NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
40 reportsClear category filter122,000 miles · Jun 27, 2014
Service Brakes
TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKE PEDAL HAD TO BE DEPRESSED REPEATEDLY IN ORDER FOR THE VEHICLE TO COME TO A STOP. THE CONTACT MENTIONED THAT UPON STOPPING, THE VEHICLE LUNGED FORWARD. THE FAILURE OCCURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 10 MPH, THE BRAKE PEDAL HAD TO BE DEPRESSED REPEATEDLY IN ORDER FOR THE VEHICLE TO COME TO A STOP. THE CONTACT MENTIONED THAT UPON STOPPING, THE VEHICLE LUNGED FORWARD. THE FAILURE OCCURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO REPLACED BOTH FRONT WHEEL ABS SENSORS. THE FAILURE RECURRED AND THE VEHICLE HAD NOT BEEN REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 122,000.
NHTSA ODI #10606424
84,000 miles · May 25, 2014
Service Brakes
AFTER BACKING MY TRUCK INTO MY DRIVEWAY, I WAS REACHING INTO THE BACK SEAT WHILE PRESSING ON THE BRAKE PEDAL. ALL OF A SUDDEN MY FOOT ON THE BRAKE PEDAL WENT TO THE FLOOR. UPON INVESTIGATING I FOUND THAT I HAD A HOLE IN MY REAR DRIVER SIDE BRAKE LINE. IT WAS COMPLETELY RUSTED OUT. FURTHER INVESTIGATING SHOWED THAT ALL THE BR…
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AFTER BACKING MY TRUCK INTO MY DRIVEWAY, I WAS REACHING INTO THE BACK SEAT WHILE PRESSING ON THE BRAKE PEDAL. ALL OF A SUDDEN MY FOOT ON THE BRAKE PEDAL WENT TO THE FLOOR. UPON INVESTIGATING I FOUND THAT I HAD A HOLE IN MY REAR DRIVER SIDE BRAKE LINE. IT WAS COMPLETELY RUSTED OUT. FURTHER INVESTIGATING SHOWED THAT ALL THE BRAKE LINES ARE VERY RUSTY AND IN POOR CONDITION. I HAVE REPAIRED THE RUPTURED LINE, BUT AM FEARFUL OF ANOTHER RUPTURE. I BELIEVE THAT GM SHOULD BE REQUIRED TO REPLACE ALL THE BRAKE LINES ON THIS VEHICLE. WHY DOES GM NOT USE HIGH QUALITY STAINLESS STEEL BRAKE LINES FOR ALL VEHICLES? ALL VEHICLE MAKERS SHOULD BE REQUIRED TO USE HIGH QUALITY STAINLESS STEEL FOR BRAKE LINES AND BRAKE COMPONENTS SUSCEPTIBLE TO RUST. *TR
NHTSA ODI #10593981
84,000 miles · Dec 27, 2013
Power TrainService BrakesWheels
WAS ABOUT TO GO SHOPPING FOR CHRISTMAS GIFTS, STEPPED ON BRAKE AT TOP OF COURT AND THE PEDDLE WENT TO FLOOR. NOT JUST LOSS OF HYDROS FULL ON BRAKE MALFUNCTION , NO BRAKES AT ALL. I LIVE IN NEW YORK AND TRUCK WAS PURCHASED FROM CONNECTICUT. DECIDED TO MAKE LEFT TURN AND MISSED GETTING HIT BY 18 WHEELER BY INCHES. I AM LUCKY TO BE…
