NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
164 reportsClear category filter40,800 miles · Jun 15, 2015
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING AT 5 MPH, THE ANTILOCK BRAKE SYSTEM WOULD ACTIVATE INDEPENDENTLY. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE WHEEL SPEED SENSOR MOUNTING SURFACE NEEDED TO BE CLEANED AND REINSTALLED. THE VEHICL…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING AT 5 MPH, THE ANTILOCK BRAKE SYSTEM WOULD ACTIVATE INDEPENDENTLY. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE WHEEL SPEED SENSOR MOUNTING SURFACE NEEDED TO BE CLEANED AND REINSTALLED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 40,800.
NHTSA ODI #10725363
160,000 miles · Oct 6, 2014
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS, THE ANTILOCK BRAKE SYSTEM ACTIVATED AUTOMATICALLY AND THE ANTILOCK BRAKE SYSTEM WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS NOT DIAGNOSED, BUT WAS REPAIRED BY THE CONTACT WHO REMOVED THE ANTILOCK BRAKE SYSTEM SENSOR. THE MANUFACTURER WAS NOTIF…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS, THE ANTILOCK BRAKE SYSTEM ACTIVATED AUTOMATICALLY AND THE ANTILOCK BRAKE SYSTEM WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS NOT DIAGNOSED, BUT WAS REPAIRED BY THE CONTACT WHO REMOVED THE ANTILOCK BRAKE SYSTEM SENSOR. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 160,000.
NHTSA ODI #10641762
7,221 miles · May 16, 2014
Service Brakes, Hydraulic
I HAVE OWNED THIS TRUCK FROM NEW. IT IS USED FOR LIMITED HAULING DUTIES AROUND TOWN AND HAS VERY LOW MILEAGE. LAST SUMMER I TOOK IT TO THE CHEVROLET DEALER FOR PA STATE INSPECTION. THE MECHANIC DROVE THE CAR INTO THE SERVICE BAY AND UPON DOING SO, THE BRAKE FLUID DUMPED OUT SUDDENLY FROM BENEATH THE TRUCK CHASSIS. THIS WAS 10 MI…
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I HAVE OWNED THIS TRUCK FROM NEW. IT IS USED FOR LIMITED HAULING DUTIES AROUND TOWN AND HAS VERY LOW MILEAGE. LAST SUMMER I TOOK IT TO THE CHEVROLET DEALER FOR PA STATE INSPECTION. THE MECHANIC DROVE THE CAR INTO THE SERVICE BAY AND UPON DOING SO, THE BRAKE FLUID DUMPED OUT SUDDENLY FROM BENEATH THE TRUCK CHASSIS. THIS WAS 10 MIN AFTER I DROVE THE TRUCK TO THE DEALERS USING A LOCAL EXPRESSWAY. THE TRUCK WAS THEN PUT UP ON THE LIFT AND I WAS SHOWN THE FACT THAT THE BRAKE LINES WERE SEVERELY CORRODED TO THE POINT THAT THE BRAKE FLUID WAS DUMPED ONTO THE FLOOR. I PAID $2332 FOR BRAKE REPAIRS. AS A GRADUATE MATERIALS ENGINEER I INQUIRED AS TO THE MATERIAL USED FOR THE BRAKE LINES AND WAS TOLD THEY WERE CARBON STEEL. IT OFFENDS ME GREATLY THAT THIS TRUCK HAD THIS SEVERE FAILURE WITH LESS THAN 10K MILES, AND THAT GM APPARENTLY HAS BEEN AWARE OF THE PROBLEM AND HIDDEN IT FOR MANY YEARS. THEIR FOCUS ON SAVING A BUCK COULD HAVE COST LIVES AS A RESULT. THE DEALER WAS NOT HELPFUL IN MAKING ME AWARE OF ANY MITIGATION PROGRAM BY GM. AND I AM STUCK WITH A LARGE BILL FOR THEIR NEGLIGENCE. I AM APPALLED AND AN UNHAPPY CUSTOMER!!!
