NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filterMileage unknown · Jun 23, 2011
Service Brakes, Hydraulic
TL- THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE VEHICLE WOULD NOT COME TO A SMOOTH STOP WITHOUT THE ABS SYSTEM BEING ACTIVATED. THE CONTACT STATED THAT THE FAILURE ALSO EXTENDED THE STOPPING DISTANCE. THE CONTACTBELEIVED THE FAILURE TO BE A SAFETY ISSUE BECAUSE OF THE INCREASE IN STOPPING DISTAN…
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TL- THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE VEHICLE WOULD NOT COME TO A SMOOTH STOP WITHOUT THE ABS SYSTEM BEING ACTIVATED. THE CONTACT STATED THAT THE FAILURE ALSO EXTENDED THE STOPPING DISTANCE. THE CONTACTBELEIVED THE FAILURE TO BE A SAFETY ISSUE BECAUSE OF THE INCREASE IN STOPPING DISTANCE. THE FAILURE WAS REPAIRED TWICE BEFORE BY THE MANUFACTURER BUT CONTINUED TO FAIL. THE FAILURE MILEAGE WAS UNKNOWN AND THE CURRENT MILEAGE WAS 80,500.
NHTSA ODI #10408705
139,000 miles · Jun 20, 2011
Service Brakes, Hydraulic
I WAS BRAKING WHILE EXITING MY LOCAL EXIT ON THE HIGHWAY WHEN HYDRAULIC BRAKE PRESSURE WAS SUDDENLY AND COMPLETELY LOST, SENDING THE PEDAL TO THE FLOOR. UNABLE TO STOP IN TIME, I WENT THROUGH THE STOP SIGN AT THE END OF THE RAMP. LUCKILY THERE WAS NO ONCOMING TRAFFIC AND I WAS ABLE TO TAKE THE TURN AND BRING THE VEHICLE TO A S…
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I WAS BRAKING WHILE EXITING MY LOCAL EXIT ON THE HIGHWAY WHEN HYDRAULIC BRAKE PRESSURE WAS SUDDENLY AND COMPLETELY LOST, SENDING THE PEDAL TO THE FLOOR. UNABLE TO STOP IN TIME, I WENT THROUGH THE STOP SIGN AT THE END OF THE RAMP. LUCKILY THERE WAS NO ONCOMING TRAFFIC AND I WAS ABLE TO TAKE THE TURN AND BRING THE VEHICLE TO A STOP ON THE SIDE OF THE ROAD. AFTER GETTING THE VEHICLE HOME ON THE EMERGENCY BRAKE, IT WAS OBVIOUS WHAT HAPPENED, A HYDRAULIC FITTING RUPTURED FROM CORROSION/RUST, WHICH DEPRESSURIZED THE BRAKE SYSTEM. AFTER REPLACING THE FITTING, A COMPLETELY SEPARATE BRAKE LINE BLEW OUT IN A DIFFERENT LOCATION WHICH WOULD/COULD HAVE CAUSED A SEPARATE INCIDENT. IT IS CLEAR THAT EVERY BRAKE LINE AND FITTING NEEDS TO BE CHANGED BECAUSE OF CORROSION/RUST. *TT
NHTSA ODI #10407583
94,000 miles · Jun 11, 2011
Service Brakes, Hydraulic
RUSTED BRAKE LINE LEAKING BRAKE FLUID CAUSIN REAR BRAKE FAILURE. *TR
NHTSA ODI #10405980
40,000 miles · May 26, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHEN THE CONTACT WAS DRIVING APPROXIMATELY 30 MPH, THE ABS WARNING INDICATOR UNEXPECTEDLY ILLUMINATED AND WHEN THE BRAKES WERE ENGAGED THE PEDAL TRAVELED TO THE FLOOR. THERE WAS AN EXTENSIVE DELAYED RESPONSE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TEST…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHEN THE CONTACT WAS DRIVING APPROXIMATELY 30 MPH, THE ABS WARNING INDICATOR UNEXPECTEDLY ILLUMINATED AND WHEN THE BRAKES WERE ENGAGED THE PEDAL TRAVELED TO THE FLOOR. THERE WAS AN EXTENSIVE DELAYED RESPONSE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING AND TO BE REPAIRED; HOWEVER, THE SIMILAR FAILURE RECURRED. THE CONTACT DISCOVERED THERE WERE TWO RECALLS RELATED TO THE DEFECT ASSOCIATED WITH NHTSA CAMPAIGN ID NUMBERS 00V055000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK), AND 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE MANUFACTURER WAS NOTIFIED AND INFORMED HIM THAT THE VIN WAS NOT INCLUDED IN THE RECALLS. THE VEHICLE WAS NOT REPAIRED FOR THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 40,000.
