NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
78 reportsClear category filter73,100 miles · Jan 5, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500 4X4. WHILE DRIVING APPROXIMATELY 5 MPH HE ENGAGED THE BRAKES AND THE VEHICLE DID NOT STOP. HE APPLIED PRESSURE TO THE BRAKES IN ORDER TO STOP THE VEHICLE. SEVERAL VEHICLES WERE BLOWING THEIR HORNS IN ORDER TO AVOID A CRASH BECAUSE THE VEHICLE STOPPED IN AN INTERSECTION. THE VEHICLE WAS…
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TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500 4X4. WHILE DRIVING APPROXIMATELY 5 MPH HE ENGAGED THE BRAKES AND THE VEHICLE DID NOT STOP. HE APPLIED PRESSURE TO THE BRAKES IN ORDER TO STOP THE VEHICLE. SEVERAL VEHICLES WERE BLOWING THEIR HORNS IN ORDER TO AVOID A CRASH BECAUSE THE VEHICLE STOPPED IN AN INTERSECTION. THE VEHICLE WAS TAKEN TO THE DEALER WHO CONFIRMED THAT THE WHEEL SPEED SENSOR NEEDED TO BE REPLACED OR CLEANED AND WAS THE CAUSE OF THE FAILURE. THE CONTACT WILL BE RESPONSIBLE FOR THE REPAIR COST. THE CONTACT CALLED THE MANUFACTURER AND REFERENCED RECALL 05V379000, SERVICE BRAKES, HYDRAULIC:ANTI LOCK AND WAS ADVISED THAT THE RECALL REPAIR HAD ALREADY BEEN PERFORMED ON THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 73,100 AND THE CURRENT MILEAGE WAS 73,330.
NHTSA ODI #10374745
130,000 miles · Dec 19, 2010
Fuel System, GasolineService Brakes, Hydraulic
I HAVE A 2000 GMC SIERRA THAT HAD BRAKE LINE RUST THROUGH CAUSING BRAKE FAILURE. I GOT UNDER THE VEHICLE TO TRY AND CHANGE THE LINE AND FOUND ALL THE LINES ARE SEVERELY RUSTED AS IS THE FUEL LINES. YES MY TRUCK IS OLD AND I LIVE IN THE RUST BELT OF N.Y BUT SOMETHING NEEDS TO BE DONE EITHER N.Y STOP USING SALT OR THE VEHICLES NE…
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I HAVE A 2000 GMC SIERRA THAT HAD BRAKE LINE RUST THROUGH CAUSING BRAKE FAILURE. I GOT UNDER THE VEHICLE TO TRY AND CHANGE THE LINE AND FOUND ALL THE LINES ARE SEVERELY RUSTED AS IS THE FUEL LINES. YES MY TRUCK IS OLD AND I LIVE IN THE RUST BELT OF N.Y BUT SOMETHING NEEDS TO BE DONE EITHER N.Y STOP USING SALT OR THE VEHICLES NEED TO BE BUILT WITH LINES THAT DON'T RUST OUT. THIS ISSUE I THINK IS A SAFETY ISSUE THAT WOULD BE EASILY FIXED BY EITHER NO MORE SALT OR BETTER LINE IN THE VEHICLES THAT DON'T RUST THROUGH. *TR
NHTSA ODI #10371214
62,000 miles · Nov 29, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. WHILE THE CONTACT WAS DRIVING 5 MPH, THE BRAKE PEDAL DROPPED TO THE FLOORBOARD AND BRAKE FLUID SPRAYED OUT. THE CONTACT USED THE EMERGENCY BRAKE AND WAS ABLE TO STOP. THE VEHICLE WAS TOWED TO A LOCAL REPAIR SHOP BUT WAS NOT REPAIRED. THE MECHANIC STATED THAT THE ENTIRE BRAKE LINE NEEDE…
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TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. WHILE THE CONTACT WAS DRIVING 5 MPH, THE BRAKE PEDAL DROPPED TO THE FLOORBOARD AND BRAKE FLUID SPRAYED OUT. THE CONTACT USED THE EMERGENCY BRAKE AND WAS ABLE TO STOP. THE VEHICLE WAS TOWED TO A LOCAL REPAIR SHOP BUT WAS NOT REPAIRED. THE MECHANIC STATED THAT THE ENTIRE BRAKE LINE NEEDED TO BE REPLACED AS IT WAS RUSTED. THE FAILURE MILEAGE WAS 62,000.
