NHTSA owner reports · September 18, 2026 snapshot.
Parking Brake complaints
29 reportsClear category filter21,000 miles · Sep 24, 2004
Parking Brake
PARKING BRAKES ON A 2001 CHEVROLET SILVERADO. I HAVE 42000 MILES AND THIS IS THE SECOND TIME THE PARKING BRAKES WORE OUT PREMATURALLY. HAVE NEVER BEEN ABUSED AND USE NORMALLY. THE FIRST TIME AROUND AT 21000 MILES. PARKING BRAKES LINNING ARE WORN BEYOND RECOMMENDED THICKNESS AND CANNOT HOLD THE VEHICLE. FIRST TIME I REPLACED THE …
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PARKING BRAKES ON A 2001 CHEVROLET SILVERADO. I HAVE 42000 MILES AND THIS IS THE SECOND TIME THE PARKING BRAKES WORE OUT PREMATURALLY. HAVE NEVER BEEN ABUSED AND USE NORMALLY. THE FIRST TIME AROUND AT 21000 MILES. PARKING BRAKES LINNING ARE WORN BEYOND RECOMMENDED THICKNESS AND CANNOT HOLD THE VEHICLE. FIRST TIME I REPLACED THE LINNINGS AND WILL AGAIN HAVE TO PLACE THE LININGS. NEVER TOLD ABOUT PREMATURE LINING FAILURE WHEN I PURCHASED THE FIRST SET.I DON'T BELIVE PARKING BRAKE LINING SHOULD WEAR OUT AT 20000 MILES.*AK
NHTSA ODI #10093158
70,000 miles · Sep 22, 2004
Engine And Engine CoolingExterior LightingParking BrakeInjury
PARKING BRAKE, DAY TIME RUNNING LIGHTS, O2 SENSOR, UEL GAUGE . *AK
NHTSA ODI #10093032
20,000 miles · May 21, 2004
Engine And Engine CoolingExterior LightingParking Brake
PARKING BRAKE HASN'T WORKED SINCE AROUND 20000 MILES, BRAKE WILL DEPRESS, BUT WON'T KEEP TRUCK FROM ROLLING. LOUD PISTON SLAP, KNOCKING FROM ENGINE MOSTLY WHEN ENGINE IS COLD, GOES AWAY AFTER WARMED UP. THIS IS A Z71 AND THE 4 WHEEL DRIVE BUTTONS DO NOT WORK ALL THE TIME WHEN TRYING TO PUT INTO 4 WHEEL DRIVE. POWER MIRRORS DON'T…
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PARKING BRAKE HASN'T WORKED SINCE AROUND 20000 MILES, BRAKE WILL DEPRESS, BUT WON'T KEEP TRUCK FROM ROLLING. LOUD PISTON SLAP, KNOCKING FROM ENGINE MOSTLY WHEN ENGINE IS COLD, GOES AWAY AFTER WARMED UP. THIS IS A Z71 AND THE 4 WHEEL DRIVE BUTTONS DO NOT WORK ALL THE TIME WHEN TRYING TO PUT INTO 4 WHEEL DRIVE. POWER MIRRORS DON'T WORK A LOT OF THE TIME. AT LEAST ONE OF THE FRONT RUNNING LIGHTS STAY BURNED OUT MOST OF THE TIME. TRUCK IS OUT OF WARRANTY NOW BUT THESE PROBLEMS HAVE EXISTED FOR A LONG TIME. A LOT OF OTHER TRUCKS OF THIS SAME MODEL HAVE ALL THE SAME PROBLEMS. GM SHOULD ADDRESS THESE PROBLEMS AND MAKE THEM RIGHT AT NO COST TO THE CONSUMER.*AK
NHTSA ODI #10072959
30,000 miles · Mar 11, 2004
Parking Brake
PARKING BRAKE DOES NOT HOLD. ABOUT A YEAR TO 18 MONTHS AFTER THE VEHICLES (2001 Z71 CHEVERLET AND 2002 SURBUBAN) THE PARK BRAKE FAILS TO HOLD. AS TIME WENT ON, THE PARKING BRAKE PEDEL NEEDED TO BE DEPRESSED LOWER AND LOWER UNTIL THE BRAKE WOULD NO LONGER HOLD THE VEHICLE.*AK
NHTSA ODI #10061923
17,000 miles · Jan 17, 2004
Electrical SystemFuel System, OtherParking BrakeCrashInjury
WE PURCHASED A 2001 SILVERADO EXT IN 7-01. TRUCK HAD ABOUT 16,000 MILES ON IT, WHEN WE BOUGHT IT NEW/USED. PARKING BRAKE SEEMED TO BE REALLY SOFT, BUT LOT ASSURED US, NOTHING WAS WRONG WITH IT AND THAT THE NEW TECHNOLOGY WE HAD WITH VEHICLE'S, MADE IT EASIER FOR ELDERLY PEOPLE AND SUCH. YES THE BRAKE WORKS GREAT ON LEVEL GROUND,…
