NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
30 reportsClear category filterMileage unknown · Sep 25, 2021
Service BrakesUnknown Or Other
ABS Brakes cut out leaving you with little to no brakes. No warning light appears. This continues on and off over time. Then that ABS warning light came on. When the warning light was on, brakes worked just not ABS. Light would go out and back to the original issue. Took it in to dealership when the light remained on. They rese…
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ABS Brakes cut out leaving you with little to no brakes. No warning light appears. This continues on and off over time. Then that ABS warning light came on. When the warning light was on, brakes worked just not ABS. Light would go out and back to the original issue. Took it in to dealership when the light remained on. They reset the light and told me every thing was fine. And charged me $$$. ABS Brake warning light can right back on. Had the manager drive it. Told me it was fine, brakes worked well. The ABS warning would go in and out. Removed the ABS fuse, so I could depend on being able to stop, without having to worry about the ABS cutting in and out for a few years. Watched for recalls, nothing appeared. Noticed on blogs, others were having the same issue. Took it to a great mechanic! Who verified there were no leaks in the brake lines, replaced one line that had been known to have issues on this type of truck and verified there were no air bubbles on the lines. Still same issue, then replaced the computer system for the ABS. No codes ever came up on the computer system that I can recall. Had more issues with the ABS. Would go to stop, (generally on a hill) then when it came to the final stopping, I had NO BRAKES, had to slam on the brakes to stop. ABS Brake warning lights never came on. My mechanic looked and looked and relooked into this. Found from others that blogged that they had similar issues, that one or both of the ABS Brake sensors were not responding evenly causing an issue. Changed out the sensor. All is good now. This issues could have put and my family in danger a number of times. I was blessed to avoid a few accidents by driving far enough behind people and or had an emergency line to pull into when unable to stop. Hope a recall comes soon for these issues to prevent someone from being killed. These took place from about 2015-fixed 2020. Email me with a report number and where I can upload info at a later date, I will do so.
NHTSA ODI #11434316
265,000 miles · Apr 27, 2019
Service Brakes
I WAS DRIVING HOME FROM WORK ON 421 IN EMINENCE, KY. I PUSHED THE BRAKE PEDAL & I HAD NO BRAKES RIGHT IN FRONT OF HARRY HILL PARK. GM & I ARE VERY LUCKY THAT NO ONE WAS KILLED YESTERDAY. THE BRAKE LINE CORRODED & LEAKED THE BRAKE FLUID, SO WHEN I PUSHED THE PEDAL, IT WENT RIGHT TO THE FLOOR. THE VEHICLE IS PRETTY CLEAN & AFTER C…
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I WAS DRIVING HOME FROM WORK ON 421 IN EMINENCE, KY. I PUSHED THE BRAKE PEDAL & I HAD NO BRAKES RIGHT IN FRONT OF HARRY HILL PARK. GM & I ARE VERY LUCKY THAT NO ONE WAS KILLED YESTERDAY. THE BRAKE LINE CORRODED & LEAKED THE BRAKE FLUID, SO WHEN I PUSHED THE PEDAL, IT WENT RIGHT TO THE FLOOR. THE VEHICLE IS PRETTY CLEAN & AFTER CHECKING MANY BLOGS & YOUTUBE VIDEOS THIS IS A VERY COMMON PROBLEM ON GM TRUCKS. I CHECKED THE RECALLS ON THIS TRUCK & THE TAILGATE CABLE IS RECALLED FOR BREAKING UNDER LOAD DUE TO CORROSION; THIS COULD INJURE SOMEBODY, BUT NOT AS VITAL COMPARED TO THE BRAKING SYSTEM AS SOMEONE COULD DIE IN A HORRIBLE INCIDENT. I WOULD GREATLY APPRECIATE YOUR ATTENTION TO THIS SERIOUS MATTER. THANK YOU
NHTSA ODI #11204085
123,000 miles · Feb 25, 2018
Service Brakes
WHILE OPERATING THE VEHICLE AT APPROXIMATELY 45 MPH, I WAS APPROACHING AN INTERSECTION WHEN I APPLIED THE BRAKES TO SLOW THE VEHICLE. ONE OF THE REAR BRAKE LINES BURSTED CAUSING ME TO HAVE TO ABRUPTLY PUMP THE BRAKE PEDAL TO STOP THE VEHICLE. VERY DANGEROUS SITUATION AS A MARKED SHERIFF'S VEHICLE WITH ITS EMERGENCY LIGHTS AND SI…
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WHILE OPERATING THE VEHICLE AT APPROXIMATELY 45 MPH, I WAS APPROACHING AN INTERSECTION WHEN I APPLIED THE BRAKES TO SLOW THE VEHICLE. ONE OF THE REAR BRAKE LINES BURSTED CAUSING ME TO HAVE TO ABRUPTLY PUMP THE BRAKE PEDAL TO STOP THE VEHICLE. VERY DANGEROUS SITUATION AS A MARKED SHERIFF'S VEHICLE WITH ITS EMERGENCY LIGHTS AND SIREN ACTIVATED WAS TRAVELING AT A HIGH RATE OF SPEED ON THE INTERSECTING HIGHWAY THAT I WAS APPROACHING. THIS IS A KNOWN AND PREVALENT PROBLEM THAT EXISTS WITH GM TRUCKS AND GM IS WELL AWARE OF THE ISSUE BUT DENIES FAULTY PARTS.
