NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter50,000 miles · Dec 16, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. ON SEVERAL OCCASIONS, THE CONTACT HAS EXPERIENCED FAILURES WITH THE BRAKE SYSTEM. THE INITIAL FAILURE BEGAN WHEN HE WOULD APPLY THE BRAKES AND THE BRAKE INDICATOR WOULD ILLUMINATE ON THE INSTRUMENT PANEL. HE THEN HEARD A GRINDING NOISE AND THE BRAKE PEDAL WOULD VIBRATE AND …
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. ON SEVERAL OCCASIONS, THE CONTACT HAS EXPERIENCED FAILURES WITH THE BRAKE SYSTEM. THE INITIAL FAILURE BEGAN WHEN HE WOULD APPLY THE BRAKES AND THE BRAKE INDICATOR WOULD ILLUMINATE ON THE INSTRUMENT PANEL. HE THEN HEARD A GRINDING NOISE AND THE BRAKE PEDAL WOULD VIBRATE AND EXTEND TO THE FLOOR. THE CONTACT WOULD HAVE TO RELEASE THE BRAKE PEDAL AND THEN PUMP THE BRAKES IN ORDER FOR THE VEHICLE TO COME TO A STOP. THE VEHICLE WAS TAKEN TO LOCAL REPAIR SHOP AND THEY STATED THAT THE BRAKE PADS AND ROTORS WERE FAILING. THE VEHICLE WAS REPAIRED. THE VEHICLE WAS THEN TAKEN TO THE DEALER TO HAVE A RECALL REPAIRED FOR THE SPEED SENSOR CABLE IN 2006. OVER THE NEXT COUPLE OF YEARS, THE VEHICLE WAS TAKEN TO THE LOCAL REPAIR SHOP TO HAVE THE BRAKES INSPECTED BECAUSE THE BRAKE PEDAL WAS STILL GRINDING AND VIBRATING. THE VEHICLE WAS INSPECTED AND IT WAS DETERMINED ON SEVERAL OCCASIONS THAT THERE WERE NO FAILURES. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP ON DECEMBER 16, 2008 AND THE MECHANIC STATED THAT THE BRAKE PADS AND ROTORS WERE FUNCTIONAL; HOWEVER, THE SPEED SENSOR CONTROL FAILED DUE TO CORROSION. THE VEHICLE HAS NOT BEEN REPAIRED. THE CONTACT CALLED THE MANUFACTURER AND WAS INFORMED TO TAKE THE VEHICLE BACK TO THE DEALER FOR INSPECTION. THEY FURTHER STATED THAT NO COMPENSATION WOULD BE MADE REGARDING THE SPEED CONTROL SENSOR BECAUSE IT WAS PREVIOUSLY REPLACED. THE FAILURE MILEAGE WAS 50,000 AND CURRENT MILEAGE WAS 84,000. UPDATED 2/5/09 *CN UPDATED 02/10/09. *JB
NHTSA ODI #10252008
Mileage unknown · Dec 11, 2008
Service Brakes, Hydraulic
I OWN A 2000 CHEVY SILVERADO WITH BRAKES THAT ARE SOFT. THIS CONDITION HAS BEEN SINCE "DAY ONE" AND I CONSIDER THE VEHICLE DANGEROUS TO BRING TO A STOP. I TRAILER A 3000LB BOAT, AND EVEN THOUGH THE BOAT'S TRAILER HAS BRAKES, IT'S ALMOST IMPOSSIBLE TO MAKE AN EMERGENCY STOP. THE TRUCK IS MAINTAINED PROPERLY, AND IS CONSIDERED IN …
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I OWN A 2000 CHEVY SILVERADO WITH BRAKES THAT ARE SOFT. THIS CONDITION HAS BEEN SINCE "DAY ONE" AND I CONSIDER THE VEHICLE DANGEROUS TO BRING TO A STOP. I TRAILER A 3000LB BOAT, AND EVEN THOUGH THE BOAT'S TRAILER HAS BRAKES, IT'S ALMOST IMPOSSIBLE TO MAKE AN EMERGENCY STOP. THE TRUCK IS MAINTAINED PROPERLY, AND IS CONSIDERED IN EXCELLENT CONDITION BY ALL WHO SEES AND OR RIDES IN IT. I'VE HAD THE BRAKE SYSTEM PROFESSIONALLY SERVICED, INCLUDING A SYSTEM BLEED, BUT THIS CONDITION PERSISTS. OTHER THAN THE SOFT BRAKE FEEL PROBLEM, I LIKE THE VEHICLE. *TR
NHTSA ODI #10251449
118,000 miles · Nov 28, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE REAR DRIVER'S SIDE BRAKES MADE A CLICKING SOUND AND APPEARED TO BE WEARING OUT. THE MANUFACTURER STATED THAT THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 00X001000 (SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER), ALTHOUGH THE FAILURES WERE IDENTICAL.…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE REAR DRIVER'S SIDE BRAKES MADE A CLICKING SOUND AND APPEARED TO BE WEARING OUT. THE MANUFACTURER STATED THAT THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 00X001000 (SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER), ALTHOUGH THE FAILURES WERE IDENTICAL. THE VEHICLE WAS REPAIRED AT THE OWNER'S EXPENSE. THE FAILURE AND CURRENT MILEAGES WERE 118,000.
