2001 CHEVROLET SILVERADO 1500, I APPLIED PRESSURE TO THE BRAKE PEDAL ONLY TO HAVE IT GO ALL THE WAY TO FLOOR. THANKFULLY I WAS NOT GOING FAST, AND THERE WAS ENOUGH PRESSURE REMAINING IN THE BRAKE LINE TO SLOW ME DOWN (HAD I BEEN GOING FASTER THAN 5 MPH, I DON'T KNOW THAT WOULD HAVE BEEN THE CASE). AFTER BEING TOWED TO THE DEALER, THE INSPECTION SHOWED THAT THE BRAKE LINE HAD RUSTED THROUGH; THIS CAUSED THE BRAKES TO FAIL. THE VEHICLE HAD ITS MOST RECENT MAINTENANCE DONE LESS THAN A MONTH AND 20 MILES PRIOR AND NO ISSUES WERE FOUND. I FOLLOWED UP WITH FURTHER REVIEW OF MY OWN ON THE INTERNET TO FIND THAT THIS IS A PROBLEM, ESPECIALLY IN THE RUST BELT STATES WHERE SALT IS USED EACH WINTER. I AM GLAD THAT I WAS ABLE TO STOP, AND AM GRATEFUL THAT I WAS NOT ON A BUSY ROAD GOING AT A HIGHER SPEED. I CANNOT IMAGINE WHY SUCH A VITAL PIECE OF EQUIPMENT ON ANY VEHICLE WOULD BE MADE OF A MATERIAL THAT COULD NOT WITHSTAND THE ELEMENTS BETTER. IN ADDITION, I WOULD HAVE THOUGHT THAT SUCH A FLAW WOULD HAVE PROMPTED A SAFETY RECALL BEFORE ANYONE DOES GET HURT. *TR
NHTSA ODI #10379592
100,100 miles · Jan 19, 2011
Service Brakes, HydraulicCrash
LOSS OF BRAKES DUE TO BRAKE LINE CORROSION, RUST OUT. A DEER RAN INTO THE HIGHWAY, HIT BRAKES TO STOP AND BRAKE PEDAL WENT TO FLOOR. HIT DEER AND DID MAJOR DAMAGE TO FRONT OF TRUCK. AFTER INSPECTION, ALL BRAKE LINES NEED REPLACED. UNSAFE TO DRIVE. THIS CAN CAUSE A MAJOR ACCIDENT, INJURY OR EVEN DEATH. *TR
NHTSA ODI #10377885
116,000 miles · Jan 12, 2011
Service Brakes, Hydraulic
IN MY 2001 CHEVY SILVER AUTO, EVERY TIME I COME TO A STOP AT A STOP SIGN I AM EXPERIENCING UNWANTED ANTI-LOCK BRAKE SYSTEM APPLICATION. THIS HAPPENS EVERY TIME I STOP AND HAPPENS AT LOW SPEEDS ONLY. I HAVE FOUND THERE WAS A RECALL ON THIS SAME ISSUE ( NHTSA CAMPAIGN # 05V379000). THIS HOWEVER DOES NOT INCLUDE MY VEHICLE BUT …
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IN MY 2001 CHEVY SILVER AUTO, EVERY TIME I COME TO A STOP AT A STOP SIGN I AM EXPERIENCING UNWANTED ANTI-LOCK BRAKE SYSTEM APPLICATION. THIS HAPPENS EVERY TIME I STOP AND HAPPENS AT LOW SPEEDS ONLY. I HAVE FOUND THERE WAS A RECALL ON THIS SAME ISSUE ( NHTSA CAMPAIGN # 05V379000). THIS HOWEVER DOES NOT INCLUDE MY VEHICLE BUT IT NEEDS TO !! *TR
NHTSA ODI #10376437
46,900 miles · Jan 3, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 10 MPH AND DECELERATING, THE BRAKE PEDAL WENT TO THE FLOOR BOARD CAUSING AN INCREASE IN STOPPING DISTANCE AND TIME. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO INFORMED THE CONTACT THAT THE BRAKE LINE WAS RUSTED AND…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 10 MPH AND DECELERATING, THE BRAKE PEDAL WENT TO THE FLOOR BOARD CAUSING AN INCREASE IN STOPPING DISTANCE AND TIME. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO INFORMED THE CONTACT THAT THE BRAKE LINE WAS RUSTED AND LEAKING BRAKE FLUID. THE DEALER ADVISED THAT THE BRAKE LINES WOULD NEED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 46,900.
