NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter44,000 miles · Nov 29, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE DID NOT STOP AND CONTINUED TO ROLL FORWARD AND THE ANTI-LOCK BEGAN TO PULSATE BUT NO BRAKING. HE ALMOST CRASHED INTO ANOTHER VEHICLE. THE DEALER STATED THAT THE FRONT WHEEL SPEED SENSOR FAILED AND DISABLED…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH, THE CONTACT APPLIED THE BRAKES AND THE VEHICLE DID NOT STOP AND CONTINUED TO ROLL FORWARD AND THE ANTI-LOCK BEGAN TO PULSATE BUT NO BRAKING. HE ALMOST CRASHED INTO ANOTHER VEHICLE. THE DEALER STATED THAT THE FRONT WHEEL SPEED SENSOR FAILED AND DISABLED THE BRAKING SYSTEM. BOTH FRONT SPEED SENSORS WERE REPLACED. THE MANUFACTURER STATED THAT THE VEHICLE WAS NOT UNDER WARRANTY AND WOULD BE UNABLE TO ASSIST. THE CURRENT AND FAILURE MILEAGES WERE 44,000. UPDATED 01/17/08 *BF UPDATED 01/17/07 *TR
NHTSA ODI #10210277
74,688 miles · Nov 12, 2007
Service Brakes, Hydraulic
ON OCTOBER 28TH, 2007 I PUT ON MY BRAKES TO STOP AND THE BRAKE LINES BLOW OUT AND I COULDN'T STOP AS QUICKLY AS I SHOULD HAVE. THE BRAKE FLUID DRAINED OUT OF THE LINES DUE TO THE RUPTURE. I HAD THE VEHICLE TOWED AND THE BRAKE LINES REPLACED AT A CHEVY DEALERSHIP. I WOULD HATE TO THINK IF A PEDESTRIAN HAD RUN OUT IN FRONT OF M…
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ON OCTOBER 28TH, 2007 I PUT ON MY BRAKES TO STOP AND THE BRAKE LINES BLOW OUT AND I COULDN'T STOP AS QUICKLY AS I SHOULD HAVE. THE BRAKE FLUID DRAINED OUT OF THE LINES DUE TO THE RUPTURE. I HAD THE VEHICLE TOWED AND THE BRAKE LINES REPLACED AT A CHEVY DEALERSHIP. I WOULD HATE TO THINK IF A PEDESTRIAN HAD RUN OUT IN FRONT OF ME, WHAT MAY HAVE HAPPENED! *TR
NHTSA ODI #10208685
54,090 miles · Oct 15, 2007
Service Brakes, HydraulicCrash
UPON ENTERING PARKING SPACE AT WORK ABS SYSTEM CAME ON FOR NO REASON CAUSING VEHICLE TO LUNGE FORWARD THREW FENCE. *JB
NHTSA ODI #10205776
59,500 miles · Oct 10, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 3 MPH AND APPROACHING A STOP, THE ABS ENGAGED AND THE VEHICLE MADE A NOISE. AS A RESULT, THE VEHICLE FAILS TO STOP PROPERLY AND THE STOPPING DISTANCE HAS INCREASED. THE FAILURE HAS OCCURRED ON TWELVE OCCASIONS. HE HAS TAKEN THE VEHICLE TO THE DE…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 3 MPH AND APPROACHING A STOP, THE ABS ENGAGED AND THE VEHICLE MADE A NOISE. AS A RESULT, THE VEHICLE FAILS TO STOP PROPERLY AND THE STOPPING DISTANCE HAS INCREASED. THE FAILURE HAS OCCURRED ON TWELVE OCCASIONS. HE HAS TAKEN THE VEHICLE TO THE DEALER FOR INSPECTION. A RECALL REPAIR FOR NHTSA CAMPAIGN ID NUMBER 05V379000 WAS PERFORMED ON THE VEHICLE IN JUNE OF 2006. THE CURRENT MILEAGE WAS 60,000 AND FAILURE MILEAGE WAS 59,500. UPDATED 10/31/07 *TR
NHTSA ODI #10205367
97,000 miles · Sep 20, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE PEDAL EXTENDED TO THE FLOOR BOARD WHEN IT WAS DEPRESSED. THE MECHANIC STATED THAT THE REAR BRAKE LINES WERE CORRODED. THE BRAKE LINES WERE REPLACED. APPROXIMATELY SEVEN MONTHS LATER, THE FAILURE RECURRED. THE MECHANIC STATED THAT THE FRON…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE PEDAL EXTENDED TO THE FLOOR BOARD WHEN IT WAS DEPRESSED. THE MECHANIC STATED THAT THE REAR BRAKE LINES WERE CORRODED. THE BRAKE LINES WERE REPLACED. APPROXIMATELY SEVEN MONTHS LATER, THE FAILURE RECURRED. THE MECHANIC STATED THAT THE FRONT BRAKE LINES WERE CORRODED AND THEY REPLACED THEM ONCE AGAIN. THE FAILURE MILEAGE WAS 97,000 AND CURRENT MILEAGE WAS 97,600. UPDATED 12/12/07
NHTSA ODI #10203529
57,000 miles · Sep 4, 2007
Service Brakes, Hydraulic
THE BRAKE LINES FROM THE MASTER CYLINDER TO THE ABS PUMP RUSTED OUT AND FAILED. BRAKE LINE FAILURE RESULTED IN NO BRAKING ABILITY WHATSOEVER. ONE WAS REPLACED EARLIER THAN THE INCIDENT DATE BELOW - APPROXIMATELY 2/07. TRUCK WAS PARKED BOTH TIMES THEY FAILED SO NO ACCIDENT OR INJURY. GOT LUCKY, THIS IS USED AS A TOW VEHICLE FOR A…