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WAS ABOUT TO GO SHOPPING FOR CHRISTMAS GIFTS, STEPPED ON BRAKE AT TOP OF COURT AND THE PEDDLE WENT TO FLOOR. NOT JUST LOSS OF HYDROS FULL ON BRAKE MALFUNCTION , NO BRAKES AT ALL. I LIVE IN NEW YORK AND TRUCK WAS PURCHASED FROM CONNECTICUT. DECIDED TO MAKE LEFT TURN AND MISSED GETTING HIT BY 18 WHEELER BY INCHES. I AM LUCKY TO BE ALIVE TO BE TYPING THIS NOW, NO THANKS TO GM. NO WARNING LIGHTS NOTHING AT ALL JUST NO BRAKES. TO ADD EMERGENCY BRAKE DID NOT WORK. *TR
NHTSA ODI #10557466
95,000 miles · Nov 29, 2013
Service Brakes
SUDDEN RUPTURE OF BRAKE LINE DUE TO HEAVY CORROSION. RUPTURE WAS EVIDENT ALONG A SEAM IN THE BRAKE LINE FROM THE MANUFACTURING PROCESS. RUPTURE GREATLY REDUCED THE BRAKING CAPACITY. RENDERED VEHICLE UNSAFE TO DRIVE. *TR
NHTSA ODI #10554144
69,100 miles · Sep 3, 2013
Service BrakesService Brakes, Hydraulic
BRAKE FAILURE DUE TO SEVERELY RUSTED BRAKE LINE AT DRIVER SIDE REAR WHEEL. RUST IS SEVERE ON ALL SURFACES UNDERNEATH VEHICLE. WILL REQUIRE COMPLETE REPLACEMENT OF ALL BRAKE LINES AND OTHER ASSORTED BRAKE COMPONENTS. ABS WAS MALFUNCTIONING PRIOR TO BRAKE LINE RUPTURE, LIKELY DUE TO CORROSION WITHIN WHEEL/HUB ASSEMBLY. THIS MA…
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BRAKE FAILURE DUE TO SEVERELY RUSTED BRAKE LINE AT DRIVER SIDE REAR WHEEL. RUST IS SEVERE ON ALL SURFACES UNDERNEATH VEHICLE. WILL REQUIRE COMPLETE REPLACEMENT OF ALL BRAKE LINES AND OTHER ASSORTED BRAKE COMPONENTS. ABS WAS MALFUNCTIONING PRIOR TO BRAKE LINE RUPTURE, LIKELY DUE TO CORROSION WITHIN WHEEL/HUB ASSEMBLY. THIS MALFUNCTION IS KNOWN TO GMC, AND OCCURS BY THE ABS ERRONEOUSLY SENSING WHEEL STOPPAGE AT LOW SPEED, CAUSING THE SYSTEM TO ACTIVATE AND INABILITY TO STOP. THIS HAS CAUSED NEAR MISSES IN PARKING LOT SITUATIONS, THUS THE ABS HAS NECESSARILY BEEN DISABLED UNTIL REPAIR (PULLING FUSE). NOT THE KIND OF ISSUES A LOW MILEAGE TRUCK SHOULD BE EXPERIENCING. *JB
NHTSA ODI #10538456
187,463 miles · Aug 20, 2013
Electrical SystemService Brakes
MY ABS CONTROL MODULE IS NOT FUNCTIONING PROPERLY. ABS IS DISABLED AND COSTS $1000 TO REPLACE. THIS IS A SAFETY HAZARD AS THE BRAKES CAN LOCK UP AT ANY MOMENT OR ABS IS DISABLED AND MAY CAUSE BRAKES TO LOCK UP. THE ABS LIGHT ON DASHBOARD IS ON CONTINUOUSLY AND THE MODULE WILL NEED TO BE REPLACED OR FURTHER DAMAGE WILL OCCUR. *T…
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MY ABS CONTROL MODULE IS NOT FUNCTIONING PROPERLY. ABS IS DISABLED AND COSTS $1000 TO REPLACE. THIS IS A SAFETY HAZARD AS THE BRAKES CAN LOCK UP AT ANY MOMENT OR ABS IS DISABLED AND MAY CAUSE BRAKES TO LOCK UP. THE ABS LIGHT ON DASHBOARD IS ON CONTINUOUSLY AND THE MODULE WILL NEED TO BE REPLACED OR FURTHER DAMAGE WILL OCCUR. *TR
NHTSA ODI #10536388