NHTSA ODI #10373929
100,000 miles · Dec 2, 2010
Service Brakes, Hydraulic
I'M COMPLAINING ABOUT MY 2001 CHEVROLET SILVERADO. THE WHEEL SPEED SENSOR MALFUNCTIONS, EVEN ON DRY ROADS, AND CAUSES LOSS OF BRAKES. IF THE ROADS ARE SLICK IT MALFUNCTIONS CONSTANTLY WHEN TRYING TO BRAKE, MAKING THE VEHICLE UNDRIVABLE. IT WAS FIXED UNDER RECALL ONCE ALREADY BUT HAPPENED AGAIN ONLY A YEAR LATER. THIS IS NOW THE …
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I'M COMPLAINING ABOUT MY 2001 CHEVROLET SILVERADO. THE WHEEL SPEED SENSOR MALFUNCTIONS, EVEN ON DRY ROADS, AND CAUSES LOSS OF BRAKES. IF THE ROADS ARE SLICK IT MALFUNCTIONS CONSTANTLY WHEN TRYING TO BRAKE, MAKING THE VEHICLE UNDRIVABLE. IT WAS FIXED UNDER RECALL ONCE ALREADY BUT HAPPENED AGAIN ONLY A YEAR LATER. THIS IS NOW THE 3RD WHEEL SPEED SENSOR ISSUE WITH MY VEHICLE. I'VE HAD TO PUT UP WITH IT SINCE CHEVROLET WON'T FIX IT AT THEIR EXPENSE EVEN THOUGH IT'S AN ONGOING RECALLED SAFETY ISSUE. I DON'T UNDERSTAND HOW THIS EXTREME SAFETY ISSUE IS ALLOWED TO CONTINUE LIKE THIS! *TR
NHTSA ODI #10368627
94,000 miles · Dec 1, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO K1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKING SYSTEM FAILED WITHOUT WARNING CAUSING THE CONTACT TO USE THE EMERGENCY BRAKES TO AVOID AN ACCIDENT. THE DEALER WAS CONTACTED AND STATED THAT THE WHEEL BEARINGS NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOTIFIED AND OFFERED NO…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO K1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKING SYSTEM FAILED WITHOUT WARNING CAUSING THE CONTACT TO USE THE EMERGENCY BRAKES TO AVOID AN ACCIDENT. THE DEALER WAS CONTACTED AND STATED THAT THE WHEEL BEARINGS NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOTIFIED AND OFFERED NO ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 94,000.
NHTSA ODI #10368487
NHTSA investigations
2EA04011 · Parking Brake Failure
Opened Apr 9, 2004 · Closed May 10, 2005
Status: closed (inferred from source dates) · Parking Brake; Parking Brake:conventional; Parking Brake:conventional:mechanical; Parking Brake:conventional:mechanical:linkage And Cable
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Additional source detail variants (4)
Parking Brake:conventional
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake:conventional:mechanical
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake:conventional:mechanical:linkage And Cable
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
Parking Brake