NHTSA ODI #10250071
106,000 miles · Oct 17, 2008
Service Brakes, HydraulicCrashInjury
DRIVING AT 35 MPH I WENT TO STOP FOR A TURNING CAR. THE BRAKE PEDAL WENT TO THE FLOOR AND THE TRUCK WOULD NOT STOP. TO AVOID AN HITTING THE CAR IN FRONT OF ME, I VEERED TO THE RIGHT AND WENT INTO A DITCH. AFTER INSPECTION OF THE VEHICLE IT WAS NOTED THAT EVERY ONE OF THE BRAKE LINES (SHAPED AS A HOOK) THAT ARE NEAR THE ABS BO…
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DRIVING AT 35 MPH I WENT TO STOP FOR A TURNING CAR. THE BRAKE PEDAL WENT TO THE FLOOR AND THE TRUCK WOULD NOT STOP. TO AVOID AN HITTING THE CAR IN FRONT OF ME, I VEERED TO THE RIGHT AND WENT INTO A DITCH. AFTER INSPECTION OF THE VEHICLE IT WAS NOTED THAT EVERY ONE OF THE BRAKE LINES (SHAPED AS A HOOK) THAT ARE NEAR THE ABS BOX WERE ABNORMALLY CORRODED AND RUSTED THROUGH EVEN THOUGH THEY ARE SUPPOSED TO BE MADE FROM STAINLESS STEEL. BRAKE FLUID GUSHED OUT WHEN THE BRAKES WERE APPLIED. THIS VEHICLE IS STORED DURING WINTER MONTHS (NOV.-APR) SALT AND SNOW ARE NOT ISSUES. I HAVE A 2001 GMC 4X4 AND INSPECTED THE BRAKE LINES AFTER THE ACCIDENT WITH THE SILVERADO. THOSE BRAKE LINES LOOK FINE.*TR
NHTSA ODI #10245838
66,300 miles · Oct 9, 2008
Service Brakes, HydraulicCrash
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING AT LOW SPEEDS AND THEN DEPRESSING THE BRAKE PEDAL, THE PEDAL VIBRATES AND PUSHES BACK ON THE CONTACT'S FOOT. HE FURTHER STATED THAT THE PEDAL EXTENDED TO THE FLOOR WHEN THE BRAKE PEDAL WAS DEPRESSED, BUT THE VEHICLE DID NOT SLOW DOWN OR STOP. THE CONTACT CONTI…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING AT LOW SPEEDS AND THEN DEPRESSING THE BRAKE PEDAL, THE PEDAL VIBRATES AND PUSHES BACK ON THE CONTACT'S FOOT. HE FURTHER STATED THAT THE PEDAL EXTENDED TO THE FLOOR WHEN THE BRAKE PEDAL WAS DEPRESSED, BUT THE VEHICLE DID NOT SLOW DOWN OR STOP. THE CONTACT CONTINUED TO APPLY PRESSURE TO THE BRAKE PEDAL, BUT NOTHING HAPPENED. THE CONTACT HAD TO CRASH INTO A PILE OF COD TO STOP THE VEHICLE. THE CURRENT MILEAGE WAS 77,100 AND FAILURE MILEAGE WAS 66,300.