NHTSA ODI #10368158
170,000 miles · Nov 26, 2010
Service Brakes, Hydraulic
ORIGINAL OWNER, 2000 GMC SIERRA SLE, TRUCK HAS 178K MILES. TOTAL BRAKE FAILURE WHEN STEPPING ON PEDAL AFTER START UP TO SHIFT INTO DRIVE. NOTICED PUDDLE OF BRAKE FLUID UNDER TRUCK BELOW DRIVERS SEAT. CALLED A FRIEND WHO FOUND THE BRAKE LINE GOING FROM JUNCTION BELOW DRIVERS SEAT TO FRONT LEFT WHEEL HAD FAILED. *TR
NHTSA ODI #10367858
100,000 miles · Sep 20, 2010
Service Brakes, Hydraulic
I HAVE A 2000 GMC SIERRA 1500 SLE PICKUP TRUCK. AT 8 YEARS OLD - ONE OF MY BRAKE LINES FAILED WHILE DRIVING ON THE HIGHWAY. THIS WAS DUE TO EXTENSIVE CORROSION ON THE UNDER CARRIAGE OF THE CAR. I HAD TO HAVE EVERY LAST BRAKE LINE REPLACED FOR $1,600 DUE TO THE CORROSION. I HAVE NEVER SEEN CORROSION ON SUCH AN IMPORTANT COMPO…
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I HAVE A 2000 GMC SIERRA 1500 SLE PICKUP TRUCK. AT 8 YEARS OLD - ONE OF MY BRAKE LINES FAILED WHILE DRIVING ON THE HIGHWAY. THIS WAS DUE TO EXTENSIVE CORROSION ON THE UNDER CARRIAGE OF THE CAR. I HAD TO HAVE EVERY LAST BRAKE LINE REPLACED FOR $1,600 DUE TO THE CORROSION. I HAVE NEVER SEEN CORROSION ON SUCH AN IMPORTANT COMPONENT BEFORE. AS AN ASIDE, MUCH OF THE REST OF THE TRUCK IS INCREDIBLY CORRODED ON THE UNDERSIDE, AND I JUST HAD A FUEL LINE FAIL FOR THE SAME REASON. *TR
NHTSA ODI #10356516
124,000 miles · Sep 8, 2010
Service Brakes, Hydraulic
3RD TIME BRAKES/ROTORS HAVE BEEN REPLACED. THIS TIME I FOUND I NEEDED TO REPLACE THE FRONT CALIPERS ALSO. I HAVE A DETAILED VEHICLE REPAIR HISTORY FROM THE DAY IT WAS FIRST PURCHASED. THE BRAKELINES ARE IN BAD SHAPE. WHILE BLEEDING THE BRAKES AFTER INSTALLATION, I HAD ONE OF THE LINES RUPTURE FROM CORROSION. UPON INSPECTION OF…
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3RD TIME BRAKES/ROTORS HAVE BEEN REPLACED. THIS TIME I FOUND I NEEDED TO REPLACE THE FRONT CALIPERS ALSO. I HAVE A DETAILED VEHICLE REPAIR HISTORY FROM THE DAY IT WAS FIRST PURCHASED. THE BRAKELINES ARE IN BAD SHAPE. WHILE BLEEDING THE BRAKES AFTER INSTALLATION, I HAD ONE OF THE LINES RUPTURE FROM CORROSION. UPON INSPECTION OF ALL BRAKELINES, I FIND IT NECESSARY TO REPLACE ALL BRAKELINES FOR THE SAFETY OF MYSELF AND MY FAMILY AND THE OTHER MOTORISTS ON THE ROAD. *TR
NHTSA ODI #10354535
105,000 miles · Aug 31, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. WHILE TRAVELING 45 MPH THE CONTACT APPLIED THE BRAKES AND NOTICED THAT THE BRAKE PEDAL HAD FALLEN TO THE FLOOR OF THE VEHICLE AND THE BRAKES WOULD NOT ENGAGE. THE CONTACT EXAMINED THE VEHICLE AND NOTICED THAT THE BRAKE LINE WAS COVERED WITH RUST. THE VEHICLE WAS NOT DIAGNOSED AND THERE…
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TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. WHILE TRAVELING 45 MPH THE CONTACT APPLIED THE BRAKES AND NOTICED THAT THE BRAKE PEDAL HAD FALLEN TO THE FLOOR OF THE VEHICLE AND THE BRAKES WOULD NOT ENGAGE. THE CONTACT EXAMINED THE VEHICLE AND NOTICED THAT THE BRAKE LINE WAS COVERED WITH RUST. THE VEHICLE WAS NOT DIAGNOSED AND THERE WERE NO PRIOR WARNINGS. THE CURRENT AND FAILURE MILEAGES WERE 105,000.