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WE PURCHASED A 2001 SILVERADO EXT IN 7-01. TRUCK HAD ABOUT 16,000 MILES ON IT, WHEN WE BOUGHT IT NEW/USED. PARKING BRAKE SEEMED TO BE REALLY SOFT, BUT LOT ASSURED US, NOTHING WAS WRONG WITH IT AND THAT THE NEW TECHNOLOGY WE HAD WITH VEHICLE'S, MADE IT EASIER FOR ELDERLY PEOPLE AND SUCH. YES THE BRAKE WORKS GREAT ON LEVEL GROUND, BUT WAIT UNTIL YOU REALLY NEED IT LIKE ON A SLOPED DRIVEWAY............. OR GETTING THE VEHICLE INSPECTED! THIS IS WHEN THEY REALLY GIVE YOU THE WORKS!!DEALERSHIP WANTED TO CHARGE US ALMOST $200 TO FIX A 15 MINUTE JOB, WHICH SHOULD HAVE BEEN FIXED WHILE IT WAS UNDER WARRANTY. WE HAD AN UNFORTUNATE INCIDENT, WHICH RESULTED IN THE DEATH OF ANOTHER PERSON. TO MAKE A LONG STORY SHORT, I FEEL IT MAY HAVE BEEN PREVENTED, IF THESE(SO CALLED) GREAT ANTI-LOCK BRAKES ON GM VEHICLES DID WHAT THEY ARE SUPPOSED TO DO. WE HAVE ENCOUNTERED SEVERAL OCCASIONS WHERE THE BRAKES GO TO THE FLOOR, GET REALLY SPONGY, EVEN WHEN CONSTANT PRESSURE ON PEDAL IS MAINTAINED, AND THE RESULT IS ERRATIC! WHAT HAPPENED TO THE GMC/CHEVROLET BRAND?! ----P.S.- WE WERE TOLD THIS IS A COMMON COMPLAINT ON THE PARKING BRAKE, BUT YET THERE IS NO RECALL ON A SAFETY DEFECT?! BY THE WAY, GM THIS IS THE LAST VEHICLE PURCHASE WE WILL MAKE FROM YOU. IT SEEMS THE QUALITY AND SAFETY FACTOR MEAN NOTHING TO YOUR COMPANY ANYMORE, WITHOUT TRYING TO MAKE MORE MONEY FROM THE CONSUMER...OH WELL, JUST ONE LESS CUSTOMER!! *CB
NHTSA ODI #10054335
12,000 miles · Jan 1, 2004
Electrical SystemEngine And Engine CoolingParking Brake
NOTHING BUT PROBLEMS WITH TRUCK. FIRST WAS THE SLIP YOKE IN THE DRIVE SHAFT, FELT LIKE TRANNY WAS SLIPPING FROM TAKE OFF AT START POSITION. REPLACED UNDER WARRANTY.*AK ANTI-LOCK BRAKES WOULD COME ON WITH EVERY STOP. USUALLY AT VERY SLOW SPEEDS, CAUSING TRUCK TO EXCEED 5-10 FT FURTHER THAN IT SHOULD HAVE. HAD FRONT WHEEL …
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NOTHING BUT PROBLEMS WITH TRUCK. FIRST WAS THE SLIP YOKE IN THE DRIVE SHAFT, FELT LIKE TRANNY WAS SLIPPING FROM TAKE OFF AT START POSITION. REPLACED UNDER WARRANTY.*AK ANTI-LOCK BRAKES WOULD COME ON WITH EVERY STOP. USUALLY AT VERY SLOW SPEEDS, CAUSING TRUCK TO EXCEED 5-10 FT FURTHER THAN IT SHOULD HAVE. HAD FRONT WHEEL BEARING REPLACED, FIXED FOR SOME TIME DOING IT AGAIN. ALSO IN THE MEAN TIME, HAD TO HAVE ALL BRAKES AND ROTORS REPLACED. BRAKE SYSTEM IS AWFUL. THIS COULD CAUSE ACCIDENTS. ALSO, HAS COLD ENGINE KNOCK, VERY LOUD KNOCK, NOT A NORMAL KNOCK. SOMETHING ISNT RIGHT WITH THIS. DONE THIS SINCE A LITTLE OVER 20,000 MILES, WORSE WHEN TEMPERATURES OUTSIDE ARE LOW. HAD TO HAVE 4X4 SWITCH ON DASH REPLACED. KEPT GETTING SERVICE 4WD UNIT. OUT OF WARRANTY AT THIS TIME. I KNOW OF AT LEAST 4 OTHER WITH ALL SAME PROBLEMS. STILL NOTHING DONE WITH GM, SOMETHING SHOULD BE DONE. ESPECIALLY WITH THE BRAKE SYSTEM. SAFETY HAZARD.
