NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
222 reportsClear category filter88,000 miles · Mar 29, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH, THE ABS AND PARKING BRAKE WARNING INDICATORS ILLUMINATED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR DIAGNOSIS AND THEY STATED THAT THE ELECTRONIC BRAKE MODULE FAILED. THE VEHICLE HAD NOT BEEN REPAIRED.…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH, THE ABS AND PARKING BRAKE WARNING INDICATORS ILLUMINATED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR DIAGNOSIS AND THEY STATED THAT THE ELECTRONIC BRAKE MODULE FAILED. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 88,000. UPDATED 05/03/11*LJ THE CONSUMER STATED THE ABS CONTROL MODULE NEEDED TO BE REPLACED. ALSO, THE BRAKES LINES WERE RUSTED. UPDATED 05/19/11
NHTSA ODI #10393625
125,000 miles · Mar 17, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT AFTER STARTING HIS VEHICLE AND DEPRESSING THE BRAKES, THE PEDAL EXTENDED TO THE FLOORBOARD. HE NOTICED THAT ALL OF THE BRAKE FLUID LEAKED OUT OF THE VEHICLE DUE TO THE BRAKE LINE BEING CORRODED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC AND WHO R…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT AFTER STARTING HIS VEHICLE AND DEPRESSING THE BRAKES, THE PEDAL EXTENDED TO THE FLOORBOARD. HE NOTICED THAT ALL OF THE BRAKE FLUID LEAKED OUT OF THE VEHICLE DUE TO THE BRAKE LINE BEING CORRODED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC AND WHO REPLACED THE ENTIRE BRAKE LINE. THE FAILURE MILEAGE WAS APPROXIMATELY 125,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10390537
96,823 miles · Mar 13, 2011
Service Brakes, Hydraulic
THE ORIGINAL EQUIPMENT MANUFACTURER BRAKE LINES RUSTED THROUGH AND CREATED A CONDITION OF SUBSTANTIAL FLUID LOSS AND HENCE NEARLY COMPLETE BRAKE FAILURE ON 1MAR2011. THERE WAS NO WARNING OF THE IMPENDING FAILURE. AS THE PRINCIPLE DRIVER WAS LEAVING THE DRIVEWAY THE TRUCK NEARLY DIDN'T STOP IN TIME FOR AN APPROACHING HIGHWAY-SP…
Read full complaint
THE ORIGINAL EQUIPMENT MANUFACTURER BRAKE LINES RUSTED THROUGH AND CREATED A CONDITION OF SUBSTANTIAL FLUID LOSS AND HENCE NEARLY COMPLETE BRAKE FAILURE ON 1MAR2011. THERE WAS NO WARNING OF THE IMPENDING FAILURE. AS THE PRINCIPLE DRIVER WAS LEAVING THE DRIVEWAY THE TRUCK NEARLY DIDN'T STOP IN TIME FOR AN APPROACHING HIGHWAY-SPEED VEHICLE. UPON PARKING THE VEHICLE AFTER THE FAILURE, BRAKE FLUID WAS DISCOVERED RUNNING OUT THE HARD STEEL BRAKE LINES ON THE DRIVERS SIDE OF THE TRUCK. THE LOCATION OF THE LINE FAILURE WAS VERY CLOSE TO WHERE LINES RUN ALONG UPPER OUTSIDE OF FRAME NEARING THE ABS UNIT. THE TRUCK OWNER, RESEARCHED THE CAUSES, FAILURES AND REMEDIES. THE TRUCK OWNER PURCHASED ALL NEW STEEL BRAKE LINES FOR ALL LINES, IN ADDITION ALL FLEXIBLE BRAKE LINES AND FITTINGS IN ORDER TO REPAIR THE FAILURE. *TR
NHTSA ODI #10389958
