NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
468 reports99,000 miles · Dec 1, 2009
Service Brakes, Hydraulic
I HAVE A 2001 CHEVROLET SILVERADO, AND THE ANTI-LOCK BRAKES COME ON ALMOST ALL THE TIME WHEN I AM BRAKING AT ABOUT 5 MPH. THERE IS A RECALL FOR THIS PROBLEM, BUT CHEVROLET SAYS MY VIN NUMBER IS NOT INCLUDED IN THE RECALL. THE RECALL IS JUST FOR CERTAIN STATES, INDIANA (WHERE I LIVE) BEING ONE OF THEM. CHEVROLET DOES NOT WANT …
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I HAVE A 2001 CHEVROLET SILVERADO, AND THE ANTI-LOCK BRAKES COME ON ALMOST ALL THE TIME WHEN I AM BRAKING AT ABOUT 5 MPH. THERE IS A RECALL FOR THIS PROBLEM, BUT CHEVROLET SAYS MY VIN NUMBER IS NOT INCLUDED IN THE RECALL. THE RECALL IS JUST FOR CERTAIN STATES, INDIANA (WHERE I LIVE) BEING ONE OF THEM. CHEVROLET DOES NOT WANT TO FIX THE PROBLEM BECAUSE MY VIN NUMBER IS NOT ONE THAT IS COVERED UNDER THE RECALL. I HAVE READ SEVERAL OTHER COMPLAINTS ABOUT THE SAME THING, SO THERE MUST BE SOME KIND OF DEFECT. MY TRUCK STARTED HAVING THE PROBLEM AT ABOUT 99,000 MILES. *TR
NHTSA ODI #10294167
59,021 miles · Nov 25, 2009
Service Brakes, Hydraulic
ON A SATURDAY 11/21/2009 I WAS DRIVING MY 201 CHEVROLET SILVERADO {59,021 MILES} DOWN A DIRT INCLINE WHICH LEADS TO A POND.WHEN I APPLIED THE BRAKES ,THERE WERE NO BRAKES AT ALL, AND I KEEP GOING WHILE MY FOOT WAS HOLDING THE BRAKES DOWN , UNTIL MY TRUCK'S FRONT TIRES WERE IN THE PONDS WATER. AS I ENTERED THE WATER THE BRAKES F…
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ON A SATURDAY 11/21/2009 I WAS DRIVING MY 201 CHEVROLET SILVERADO {59,021 MILES} DOWN A DIRT INCLINE WHICH LEADS TO A POND.WHEN I APPLIED THE BRAKES ,THERE WERE NO BRAKES AT ALL, AND I KEEP GOING WHILE MY FOOT WAS HOLDING THE BRAKES DOWN , UNTIL MY TRUCK'S FRONT TIRES WERE IN THE PONDS WATER. AS I ENTERED THE WATER THE BRAKES FINALLY TOOK HOLD AND I STOPPED. IT WAS A BEAUTIFUL CLEAR DAY WITHOUT ANY ICE OR SNOW. THIS IS THE SECOND TIME IT HAS HAPPENED~ THE FIRST WAS ABOUT 11/2003 I WAS HAVING BRAKE PROBLEMS {THE BRAKES WOULD CHATTER WHEN APPLIED}SO I BROUGHT THE TRUCK TO A CHEVROLET DEALER TO CK. THE BRAKES THIS WAS ON 12/01/2003. THE SERVICE DEPARTMENT CALLED A FEW DAYS LATER AND SAID THE MECHANIC HAD A ACCIDENT WITH THE TRUCK, HE WAS BRING IT INTO THE GARAGE AND HE HAD GONE RIGHT THROUGH THE CLOSED GARAGE DOORS BECAUSE OF A BRAKE FAILURE. THE DEALER AT THIS POINT CALLED GENERAL MOTORS AND REPORTED THE PROBLEM WITH THE BRAKES {NOT STOPPING & GOING THROUGH THE CLOSED DOORS}DAMAGE WAS DONE AND THEY HAD TO REPLACE THE BUG DEFLECTOR,BUMPER CAP , FRONT GRILL & REPAIRED AND PAINTED THE HOOD. THEY ALSO REPLACED THE ~WHEEL SENSORS ~TELLING US THAT THIS WAS THE PROBLEM. WE HAD NO USE OF THE TRUCK FOR ABOUT 6WK. THE TRUCK WAS RETURNED TO US WITHOUT CHARGE. WERE AFRAID TO DRIVE THIS TRUCK NOW FEARING SOMEONE WILL BE INJURED OR KILLED BECAUSE WE ARE NEVER SURE WHEN THIS BRAKE FAILURE WILL HAPPEN AGAIN. WE HAVE CALLED GM THEY MADE AN APPOINTMENT WITH A CHEVROLET DEALER BUT THEY REFUSED TO PAY FOR THE DIAGNOSTIC TEST TO CONFIRM THE BRAKE FAILURE . *TR