NHTSA ODI #10353097
80,000 miles · Aug 31, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT WAS DRIVING 30 MPH WHEN THE ABS LIGHT ILLUMINATED. WHEN DEPRESSED, THE BRAKES WOULD FALL MUCH FARTHER INTO THE FLOORBOARD THAN USUAL. THE DEALER REPLACED THE SPEED SENSOR YET THE ABS WARNING LIGHT ILLUMINATED IMMEDIATELY FOLLOWING REPAIRS. THE DEALER THEN ADVISED THAT TH…
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT WAS DRIVING 30 MPH WHEN THE ABS LIGHT ILLUMINATED. WHEN DEPRESSED, THE BRAKES WOULD FALL MUCH FARTHER INTO THE FLOORBOARD THAN USUAL. THE DEALER REPLACED THE SPEED SENSOR YET THE ABS WARNING LIGHT ILLUMINATED IMMEDIATELY FOLLOWING REPAIRS. THE DEALER THEN ADVISED THAT THE FAILURE COULD BE CAUSED BY A FAULTY VALVE OR MODULE. THE MANUFACTURER WOULD NOT PROVIDE ANY ASSISTANCE. THE VEHICLE WAS NOT FURTHER REPAIRED. THE FAILURE MILEAGE WAS 80,000. THE CONSUMER STATED HE SPENT OVER $3000 ON THE BRAKE MODULE AND BRAKE LINES WHICH WERE RUSTED. UPDATED 12/22/10. *JB
NHTSA ODI #10352979
107,000 miles · Aug 16, 2010
Service Brakes, Hydraulic
BRAKING COMING TO A RED LIGHT. CATASTROPHIC BRAKE FAILURE OCCURRED DUE TO BRAKE LINE CORROSION. UPON INVESTIGATION, ALL FIVE BRAKE LINES LEADING FROM THE PUMP UNDER THE DRIVERS SEAT, NEXT TO THE FRAME ARE SEVERELY CORRODED. EVERYTHING ELSE IS IN VERY GOOD CONDITION. THERE IS ALMOST NO CORROSION AT, EXCEPT THE SEVERELY CORRODE…
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BRAKING COMING TO A RED LIGHT. CATASTROPHIC BRAKE FAILURE OCCURRED DUE TO BRAKE LINE CORROSION. UPON INVESTIGATION, ALL FIVE BRAKE LINES LEADING FROM THE PUMP UNDER THE DRIVERS SEAT, NEXT TO THE FRAME ARE SEVERELY CORRODED. EVERYTHING ELSE IS IN VERY GOOD CONDITION. THERE IS ALMOST NO CORROSION AT, EXCEPT THE SEVERELY CORRODED BRAKE LINES. ALL BRAKE LINES NEED TO BE REPLACED. THIS IS CLEARLY AN ISSUE OF INFERIOR BRAKE LINES USED. *TR
NHTSA ODI #10349624
131,000 miles · Aug 2, 2010
Service Brakes, Hydraulic
WHEN GETTING READY TO PULL OUT OF OUT DRIVEWAY, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR. I HAD A MECHANIC LOOK AT IT AND WAS TOLD ALL OF THE BRAKE LINES RUNNING ALONG THE FRAME BY THE ABS ACTUATOR WERE COMPLETELY RUSTED AND SOME WERE RUSTED COMPLETELY THROUGH. HE SAID ALL LINES WOULD HAVE TO BE REPLACED. LUCKILY I WASN'…
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WHEN GETTING READY TO PULL OUT OF OUT DRIVEWAY, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR. I HAD A MECHANIC LOOK AT IT AND WAS TOLD ALL OF THE BRAKE LINES RUNNING ALONG THE FRAME BY THE ABS ACTUATOR WERE COMPLETELY RUSTED AND SOME WERE RUSTED COMPLETELY THROUGH. HE SAID ALL LINES WOULD HAVE TO BE REPLACED. LUCKILY I WASN'T ON THE HIGHWAY OR ROADWAY AND INVOLVED IN AN ACCIDENT. I HAD TO HAVE IT TOWED TO THE DEALER FOR REPAIRS. *TR
NHTSA ODI #10346923
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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