145,000 miles · Dec 25, 2010
Service Brakes, Hydraulic
WHILE DRIVING MY 1999 CHEVY SILVERADO I WENT TO STOP AND THE BRAKE WENT TO THE FLOOR. I GOT OUT AND FOUND THE BRAKE LINE IN THE ENGINE COMPARTMENT HAD BURST. ALL OF THE LINES WERE RUSTED TO THE POINT OF FAILURE. *TR
NHTSA ODI #10372381
145,000 miles · Dec 7, 2010
Service Brakes, Hydraulic
1999 CHEVY SILVERADO 4X4. CAME TO A STOP AT STOP SIGN AND SUDDENLY LOST ALL BRAKES. I GOT OUT OF THE TRUCK AND FLUID WAS LEAKING FROM THE GAS TANK AREA. UPON FURTHER INSPECTION I FOUND THE BRAKE LINE WAS CORRODED AND HAD BURST. *TR
NHTSA ODI #10369512
126,000 miles · Nov 15, 2010
Service Brakes, Hydraulic
AS I APPROACH A STOP, AT VERY LOW SPEEDS, THE ABS UNIT KICKS IN WITH A SUDDEN SHUTTER AND EXTENDS THE STOP TIME AND DISTANCE. THIS STARTED ABOUT 3 MONTHS AGO AND HAS NOT GOTTEN BETTER OR WORSE. IT IS UNNERVING TO HAVE THIS HAPPEN WHEN I NEED TO STOP AT AN INTERSECTION OR APPROACHING A TRAFFIC SIGNAL TURNING RED. RESEARCH ON THE …
Read full complaint
AS I APPROACH A STOP, AT VERY LOW SPEEDS, THE ABS UNIT KICKS IN WITH A SUDDEN SHUTTER AND EXTENDS THE STOP TIME AND DISTANCE. THIS STARTED ABOUT 3 MONTHS AGO AND HAS NOT GOTTEN BETTER OR WORSE. IT IS UNNERVING TO HAVE THIS HAPPEN WHEN I NEED TO STOP AT AN INTERSECTION OR APPROACHING A TRAFFIC SIGNAL TURNING RED. RESEARCH ON THE INTERNET INDICATES A NHTSA CAMPAIGN ID 05V37900 PE05020 WAS ISSUED FOR THIS VERY SAME PROBLEM, INCLUDING THOSE VEHICLES IN MY STATE. I HAVE BEEN TOLD, BOTH BY CHEVROLET AND NHTSA, THAT MY VEHICLE'S VIN NUMBER WAS NOT INCLUDED IN GM RECALL NO. 05068, THEREFORE NOT THEIR NOR YOUR PROBLEM. I AM UPSET THAT I HAVE BEEN REBUFFED AND WANT TO KNOW WHY MY VEHICLE DOESN'T MATTER AND THE OTHER ONES DO. I HAVE HAD MANY PROBLEMS WITH THE TRUCK'S DISC BRAKES OVER THE YEARS BUT THIS ONE CONCERNS ME VERY MUCH SINCE I DON'T KNOW IF OR WHEN THEY MAY FAIL IN AN EMERGENCY. THANKS YOU FOR YOUR ATTENTION. I AM AWAITING YOUR RESPONSE.
NHTSA ODI #10366304
78,000 miles · Nov 15, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT APPLIED PRESSURE TO THE BRAKE PEDAL AND THE ANTILOCK BRAKING SYSTEM ENGAGED INDEPENDENTLY. HE ALSO EXPERIENCED AN INCREASE IN STOPPING DISTANCE AND TIME. THE FAILURE RECURRED WHENEVER HE WOULD APPLY THE BRAKE PEDAL WHEN DRIVI…
Read full complaint
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 10 MPH, THE CONTACT APPLIED PRESSURE TO THE BRAKE PEDAL AND THE ANTILOCK BRAKING SYSTEM ENGAGED INDEPENDENTLY. HE ALSO EXPERIENCED AN INCREASE IN STOPPING DISTANCE AND TIME. THE FAILURE RECURRED WHENEVER HE WOULD APPLY THE BRAKE PEDAL WHEN DRIVING AT LOW SPEEDS. THE MANUFACTURER WAS NOTIFIED AND THE CONTACT WAS INFORMED THAT HIS VEHICLE WAS NOT INCLUDED IN THE RECALL ASSOCIATED WITH NHTSA CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 78,000 AND THE CURRENT MILEAGE WAS 84,000.
