NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
222 reportsClear category filter98,000 miles · Oct 6, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING, THE ABS SUDDENLY ACTIVATED AT SPEEDS LESS THAN 10 MPH. THE VEHICLE WOULD STOP SHORT WHEN THE CONTACT DEPRESSED THE BRAKE PEDAL DUE TO BRAKE LINE CORROSION. THE CONTACT CALLED THE DEALER WHO STATED THAT THE VEHICLE WAS NOT INCLUDED IN RECALL 05V379000 (SERVICE BR…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING, THE ABS SUDDENLY ACTIVATED AT SPEEDS LESS THAN 10 MPH. THE VEHICLE WOULD STOP SHORT WHEN THE CONTACT DEPRESSED THE BRAKE PEDAL DUE TO BRAKE LINE CORROSION. THE CONTACT CALLED THE DEALER WHO STATED THAT THE VEHICLE WAS NOT INCLUDED IN RECALL 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK). THE MANUFACTURER HAD NOT BEEN NOTIFIED. THE FAILURE MILEAGE WAS APPROXIMATELY 98,000. UPDATED 01/04/11*LJ UPDATED 01/10/11
NHTSA ODI #10359466
138,000 miles · Oct 6, 2010
Electrical SystemFuel System, GasolineService Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHEN ATTEMPTING TO BRAKE, THE VEHICLE WOULD CONTINUE MOVING ANOTHER FIVE FEET BEFORE THE BRAKES WOULD GRAB. ALSO, THE CONTACT WAS DRIVING AT 60 MPH ON THE HIGHWAY WHEN THE VEHICLE SUDDENLY COMPLETELY SHUT DOWN. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEA…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHEN ATTEMPTING TO BRAKE, THE VEHICLE WOULD CONTINUE MOVING ANOTHER FIVE FEET BEFORE THE BRAKES WOULD GRAB. ALSO, THE CONTACT WAS DRIVING AT 60 MPH ON THE HIGHWAY WHEN THE VEHICLE SUDDENLY COMPLETELY SHUT DOWN. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALERSHIP WHERE THE CONTACT WAS INFORMED THAT A NEW STARTER AND NEW FUEL SENDING UNIT NEEDED TO BE INSTALLED. THE VEHICLE WAS REPAIRED AT THAT TIME. THE REAR SEAL ON THE ENGINE WAS LEAKING OIL; THE DEALER REPAIRED THE SEAL. THE CONTACT ALSO NOTICED THAT THE ROTORS WERE PEELING; THE CONTACT REPAIRED THE PROBLEM AT HIS EXPENSE. THE BRAKING ISSUE WAS THE MOST RECENT PROBLEM AND HAD NOT BEEN CORRECTED AT THE TIME OF THE COMPLAINT. THE MANUFACTURER HAD NOT BEEN NOTIFIED OF THE BRAKE PROBLEM. THE CURRENT MILEAGE WAS APPROXIMATELY 140,000. THE FAILURE MILEAGE WAS APPROXIMATELY 138,000.
NHTSA ODI #10359444
121,500 miles · Sep 30, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 40 MPH AND ATTEMPTING TO STOP AT A TRAFFIC LIGHT, THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD. THE CONTACT STATED THAT THE VEHICLE MOVED THROUGH THE TRAFFIC LIGHT AND THEN STOPPED. THE CONTACT DROVE HOME AND NOTICED THAT THE BRAKE LINES WERE CORRODED…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 40 MPH AND ATTEMPTING TO STOP AT A TRAFFIC LIGHT, THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD. THE CONTACT STATED THAT THE VEHICLE MOVED THROUGH THE TRAFFIC LIGHT AND THEN STOPPED. THE CONTACT DROVE HOME AND NOTICED THAT THE BRAKE LINES WERE CORRODED; HE REPLACED THE ENTIRE BRAKE LINE HIMSELF. THE FAILURE MILEAGE WAS APPROXIMATELY 121,500 AND THE CURRENT MILEAGE WAS 122,786.