NHTSA ODI #10596137
16,233 miles · Oct 31, 2013
Service BrakesService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE INSPECTING THE VEHICLE, HE NOTICED THE BRAKE LINES WERE CORRODED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 16,233. UPDATED 12/24/13*LJ
NHTSA ODI #10550386
120,000 miles · Sep 19, 2013
Service BrakesService Brakes, Hydraulic
THIS COMPLAINT RELATES TO NHTSA ACTION NUMBER EA11001 REGARDING CORRODED BRAKE LINES ON CHEVY TRUCKS. I WAS COMING UP TO A RED LIGHT, SOME CARS AHEAD OF ME, GOING ABOUT 30 MPH. I APPLIED THE BRAKES. INITIAL PRESSURE ON THE PEDAL FELT NORMAL, THEN THE PEDAL RESISTANCE DROPPED TO ZERO. BY PUSHING THE PEDAL ALL THE WAY TO THE F…
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THIS COMPLAINT RELATES TO NHTSA ACTION NUMBER EA11001 REGARDING CORRODED BRAKE LINES ON CHEVY TRUCKS. I WAS COMING UP TO A RED LIGHT, SOME CARS AHEAD OF ME, GOING ABOUT 30 MPH. I APPLIED THE BRAKES. INITIAL PRESSURE ON THE PEDAL FELT NORMAL, THEN THE PEDAL RESISTANCE DROPPED TO ZERO. BY PUSHING THE PEDAL ALL THE WAY TO THE FLOOR I WAS ABLE TO STOP THE VEHICLE. I PULLED IN TO A GAS STATION. BRAKE FLUID WAS POURING OUT OF A LOCATION ALONG THE BRAKE LINE RUNNING TO THE BACK OF THE VEHICLE. LOCATION ABOUT WHERE THE CAB AND BED MEET. I WAS ABLE TO DRIVE SLOWLY TO A NEARBY CHEVY DEALER FOR REPAIRS. TOTAL REPAIR BILL WAS $2200. *TR
NHTSA ODI #10544430
91,000 miles · Jun 25, 2013
Service BrakesService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 5 MPH, THE BRAKES WERE APPLIED AND THE ANTI LOCK BRAKE SYSTEM ENGAGED INDEPENDENTLY. THE CONTACT MENTIONED THAT THE FAILURE RECURRED ON AN INTERMITTENT BASIS. THE VEHICLE WAS NOT TAKEN TO A DEALER FOR DIAGNOSTIC TESTING. THE…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 5 MPH, THE BRAKES WERE APPLIED AND THE ANTI LOCK BRAKE SYSTEM ENGAGED INDEPENDENTLY. THE CONTACT MENTIONED THAT THE FAILURE RECURRED ON AN INTERMITTENT BASIS. THE VEHICLE WAS NOT TAKEN TO A DEALER FOR DIAGNOSTIC TESTING. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND STATED THAT THE VEHICLE WAS REPAIRED PREVIOUSLY UNDER NHTSA CAMPAIGN NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC). THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 91,000 AND THE CURRENT MILEAGE WAS 93,000. *TR
NHTSA ODI #10521758
57,856 miles · Jul 23, 2012
Power TrainService Brakes, Hydraulic
I WENT TO STOP AT STREET LIGHT AND THE BRAKE WENT TO THE FLOOR NO BRAKES AT ALL. LATER FOUND BRAKES LINES RUSTED THREW. ALL TRANSMISSION LINES ALSO RUST THREW. PRICE TO HAVE FIXED OVER $2000.00 *TR
NHTSA ODI #10467487
54,000 miles · Jun 15, 2012
Service BrakesService Brakes, Hydraulic
WHILE DRIVING, THE VEHICLE OPERATOR EXPERIENCED COMPLETE BRAKE FAILURE--VEHICLE WAS TOWED TO NEAREST CHEVROLET DEALER AND IS NOW AWAITING "NEW " BRAKE LINE INSTALLATION. I HAVE BEEN TOLD THAT THE ENTIRE BRAKING SYSTEM HAS CORRODED AND WILL NEED TO BE REPLACED. *JB
NHTSA ODI #10461852
126,997 miles · Feb 28, 2012
Service Brakes, Hydraulic
DURING BRAKING FROM 35MPH TO MAKE A RIGHT TURN MY BRAKE PEDAL WENT TO THE FLOOR. THE TRUCK DID NOT SLOW DOWN ENOUGH TO MAKE THE TURN, I DROVE DOWN A BLOCK TO THE NEXT INTERSECTION AND USED MY PARKING BRAKE TO COMPLETE MY STOP. I PARKED THE TRUCK AND IMMEDIATELY NOTICED FLUID FROM THE BRAKE LINE LEAKING OUT ON GROUND IN THE AREA …
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DURING BRAKING FROM 35MPH TO MAKE A RIGHT TURN MY BRAKE PEDAL WENT TO THE FLOOR. THE TRUCK DID NOT SLOW DOWN ENOUGH TO MAKE THE TURN, I DROVE DOWN A BLOCK TO THE NEXT INTERSECTION AND USED MY PARKING BRAKE TO COMPLETE MY STOP. I PARKED THE TRUCK AND IMMEDIATELY NOTICED FLUID FROM THE BRAKE LINE LEAKING OUT ON GROUND IN THE AREA JUST BELOW WHERE THE DRIVERS FEET ARE. THE LINE IS A RIGID STEEL LINE IN A GROUP WITH 3 OTHERS THAT RUN FROM THE ABS CONTROL UNIT FORWARD AND ALL OF THESE STEEL LINES ARE SEVERELY CORRODED PARTICULARLY IN THE AREA OUTSIDE OF THE FRAME WHERE THE LINE HAS RUPTURED. MY TRUCK IS A CHEVROLET 1500 Z71 WITH 126,000 MILES AND HAS BEEN WELL MAINTAINED SINCE I HAVE OWNED IT. I FEEL THAT THIS ISSUE IS EXTREMELY DANGEROUS AND HAVE FOUND THAT THERE ARE MANY OTHERS WITH RUSTED AND RUPTURED BRAKES ON THEIR CHEVY TRUCKS. OTHER PEOPLE WERE NOT AS FORTUNATE AS ME BECAUSE MY SON AND I MADE IT HOME AND WE WERE UNHARMED. I FEEL THAT IT IS IMPERATIVE EVERYONE WHO OWNS A CHEVY TRUCK OF SIMILAR MODEL YEAR BE ALERTED AND WARNED OF THIS POTENTIALLY DEADLY AND DANGEROUS BRAKE PROBLEM. *TR
NHTSA ODI #10449514
105,000 miles · Feb 17, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE THE BRAKES WERE DEPRESSED, THE BRAKE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE MECHANIC CONFIRMED HAT THE BRAKE LINE HAD RUPTURED. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS REPAIRED. THE FAILURE M…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE THE BRAKES WERE DEPRESSED, THE BRAKE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE MECHANIC CONFIRMED HAT THE BRAKE LINE HAD RUPTURED. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 105,000 AND THE CURRENT MILEAGE WAS 110,00.
NHTSA ODI #10448302
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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