NHTSA ODI #10244958
72,000 miles · Sep 22, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 60 MPH AND APPLYING THE BRAKES, THE ABS WOULD ENGAGE AND CAUSE THE VEHICLE TO SKID ON DRY ROAD CONDITIONS. THE BRAKE SHOES AND ROTORS WERE REPLACED BY THE DEALER, BUT THE FAILURE RECURRED. THE FAILURE MILEAGE WAS 72,000 AND CURRENT MILEAGE WAS 76,500.
NHTSA ODI #10243079
162,000 miles · Sep 9, 2008
Air BagsService Brakes, HydraulicCrash
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 35 MPH AND APPROACHING A STOP LIGHT, THE VEHICLE DID NOT STOP WHEN THE BRAKE PEDAL WAS DEPRESSED. AS A RESULT, HE REAR ENDED ANOTHER VEHICLE. THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED. THE DEALER DIAGNOSED THE VEHICLE AS HAVING A…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 35 MPH AND APPROACHING A STOP LIGHT, THE VEHICLE DID NOT STOP WHEN THE BRAKE PEDAL WAS DEPRESSED. AS A RESULT, HE REAR ENDED ANOTHER VEHICLE. THE AIR BAGS FAILED TO DEPLOY. A POLICE REPORT WAS FILED. THE DEALER DIAGNOSED THE VEHICLE AS HAVING A ROTTEN AND CORRODED BRAKE LINE. THE CURRENT AND FAILURE MILEAGES WERE 162,000.
NHTSA ODI #10241456
162,000 miles · Aug 25, 2008
Service Brakes, HydraulicCrash
ON THIS DATE I WAS OUT SHOPPING ,WHEN I APPROACHED A REDLIGHT. I APPLIED THE BRAKE AND FELT NO RESPONSE. APPLIED MORE PRESSURE AND FELT ABS PULSE ABOUT 4 TIMES. THEN THE PEDAL WENT TO THE FLOOR. I HIT A HONDA ODYSSEY IN THE REAR,THAT CONTAINED 3 SMALL CHILDREN AND THEIR FATHER. LUCKILY, NO INJURIES. LOOKS LIKE A BRAKE LINE FAILE…
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ON THIS DATE I WAS OUT SHOPPING ,WHEN I APPROACHED A REDLIGHT. I APPLIED THE BRAKE AND FELT NO RESPONSE. APPLIED MORE PRESSURE AND FELT ABS PULSE ABOUT 4 TIMES. THEN THE PEDAL WENT TO THE FLOOR. I HIT A HONDA ODYSSEY IN THE REAR,THAT CONTAINED 3 SMALL CHILDREN AND THEIR FATHER. LUCKILY, NO INJURIES. LOOKS LIKE A BRAKE LINE FAILED, WHY?????????? THE STATE OF RI IMPOUNDED THE TRUCK FOR AN INVESTIGATION,THE RESULTS OF WHICH I COULD HAVE WRITTEN AT THE SCENE OF THE ACCIDENT. THEY ONLY STATE THE OBVIOUS. THEY HAVE ALSO SEIZED THE PLATED AND SUSPENDED THE REG. UNTIL ALL REPAIRS ARE MADE AND CERTIFIED . AGAIN I ASK WHY WOULD A BRAKE LINE FAIL ON AN 8 MODEL YEAR OLD VECH. THIS IS VERY DISTURBING TO ME. *TR
NHTSA ODI #10239627
78,000 miles · Jul 24, 2008
Service Brakes, HydraulicCrashInjury
BRAKES FAILED WITH MY DAUGHTER DRIVING WENT ALL THE WAY TO THE FLOOR AND SHE REARENDED A VEHICLE, HER VEHICLE WAS TOWED AND THE FRONT BRAKES REPLACED, THEY HAD COMPLETELY FAILED. *TR
NHTSA ODI #10235642
71,000 miles · Jul 14, 2008
Service Brakes, Hydraulic
BRAKE LINE FAILURE IDENTICAL TO A RECALL DESCRIPTION (00V345000). TOLD BY GM DID NOT APPLY TO MY VEHICLE. FAILURE OCCURRED IN DRIVEWAY. HAD IT OCCURRED ON THE ROAD INJURY OR DEATH COULD HAVE RESULTED. TAKING VEHICLE TO DEALER FOR REPAIR. *TR
NHTSA ODI #10234220
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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