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THE BRAKE LINES FROM THE MASTER CYLINDER TO THE ABS PUMP RUSTED OUT AND FAILED. BRAKE LINE FAILURE RESULTED IN NO BRAKING ABILITY WHATSOEVER. ONE WAS REPLACED EARLIER THAN THE INCIDENT DATE BELOW - APPROXIMATELY 2/07. TRUCK WAS PARKED BOTH TIMES THEY FAILED SO NO ACCIDENT OR INJURY. GOT LUCKY, THIS IS USED AS A TOW VEHICLE FOR A TRAILER. THE BRAKE LINES WERE REPLACED, THE OLD LINES ARE AVAILABLE. I DON'T HAVE THE VIN HANDY, CAN SUPPLY ON REQUEST. *TR
NHTSA ODI #10201771
233,400 miles · Aug 10, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 65 MPH, THE BRAKES LOCKED WHEN THEY WERE DEPRESSED. THE VEHICLE SLID APPROXIMATELY THIRTY YARDS. THE ROAD CONDITIONS WERE CLEAR. THE DEALER HAS NOT INSPECTED THE VEHICLE. THERE IS A RECALL FOR THE ANTI-LOCK BRAKES (NHTSA CAMPAIGN ID # 00V055000), HOWEVER, TH…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 65 MPH, THE BRAKES LOCKED WHEN THEY WERE DEPRESSED. THE VEHICLE SLID APPROXIMATELY THIRTY YARDS. THE ROAD CONDITIONS WERE CLEAR. THE DEALER HAS NOT INSPECTED THE VEHICLE. THERE IS A RECALL FOR THE ANTI-LOCK BRAKES (NHTSA CAMPAIGN ID # 00V055000), HOWEVER, THE DEALER AND THE MANUFACTURER STATED THAT HIS VIN WAS NOT INCLUDED IN THE RECALL. THE CONTACT FELT THAT HIS VEHICLE SHOULD BE INCLUDED. THE CURRENT AND FAILURE MILEAGES WERE 233,400.
NHTSA ODI #10199045
129,832 miles · Jul 31, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE CLUTCH HYDRAULIC PUMP FAILED WHILE PULLING OUT OF HER DRIVEWAY. THE VEHICLE CANNOT BE MOVED OR REPAIRED. SHE HAS HAD THREE MECHANICS INSPECT THE VEHICLE AND THEY ALL STATED THAT IT CANNOT BE REPAIRED AND WAS DUE TO A MANUFACTURER DEFECT. GENERAL…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE CLUTCH HYDRAULIC PUMP FAILED WHILE PULLING OUT OF HER DRIVEWAY. THE VEHICLE CANNOT BE MOVED OR REPAIRED. SHE HAS HAD THREE MECHANICS INSPECT THE VEHICLE AND THEY ALL STATED THAT IT CANNOT BE REPAIRED AND WAS DUE TO A MANUFACTURER DEFECT. GENERAL MOTORS STATED THAT THEY CAN DO NOTHING TO ASSIST WITH THE FAILURE. THERE ARE NO RECALLS AVAILABLE FOR HER VEHICLE. THE FAILURE SPEED AND PURCHASE DATE WERE UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 129,832.
NHTSA ODI #10197958
76,632 miles · May 1, 2007
Fuel System, GasolineService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 45 MPH THE BRAKES FAILED. THE FAILURE WAS RELATED TO RECALL 05V379000, CONCERNING SERVICE BRAKES, HYDRAULIC:ANTILOCK IN ADDITION, THE FUEL PUMP FAILED. THE DEALER STATED THAT THE CONTACT'S VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN, AND THAT TH…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 45 MPH THE BRAKES FAILED. THE FAILURE WAS RELATED TO RECALL 05V379000, CONCERNING SERVICE BRAKES, HYDRAULIC:ANTILOCK IN ADDITION, THE FUEL PUMP FAILED. THE DEALER STATED THAT THE CONTACT'S VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN, AND THAT THE SECOND OPINION THAT SHE OBTAINED FROM ANOTHER DEALER CAUSED THEM NOT TO REPAIR THE VEHICLE. THE FAILURE MILEAGE WAS 76632, AND THE CURRENT MILEAGE WAS 76732. *AK
NHTSA ODI #10189385
79,000 miles · Apr 30, 2007
Service Brakes, Hydraulic
TL* CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH AND MAKING A TURN INTO THE DRIVEWAY THE BRAKE PEDAL EXTENDED TO THE FLOOR. THE CONTACT WAS DRIVING SLOW ENOUGH TO AVOID A CRASH. HOWEVER, HE HAD TO USE THE EMERGENCY BRAKE. WHEN HE LOOKED UNDER THE VEHICLE THERE WAS HYDRAULIC FLUID LEAKING OUTSIDE OF THE F…
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TL* CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE DRIVING 5 MPH AND MAKING A TURN INTO THE DRIVEWAY THE BRAKE PEDAL EXTENDED TO THE FLOOR. THE CONTACT WAS DRIVING SLOW ENOUGH TO AVOID A CRASH. HOWEVER, HE HAD TO USE THE EMERGENCY BRAKE. WHEN HE LOOKED UNDER THE VEHICLE THERE WAS HYDRAULIC FLUID LEAKING OUTSIDE OF THE FRAME UNDER THE PASSENGER'S SIDE. THE VEHICLE WAS TOWED TO A LOCAL CHEVROLET DEALER, AND THEY STATED THAT 3 OR 4 BRAKE LINES WERE CORRODED. THE FAILURE AND CURRENT MILEAGE WERE 79000. THE MECHANIC GAVE HIM AN ESTIMATE OF $1,000 TO $1,400. *AK
NHTSA ODI #10189275
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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