NHTSA ODI #10051467
40,000 miles · Sep 9, 2003
Parking Brake
CHEVROLET HAS A DEFECTIVE CLIP THAT IS ON THIER EMERGENCY BRAKE SYSTEM AND THEY KNOW THIS BUT ARE NOT DOING A RECALL TO TRY AND SOLVE THIS PROBLEM. THERE IS A TECHNICAL SERVICE BULLETIN OUT ON THIS PROBLEM BUT THEY STILL ARE NOT ACCEPTING FAULT AND ARE MAKING THE CONSUMER PAY FOR THIER MISTAKE. AFTER REPEATED PHONE CALLS TO THEM…
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CHEVROLET HAS A DEFECTIVE CLIP THAT IS ON THIER EMERGENCY BRAKE SYSTEM AND THEY KNOW THIS BUT ARE NOT DOING A RECALL TO TRY AND SOLVE THIS PROBLEM. THERE IS A TECHNICAL SERVICE BULLETIN OUT ON THIS PROBLEM BUT THEY STILL ARE NOT ACCEPTING FAULT AND ARE MAKING THE CONSUMER PAY FOR THIER MISTAKE. AFTER REPEATED PHONE CALLS TO THEM I DID GET THEM TO AGREE TO PAY FOR HALF OF THE FIX ON MY 1/2 TON PICK-UP. MY QUESTION IS WHY IS NOTHING BEING DONE ABOUT THIS PROBLEM? IT IS NOT SO MUCH THE MONEY I HAD TO PUT OUT OF POCKET BUT THE FACT THEY KNOW THERE IS A PROBLEM ON ALL OF THIER TRUCKS MADE AFTER 1999.*AK
NHTSA ODI #10037506
54,500 miles · Jul 8, 2003
Parking Brake
MY 2001 CHEVROLET C1500 SILVERADO IS TWO YEARS OLD AND DUE IT'S FIRST STATE INSPECTION. THE TRUCK WOULD NOT PASS BECAUSE THE EMERGENCY BRAKE WOULD NOT STOP THE TRUCK, EVEN SITTING STILL AT IDLE. THE EMERGENCY BRAKE HAS NEVER BEEN USED, BUT BOTH EMERGENCY BRAKE SHOES WERE WORN OUT AND ONE ROTOR/DRUM WAS RUINED. *AK
NHTSA ODI #10025609
Mileage unknown · Sep 25, 2001
Parking Brake
VEHICLE WAS PARKED, PRESSED PARKING BRAKE AND BRAKES WENT ALL THE WAY TO THE FLOOR. CONSUMER CONTACTED DEALER, AND THEY STATED THAT IT WAS NORMAL. *AKTHE CONSUMER CHECKED SEVERAL OTHER GM TRUCKS AND FOUND THAT SOME OF THEIR PARKING BRAKES ALSO GO TO THE FLOOR, THE CONSUMER IS CONCERNED THAT WHEN ADJUSTMENT IS NEEDED THE ADJUST…
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VEHICLE WAS PARKED, PRESSED PARKING BRAKE AND BRAKES WENT ALL THE WAY TO THE FLOOR. CONSUMER CONTACTED DEALER, AND THEY STATED THAT IT WAS NORMAL. *AKTHE CONSUMER CHECKED SEVERAL OTHER GM TRUCKS AND FOUND THAT SOME OF THEIR PARKING BRAKES ALSO GO TO THE FLOOR, THE CONSUMER IS CONCERNED THAT WHEN ADJUSTMENT IS NEEDED THE ADJUSTMENT RODS WILL HAVE NO ADJUSTMENT LEFT, THE CONSUMER BELIEVES THAT THE WRONG CABLE LENGTH WAS USED EITHER FRONT OR REAR. *NLM
NHTSA ODI #896827
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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