NHTSA ODI #10293605
100,670 miles · Oct 19, 2009
Service Brakes, ElectricCrashInjury
I FIRST RECEIVED RECALL NOTICE FOR ABS BRAKE SYSTEM ON 2001 CHEVROLET SILVERADO IN 2005. IMMEDIATELY TOOK VEHICLE TO DEALERSHIP ON 11/1/05 AND HAD BRAKES "FIXED", WHICH WAS SIMPLY CLEANING THE ABS SPEED SENSOR. MILEAGE WAS 61,911. THEN ON 9/11/09 MY WIFE WAS PULLING INTO A PARKING SPACE AT OUR SUPERMARKET AT LOW SPEED (3-4 MI…
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I FIRST RECEIVED RECALL NOTICE FOR ABS BRAKE SYSTEM ON 2001 CHEVROLET SILVERADO IN 2005. IMMEDIATELY TOOK VEHICLE TO DEALERSHIP ON 11/1/05 AND HAD BRAKES "FIXED", WHICH WAS SIMPLY CLEANING THE ABS SPEED SENSOR. MILEAGE WAS 61,911. THEN ON 9/11/09 MY WIFE WAS PULLING INTO A PARKING SPACE AT OUR SUPERMARKET AT LOW SPEED (3-4 MILES PER HOUR). BRAKES FAILED AND TRUCK CONTINUED FORWARD AND STRUCK THE FRONT OF A PARKED VEHICLE, WHICH IN TURN WAS PUSHED BACKWARD HITTING A WOMAN PUTTING GROCERIES IN HER TRUNK. THE WOMAN WAS KNOCKED TO THE GROUND AND MAY HAVE BEEN INJURED. TOOK TRUCK TO THE DEALERSHIP IMMEDIATELY AND THEY AGAIN "FIXED" BRAKES. THIS TIME IT WAS AT MY EXPENSE OF $447. MILEAGE WAS 100,670. GM HAS NOT SUFFICIENTLY ADDRESSED THIS RECALL CAMPAIGN. FIRST, THE RECALL "FIX" WAS ACTUALLY JUST A BAND-AID TO TEMPORARILY RESOLVE THE PROBLEM AND NOT A ROOT-CAUSE SOLUTION. THERE WAS NO SERVICE BULLETIN OR COMMUNICATION TO OWNERS THAT THIS SERVICE NEEDED TO BE DONE AGAIN EVERY FEW YEARS (AT OWNERS EXPENSE) OR THE BRAKE FAILURE AT LOW SPEED ISSUE WOULD RETURN AGAIN. *TR
NHTSA ODI #10288917
113,000 miles · Oct 14, 2009
Tires
TL*THE CONTACT OWNS A 2001 CHEVY SILVERADO 1500. WHILE DRIVING 70 TO 75 MPH THE VEHICLE BEGAN SHAKING AND THEN THE REAR PASSENGER SIDE TIRE BLEW OUT CAUSING DAMAGE TO THE BACK QUARTER PANEL. A TOW TRUCK DRIVER REPLACED THE TIRE WITH A SPARE TIRE. THE REAR QUARTER PANEL OF THE VEHICLE WAS ALSO REPAIRED. TWO MONTH LATER, THE DRIVE…
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TL*THE CONTACT OWNS A 2001 CHEVY SILVERADO 1500. WHILE DRIVING 70 TO 75 MPH THE VEHICLE BEGAN SHAKING AND THEN THE REAR PASSENGER SIDE TIRE BLEW OUT CAUSING DAMAGE TO THE BACK QUARTER PANEL. A TOW TRUCK DRIVER REPLACED THE TIRE WITH A SPARE TIRE. THE REAR QUARTER PANEL OF THE VEHICLE WAS ALSO REPAIRED. TWO MONTH LATER, THE DRIVER SIDE REAR TIRE BLEW OUT CAUSING DAMAGE TO THE FENDER ABOVE THE WHEEL. THE TIRE DEALER THAT THE CONTACT PURCHASED THE TIRES FROM CONFIRMED THAT THERE WERE NO EXISTING RECALLS. THE CONTACT HAS NOT NOTIFIED THE MANUFACTURER AND THE VEHICLE HAS NOT BEEN REPAIRED. THE CURRENT AND FAILURE MILEAGES WERE 113,000.