102,000 miles · Aug 17, 2013
Service Brakes
DRIVING LESS THAN A HALF MILE FROM HOME WHEN I APPLIED THE BRAKES AND EXPERIENCED TOTAL FAILURE WITHOUT WARNING. UPON INSPECTION BRAKE LINES WERE RUSTED AND ONE FAILED. AS I WAS REMOVING TO REPLACE ALL OF THEM DUE TO THE RUST CONDITIONS, SEVERAL OF THEM WERE BRITTLE ENOUGH TO BREAK UPON MANIPULATION. *TR
NHTSA ODI #10535889
134,788 miles · May 25, 2013
Service Brakes
MY WIFE APPLIED BRAKES TO STOP AT A RED LIGHT AND PEDAL WENT TO FLOOR WITH NO WARNING LIGHT AND WITH THE GRACE OF GOD IT STOPPED BEFORE WE WERE T-BONED IN BUSY INTERSECTION. AMAZING THAT GM CAN PUT STAINLESS STEEL EXHAUST WHICH BY THE WAY IS STILL ON THE TRUCK BUT NOT THE BRAKE LINES!!!!!!! *TR
NHTSA ODI #10513496
135,000 miles · May 6, 2013
Service Brakes
THE BRAKE LINE THAT RUNS ABOVE THE GAS TANK IS LEAKING. I HAVE NO BRAKE PRESSURE. THIS HAS BEEN A WELL DOCUMENTED GENERAL MOTORS PROBLEM. *TR
NHTSA ODI #10510766
98,000 miles · Dec 3, 2012
Fuel System, GasolineService Brakes
TWO THINGS STARTED TO HAPPEN 1. THE TRUCK WHEN COMING TO A STOP OF A SPEED OF LESS THEN 25 MPH STARTED TO LOSE ITS BRAKES AND FEEL SPONGY. THIS CONTINUED UNTIL I GOT IT IN THE SHOP WHICH WAS ABOUT TWO DAYS. 2. THE TRUCK STARTED TO RUN VERY ROUGH AND THE ENGINE LIGHT WAS COMING ON AT THE SAME TIME AS WELL. AFTER I GOT IT IN THE…
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TWO THINGS STARTED TO HAPPEN 1. THE TRUCK WHEN COMING TO A STOP OF A SPEED OF LESS THEN 25 MPH STARTED TO LOSE ITS BRAKES AND FEEL SPONGY. THIS CONTINUED UNTIL I GOT IT IN THE SHOP WHICH WAS ABOUT TWO DAYS. 2. THE TRUCK STARTED TO RUN VERY ROUGH AND THE ENGINE LIGHT WAS COMING ON AT THE SAME TIME AS WELL. AFTER I GOT IT IN THE SHOP AND THEY GOT IT UP ON A LIFT THEY FOUND THAT ALL OF THE BRAKE LINES AND FUEL LINES WERE ALL MOST RUSTED THROUGH AND STARTING TO LEAK. THEY HAD TO REPLACE ALL OF THE BRAKE LINES, FUEL LINES AND SINCE THEY HAD THE FUEL TANK DOWN THEY REPLACED THE FUEL PUMP BECAUSE THEY FOUND RUST AND DIRT IN THE OLD PUMP. THE SHOP MECHANIC SAID THE LINES WERE READY TO FAIL AT ANY MOMENT. THE CHEVY DEALER I BOUGHT THE TRUCK OFF OF JUST FOUR MONTHS EARLY HAD JUST INSPECTED IT AND HAD SEEN THE RUSTED LINES AND EVEN REPAIRED A PIECE OF ONE OF THE FUEL LINES BUT LEFT THE REST GO TO FAIL DOWN THE ROAD, THEY GAVE ME LITTLE TO NO HELP. THIS IS A HUGE PROBLEM, DANGEROUS AS WELL AS VERY EXPENSIVE ONE AND NEEDS LOOKED INTO. IS THERE ANY HELP I CAN GET FOR THIS PROBLEM?? *TR
NHTSA ODI #10487149
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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