NHTSA ODI #10402849
120,809 miles · Apr 30, 2011
Service Brakes, Hydraulic
SUDDEN TOTAL BRAKE FAILURE ON 2000 CHEVROLET SILVERADO 1500 PICK UP TRUCK. BRAKE LINES RUSTED AND LEAKING. REPAIRED REAR BRAKE LINE THAT WAS SEPARATED IN 2010. ALL LINES APPEAR TO BE SEVERELY CORRODED. *TR
NHTSA ODI #10398340
100,000 miles · Apr 19, 2011
Service Brakes, Hydraulic
I HAD COMPLETE FAILURE OF MY 2000 SILVERADO 1500 2WD EXT CAB BRAKE LINES . *TR
NHTSA ODI #10396795
118,000 miles · Apr 12, 2011
Service Brakes, HydraulicSuspension
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STARTED THE IGNITION, AND WHEN PRESSURE WAS APPLIED TO THE BRAKE HIS FOOT IMMEDIATELY TRAVELED TO THE FLOOR WITHOUT A RESPONSE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THEY STATED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS REPA…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STARTED THE IGNITION, AND WHEN PRESSURE WAS APPLIED TO THE BRAKE HIS FOOT IMMEDIATELY TRAVELED TO THE FLOOR WITHOUT A RESPONSE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THEY STATED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS REPAIRED. IN ADDITION, THE REAR SHOCK SUPPORT BEAM FRACTURED, AND THE CONTACT WAS UNSUCCESSFUL IN LOCATING THE PART FOR THE REPAIR. THE FAILURE MILEAGE WAS 118,000.
NHTSA ODI #10395569
170,000 miles · Apr 7, 2011
Fuel System, GasolineService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE THE VEHICLE WAS BEING SERVICE FOR ROUTINE MAINTENANCE, THE CONTACT WAS ADVISED BY THE MECHANIC THAT THE FRONT AND REAR BRAKE LINES AS WELL AS THE FUEL LINE WAS CORRODED. THE VEHICLE WAS NOT YET REPAIRED AS THE CONTACT WAS AWAITING THE ARRIVAL OF THE PARTS NEEDED FOR REP…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE THE VEHICLE WAS BEING SERVICE FOR ROUTINE MAINTENANCE, THE CONTACT WAS ADVISED BY THE MECHANIC THAT THE FRONT AND REAR BRAKE LINES AS WELL AS THE FUEL LINE WAS CORRODED. THE VEHICLE WAS NOT YET REPAIRED AS THE CONTACT WAS AWAITING THE ARRIVAL OF THE PARTS NEEDED FOR REPAIRS. THE FAILURE MILEAGE WAS 170,000 AND THE CURRENT MILEAGE WAS 171,000.
NHTSA ODI #10395189
115,000 miles · Mar 31, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT NOTICED THAT WHEN TRAVELING AT LOWS SPEEDS THE ANTI-LOCK BRAKE SYSTEM WOULD ACTIVATE SUDDENLY, MAKING IT DIFFICULT TO IDLE THE VEHICLE. THE CONTACT DID NOT INFORM HIS LOCAL DEALER; HOWEVER, THE MANUFACTURER ADVISED THE CONTACT THAT DUE TO THE AGE AND MILEAGE, THERE…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT NOTICED THAT WHEN TRAVELING AT LOWS SPEEDS THE ANTI-LOCK BRAKE SYSTEM WOULD ACTIVATE SUDDENLY, MAKING IT DIFFICULT TO IDLE THE VEHICLE. THE CONTACT DID NOT INFORM HIS LOCAL DEALER; HOWEVER, THE MANUFACTURER ADVISED THE CONTACT THAT DUE TO THE AGE AND MILEAGE, THERE WAS NOTHING THAT THEY COULD DO. NO REPAIRS WERE PERFORMED. THE FAILURE MILEAGE WAS 115,000.
NHTSA ODI #10393895
129,000 miles · Mar 11, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH, AND THE BRAKES WERE ENGAGED NUMEROUS TIMES BEFORE THE VEHICLE CAME TO A COMPLETE STOP. THE CONTACT INSPECTED THE VEHICLE AND DETECTED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEA…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH, AND THE BRAKES WERE ENGAGED NUMEROUS TIMES BEFORE THE VEHICLE CAME TO A COMPLETE STOP. THE CONTACT INSPECTED THE VEHICLE AND DETECTED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 129,000.
NHTSA ODI #10389867
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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