NHTSA ODI #10287355
90,500 miles · Oct 13, 2009
Service Brakes, Hydraulic
SUDDEN AND NEAR TOTAL LOSE OF BRAKES. THE CHEVROLET DEALER REPORTED THAT THE BRAKE LINES HAD RUSTED OUT AND RUPTURED. ALL BRAKE LINES HAD TO BE REPLACED. IF THIS HAD OCCURRED AT HIGHWAY SPEEDS IN AN EMERGENCY SITUATION THERE COULD HAVE BEEN A VERY SERIOUS ACCIDENT. *TR
NHTSA ODI #10287191
87,057 miles · Aug 22, 2009
Fuel System, Other
FUEL GAUGE DOES NOT WORK PROPERLY, IT SHOWS RANDOM FUEL AMOUNTS. IT HAS LEFT ME OUT OF GAS SEVERAL TIMES. ALL MY FAMILY DRIVES SILVERADOS AND GMC SIERRA, AND ALL HAVE THE SAME PROBLEM. THIS IS VERY DANGEROUS, WHAT IF I RUN OUT OF FUEL ON THE HIGH AND MY TRUCK STALLS AND CAUSES AN ACCIDENT. *TR
NHTSA ODI #10281374
940,000 miles · Aug 19, 2009
Air BagsService Brakes, Hydraulic
HYDRAULIC BRAKE LINE ROTTED OUT CAUSING ME TO LOOSE MY BRAKES. HAPPEN ON THE HIGHWAY. ALMOST REAR END THE CAR IN FRONT OF ME. DEALER SAYS THIS IS NORMAL WEAR DUE SALT ON THE ROADS. 2001 CHEVY SILVERADO 1500. 93,000 MILES. *TR
NHTSA ODI #10280975
156,458 miles · Aug 11, 2009
Tires
SPARE TIRE HOLDING CABLE BROKE OFF AFTER HITTING A POTHOLE. TIRE FLEW OFF OF TRUCK INTO ONCOMING TRAFFIC. *TR
NHTSA ODI #10280087
39,000 miles · Jun 2, 2009
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH, UNWANTED ANTILOCK BRAKE SYSTEM (ABS) ACTIVATION OCCURRED. THE CONTACT CALLED THE MANUFACTURER IN REFERENCE TO NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) AND WAS INFORMED THAT THE VIN WAS EXCLUDED FROM THE RECALL. THE CONTACT…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH, UNWANTED ANTILOCK BRAKE SYSTEM (ABS) ACTIVATION OCCURRED. THE CONTACT CALLED THE MANUFACTURER IN REFERENCE TO NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) AND WAS INFORMED THAT THE VIN WAS EXCLUDED FROM THE RECALL. THE CONTACT WOULD BE RESPONSIBLE FOR THE REPAIRS AND IS IN THE PROCESS OF HAVING THE VEHICLE INSPECTED BY AN AUTHORIZED DEALER. THE FAILURE AND CURRENT MILEAGES WERE 39,000.
NHTSA ODI #10272633
75,000 miles · May 28, 2009
Equipment
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT HAD TO REPLACE THE TIRE HOLDER UNDERNEATH HIS VEHICLE AFTER IT FAILED. AS A RESULT, THE SPARE TIRE ROLLED ONTO THE ROAD. THE REPLACEMENT HOLDER FAILED APPROXIMATELY ONE YEAR LATER. THE CONTACT HAS HAD TO PLACE SPARE TIRES IN THE BACK OF HIS VEHICLE. THE ROAD C…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT HAD TO REPLACE THE TIRE HOLDER UNDERNEATH HIS VEHICLE AFTER IT FAILED. AS A RESULT, THE SPARE TIRE ROLLED ONTO THE ROAD. THE REPLACEMENT HOLDER FAILED APPROXIMATELY ONE YEAR LATER. THE CONTACT HAS HAD TO PLACE SPARE TIRES IN THE BACK OF HIS VEHICLE. THE ROAD CONDITIONS WERE NORMAL AT THE TIME OF THE FAILURES. THE VIN WAS UNKNOWN. THE CURRENT MILEAGE WAS 107,000 AND FAILURE MILEAGE WAS 75,000.
NHTSA ODI #10270206
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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