NHTSA ODI #10358436
75,000 miles · Sep 27, 2010
Service Brakes, Hydraulic
BRAKE LINE FAILURE. HAPPENED TO 1 LINE TWICE WITHIN A YEAR, AND THE FOLLOWING YEAR ANOTHER LINE BROKE. ALL LINES HAVE BEEN REPLACED. THIS IS ON A 1999 CHEVY PICK-UP. THE LINES WERE SO BAD IN 10 YEARS, HAD TO BE REPLACED. I BELIEVE THIS IS A SAFETY ISSUE, OTHER VEHICLES I'VE HAD AT LEAST 20 YR, NEVER HAPPENED. I'VE SEEN A 2003 C…
Read full complaint
BRAKE LINE FAILURE. HAPPENED TO 1 LINE TWICE WITHIN A YEAR, AND THE FOLLOWING YEAR ANOTHER LINE BROKE. ALL LINES HAVE BEEN REPLACED. THIS IS ON A 1999 CHEVY PICK-UP. THE LINES WERE SO BAD IN 10 YEARS, HAD TO BE REPLACED. I BELIEVE THIS IS A SAFETY ISSUE, OTHER VEHICLES I'VE HAD AT LEAST 20 YR, NEVER HAPPENED. I'VE SEEN A 2003 CHEVY PICKUP THAT IN A SHORT PERIOD OF TIME WILL ALSO NEED REPLACED. I BELIEVE THE MANUFACTURES HAVE BOUGHT CHEAP STEEL LINES FOR THESE VEHICLES AND THIS TO ME IS A SAFETY ISSUE AND I BELIEVE THIS SHOULD BE CORRECTED AS BRAKES ARE VERY IMPORTANT ON ANY VEHICLES ROLLING DOWN THE HIGHWAY. CANNOT UNDERSTAND WHY STAINLESS STEEL OR OTHER LINE THAT IS SUBJECT TO THE WEATHER ARE NOT ON THESE VEHICLES AS THE EXTRA COST WOULD NOT BE THAT MUCH PER VEHICLE, IN THE LONG RUN IT WOULD BE CHEAPER AND SAFER TO HAVE THESE INSTALLED ON THESE VEHICLES. *TR
NHTSA ODI #10357942
87,000 miles · Sep 23, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING, THE BRAKES FAILED AND WOULD NOT ENGAGE WHEN HE ATTEMPTED TO SLOW DOWN. THE VEHICLE WAS INSPECTED BY A MECHANIC WHO STATED THAT THE BRAKE LINES WERE CORRODED AND COVERED WITH RUST. THE VEHICLE WAS BEING REPAIRED AT THE TIME OF THE COMPLAIN…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING, THE BRAKES FAILED AND WOULD NOT ENGAGE WHEN HE ATTEMPTED TO SLOW DOWN. THE VEHICLE WAS INSPECTED BY A MECHANIC WHO STATED THAT THE BRAKE LINES WERE CORRODED AND COVERED WITH RUST. THE VEHICLE WAS BEING REPAIRED AT THE TIME OF THE COMPLAINT. THE CONTACT CALLED THE MANUFACTURER WHO OFFERED NO ASSISTANCE. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 87,000.