NHTSA ODI #10365737
225,000 miles · Nov 11, 2010
Service Brakes, Hydraulic
ON 11/6/2010 I WAS LEAVING MY NEIGHBORHOOD IN MY 1999 CHEVROLET SILVERADO TRUCK. WHEN I APPROACHED A STOP SIGN I PRESSED THE BRAKE PEDAL AND THE PEDAL WENT STRAIGHT TO THE FLOOR. I HAD NO BRAKE PRESSURE AND WAS UNABLE TO STOP AT THE STOP SIGN. LUCKILY, I WAS ABLE TO AVOID AN ACCIDENT BECAUSE THERE WAS NO ONCOMING TRAFFIC. I PUT …
Read full complaint
ON 11/6/2010 I WAS LEAVING MY NEIGHBORHOOD IN MY 1999 CHEVROLET SILVERADO TRUCK. WHEN I APPROACHED A STOP SIGN I PRESSED THE BRAKE PEDAL AND THE PEDAL WENT STRAIGHT TO THE FLOOR. I HAD NO BRAKE PRESSURE AND WAS UNABLE TO STOP AT THE STOP SIGN. LUCKILY, I WAS ABLE TO AVOID AN ACCIDENT BECAUSE THERE WAS NO ONCOMING TRAFFIC. I PUT THE TRUCK IN NEUTRAL, PULLED OFF TO THE SIDE OF THE ROAD, AND PUT ON THE EMERGENCY BRAKE ONCE THE VEHICLE CAME TO A STOP. AFTER INSPECTING THE TRUCK, I NOTICED THAT ONE OF THE BRAKE LINES HAD RUPTURED DUE TO SEVERE CORROSION AND ALL OF THE BRAKE LINES ARE CORRODED AND WILL NEED TO BE REPLACED. THE ENTIRE UNDERCARRIAGE INCLUDING THE FRAME, SUSPENSION, BRAKES, AND FUEL LINE HAVE EXTENSIVE CORROSION. THE EXTENT OF THE CORROSION IS VERY SURPRISING BECAUSE I LIVE IN CENTRAL VA AND WE DON'T EXPERIENCE SNOW OR SALT BEING APPLIED TO THE ROAD VERY OFTEN. ALSO I HAVE ONLY USED THE TRUCK TO DRIVE TO WORK WHICH CONSISTED OF MOSTLY INTERSTATE DRIVING. THIS APPEARS TO BE MANUFACTURER DEFECT AND SHOULD BE INVESTIGATE BEFORE SOMEONE IS SERIOUSLY INJURED DUE TO BRAKE FAILURE. *TR
NHTSA ODI #10365372
136,890 miles · Nov 7, 2010
Service Brakes, Hydraulic
BRAKE LINE RUSTED AND FAILED. IT STILL NEEDS TO BE REPLACED. *TR
NHTSA ODI #10364367
165,000 miles · Nov 1, 2010
Service Brakes, Hydraulic
BRAKE LINE FAILURE IN THE FRONT WHEEL CIRCUIT. METAL BRAKE LINE BURST AND BRAKE PEDAL WENT TO THE FLOOR. LUCKILY IT WAS A SECONDARY ROAD AND I WAS ABLE TO USE THE E-BRAKE TO STOP. I ENDED UP REPLACING ALL THE BRAKE LINES BECAUSE THE REAR LINES WERE HEAVILY RUSTED AND CRUMBLING APART AS WELL. *TR
NHTSA ODI #10363636
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.
Illustration