IN A LETTER DATED APRIL 20, 2005, GM NOTIFIED NHTSA THAT IT HAD DECIDED THAT DEFECTS THAT RELATE TO MOTOR VEHICLE SAFETY EXIST IN CERTAIN MODEL YEAR (MY) 1999-2002 C/K 1500 SERIES (PBR PARKING BRAKE SYSTEM) AND MY 2001-2005 C/K 2500 AND 3500 SERIES (TRW PARKING BRAKE SYSTEM) PICKUPS WITH MANUAL TRANSMISSIONS.ACCORDING TO GM, SOME OF THESE VEHICLES MAY HAVE CONDITIONS THAT CAUSE THE FRICTION LININGS TO WEAR TO AN EXTENT WHERE THE PARKING BRAKE CAN BECOME INEFFECTIVE IN IMMOBILIZING A PARKED VEHICLE.GM'S ACTION COVERS AN ESTIMATED TOTAL OF 142,585 VEHICLES.DEALERS WILL INSTALL A LOW-FORCE SPRING CLIP RETAINER FOR VEHICLES EQUIPPED WITH THE PBR PARKING BRAKE SYSTEM AND INSTALL A REDESIGNED PARKING BRAKE CABLE ASSEMBLY ON VEHICLES EQUIPPED WITH THE TRW PARKING BRAKE SYSTEM. A TOTAL OF 58 NON-DUPLICATIVE COMPLAINTS WERE RECEIVED BY ODI AND GM CONCERNING THE APPROXIMATELY 59,000 MY 1999-2002 C/K 1500 SERIES PICKUP TRUCKS WITH THE PBR PARKING BRAKE SYSTEM.THESE INCLUDED 22 ALLEGED ROLLAWAY INCIDENTS, RESULTING IN A RATE OF 38.5 ROLLAWAY INCIDENTS PER 100,000 VEHICLES.ODI IS AWARE OF 24 COMPLAINTS REGARDING THE MY 2001-2005 C/K 2500 AND 3500 SERIES MANUAL TRANSMISSION TRUCKS RECALLED BY GM, INCLUDING 5 ALLEGING ROLLAWAY INCIDENTS.THOUGH THE CONDITIONS DESCRIBED IN GM'S LETTER ARE ALSO PRESENT IN THE C/K TRUCKS WITH AUTOMATIC TRANSMISSIONS, THE ROLLAWAY RATE IN THOSE VEHICLES WAS SIMILAR TO THOSE OBSERVED IN PEER VEHICLES STUDIED BY ODI IN THIS INVESTIGATION.THIS ENGINEERING ANALYSIS IS CLOSED. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.
PE03057 · Parking Brake Failure
Opened Dec 8, 2003 · Closed Apr 9, 2004
Status: closed (inferred from source dates) · Parking Brake
ODI OPENED PE03-057 TO ASSESS PARKING BRAKE INEFFECTIVENESS IN THE SUBJECT VEHICLES.THESE VEHICLES ARE EQUIPPED WITH FOUR WHEEL DISC BRAKES THAT INCORPORATE A SINGLE-SHOE DRUM-IN-HAT PARKING BRAKE INDEPENDENT OF THE SERVICE BRAKES.COMPLAINT AND WARRANTY DATA INDICATE THAT THE PARKING BRAKE LININGS TEND TO WEAR OUT EARLY IN THE LIFE OF THE VEHICLE (AT AN AVERAGE OF 24 MONTHS IN SERVICE), REDUCING THE PARKING BRAKE SYSTEM'S TORQUE BELOW THAT NEEDED TO IMMOBILIZE THE VEHICLE.GM HAS ATTRIBUTED THIS ACCELERATED WEAR TO FOREIGN MATERIAL INTRUSION AND A FAILURE OF THE BRAKE SHOE TO PROPERLY SELF-CENTER WITHIN ITS BRAKE DRUM.EFFECTIVE WITH THE START OF MY 2003 PRODUCTION, A NEWER REDUCED FORCE HOLD-DOWN CLIP WAS INTRODUCED TO FACILITATE BRAKE SHOE DISENGAGEMENT FROM THE DRUM SURFACE.THIS PART IS ALSO AVAILABLE AT THE SERVICE LEVEL FOR THE MY 1999-2002 VEHICLES.GM HAS INDICATED THAT THE PAKING BRAKE IS INTENDED TO OPERATE IN CONJUNCTION WITH THE TRANSMISSION TO IMMOBILZE PARKED VEHICLES, AND THAT IN MANY CASES, ACCELERATED PARKING BRAKE LINING WEAR IS CAUSED BY ROUGH USE, VEHICLE MODIFICATIONS, AND DRIVING WITH THE PARKING ENGAGED. ODI HAS UPGRADED THE PRELIMINARY EVALUATION TO AN ENGINEERING ANALYSIS TO GATHER FURTHER INFORMATION CONCERNING PARKING BRAKE USAGE FACTORS AND THE CIRCUMSTANCES SURROUNDING THE SEVENTEEN REPORTED VEHICLE CRASHES.
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