NHTSA ODI #10357132
117,000 miles · Sep 21, 2010
Service Brakes, Hydraulic
2 REAR BRAKE LINES BURST WHEN APPLYING BRAKES. NARROWLY AVOIDED ACCIDENT. *TR
NHTSA ODI #10356889
135,000 miles · Sep 15, 2010
Service Brakes, Hydraulic
MY 1999 CHEVY SILVERADO 1500, 2 WHEEL DRIVE BRAKE LINES THAT RUN UNDER THE DRIVERS SEAT ON THE UNDERCARRAIGE ARE COMPLETLEY RUSTED AND 1 OF THEM BLEW OUT TODAY, NO CRASH LUCKALLY JUST MOMENTARY PANIC, A 11 YEAR OLD VEHICLE SHOULD NOT BE RUPTURING BRAKE LINES FROM RUST. I WILL HAVE TO REPLCE IT MYSELF DO TO MONETARY REASONS AND Y…
Read full complaint
MY 1999 CHEVY SILVERADO 1500, 2 WHEEL DRIVE BRAKE LINES THAT RUN UNDER THE DRIVERS SEAT ON THE UNDERCARRAIGE ARE COMPLETLEY RUSTED AND 1 OF THEM BLEW OUT TODAY, NO CRASH LUCKALLY JUST MOMENTARY PANIC, A 11 YEAR OLD VEHICLE SHOULD NOT BE RUPTURING BRAKE LINES FROM RUST. I WILL HAVE TO REPLCE IT MYSELF DO TO MONETARY REASONS AND YES I WILL SAVE THE PART AND TAKE PICTURES BEFORE I TOUCH IT. *TR
NHTSA ODI #10355839
41,464 miles · Sep 15, 2010
Service Brakes, Hydraulic
WE HAVE A 1999 CHEVROLET Z71 PICKUP TRUCK WHICH WE BOUGHT NEW ON JUNE 18, 1999. THE TRUCK NEVER HAD A NEW CAR VEHICLE STICKER ON THE WINDOW SO WE SHOULD HAVE KNOWN THERE WAS SOMETHING WRONG RIGHT OFF THE BAT. SO FAR WE HAVE REPLACED THE BRAKE COMPONENTS (ROTORS, CALIPERS, ETC.) FOUR TIMES. THE FRONT BRAKE HOSE ALSO ROTTED OFF O …
Read full complaint
WE HAVE A 1999 CHEVROLET Z71 PICKUP TRUCK WHICH WE BOUGHT NEW ON JUNE 18, 1999. THE TRUCK NEVER HAD A NEW CAR VEHICLE STICKER ON THE WINDOW SO WE SHOULD HAVE KNOWN THERE WAS SOMETHING WRONG RIGHT OFF THE BAT. SO FAR WE HAVE REPLACED THE BRAKE COMPONENTS (ROTORS, CALIPERS, ETC.) FOUR TIMES. THE FRONT BRAKE HOSE ALSO ROTTED OFF O IT. TWO WEEKS AGO WE HAD TO REPLACE ONE OF THE REAR STEEL BRAKE LINES BECAUSE IT HAD CORRODED THROUGH AND WAS LEAKING BRAKE FLUID - WOULD NOT STOP AT ALL. MY WIFE HAD TO DRIVE IT THAT WAY FOR OVER 40 MILES ON THE INTERSTATE, INTERMITTENTLY PUTTING ON THE EMERGENCY FLASHERS. THE ENTIRE UNDERCARRIAGE HAS BEEN RUSTED AND CORRODED FROM THE DAY WE BOUGHT IT. THE TRUCK ONLY HAS 41,000 MILES ON IT. NOW WHEN STOPPING AT A SLOW SPEED LIKE ON AN EXIT RAMP STOP SIGN, THE TRUCK STARTS TO PULSATE AND THE BRAKES FEEL LIKE THEY WON'T STOP. IT IS AT THE REPAIR SHOP NOW. HE CANNOT FIND ANYTHING WRONG WITH THE BRAKES OR WHEEL SENSORS ACCORDING TO HIS COMPUTER. WHAT CAN BE DONE ABOUT THIS? IS THERE SOMEONE WE CAN GO TO OR TALK TO? SOMEONE AT CHEVROLET? ANOTHER THING - THE TRUCK IS GARAGED EVERY OTHER MONTH AND RARELY SEES BAD WEATHER. IF IT DOES - MY HUSBAND TAKES IT THROUGH THE CAR WASH FOR UNDERBODY CLEANING. *TR
NHTSA ODI #10355832
97,603 miles · Sep 15, 2010
Service Brakes, Hydraulic
BRAKE LINE (LOCATED UNDER VEHICLE DRIVER'S SIDE DOOR) CAME APART AT CONNECTOR. CAUSING COMPLETE LOSS OF BRAKES. AS I WAS ALMOST STOPPED THERE WAS NO DAMAGE CAUSED. I HAD NO PRIOR WARNING TO FAILURE. *TR
NHTSA ODI #10355666
105,035 miles · Sep 9, 2010
Service Brakes, Hydraulic
COMPLETE FAILURE OF HYDRAULIC BRAKE SYSTEM. STEEL BRAKE LINE RUSTED THROUGH. *TR
NHTSA ODI #10354649
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