NHTSA ODI #11074715
216,000 miles · Sep 25, 2017
Service Brakes
TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL TRAVELED TO THE FLOOR WHEN THE PEDAL WAS DEPRESSED. THE VEHICLE CAME TO A STOP AND THE CONTACT NOTICED FLUID LEAKING UNDERNEATH THE VEHICLE. THE CONTACT HAD THE VEHICLE TOWED TO QUALITY CHEVROLET (1292 ROUTE 9 SOUTH OLD BRIDGE, NJ, 0…
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TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. WHILE DRIVING APPROXIMATELY 30 MPH, THE BRAKE PEDAL TRAVELED TO THE FLOOR WHEN THE PEDAL WAS DEPRESSED. THE VEHICLE CAME TO A STOP AND THE CONTACT NOTICED FLUID LEAKING UNDERNEATH THE VEHICLE. THE CONTACT HAD THE VEHICLE TOWED TO QUALITY CHEVROLET (1292 ROUTE 9 SOUTH OLD BRIDGE, NJ, 08857; 732-316-2600) WHERE IT WAS DIAGNOSED THAT THE BRAKE LINE EXPLODED AND AREAS OF THE BRAKING SYSTEM WERE RUSTED, WHICH CAUSED THE BRAKING SYSTEM TO FAIL. THE VEHICLE'S BRAKING SYSTEM NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 216,000.
NHTSA ODI #11025252
121,950 miles · Sep 5, 2017
Service Brakes
DURING NORMAL STRAIGHT STOP FROM 50 MPH ON RURAL COUNTY ROAD, INTERSECTION WITH 70 MPH CROSSING 4-LANE DIVIDED STATE HIGHWAY, PEDAL WENT TO FLOOR AND BRAKING ABILITY WAS MINIMAL. EMERGENCY BRAKE NEEDED TO COMPLETE THE STOP BEFORE ENTERING CROSSING HIGH-SPEED TRAFFIC. UPON INSPECTION, DISCOVERED BRAKE LINE RUPTURED DUE TO RUST WI…
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DURING NORMAL STRAIGHT STOP FROM 50 MPH ON RURAL COUNTY ROAD, INTERSECTION WITH 70 MPH CROSSING 4-LANE DIVIDED STATE HIGHWAY, PEDAL WENT TO FLOOR AND BRAKING ABILITY WAS MINIMAL. EMERGENCY BRAKE NEEDED TO COMPLETE THE STOP BEFORE ENTERING CROSSING HIGH-SPEED TRAFFIC. UPON INSPECTION, DISCOVERED BRAKE LINE RUPTURED DUE TO RUST WITH MASSIVE INSTANTANEOUS FLUID LOSS.
NHTSA ODI #11021475
204,206 miles · Aug 28, 2017
Parking BrakeService Brakes
TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. WHILE STOPPING THE VEHICLE, THE CONTACT HEARD AN ABNORMAL CLUNKING NOISE. THE PARKING BRAKE WAS ENGAGED, BUT IT FAILED TO RESPOND AND CAUSED THE VEHICLE TO MOVE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC. THE LOCAL DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOT NOTIFIED OF …
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TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. WHILE STOPPING THE VEHICLE, THE CONTACT HEARD AN ABNORMAL CLUNKING NOISE. THE PARKING BRAKE WAS ENGAGED, BUT IT FAILED TO RESPOND AND CAUSED THE VEHICLE TO MOVE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC. THE LOCAL DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOT NOTIFIED OF THE ISSUE. THE FAILURE MILEAGE WAS 204,206.
NHTSA ODI #11020081
112,000 miles · Aug 15, 2017
Service BrakesCrash
BRAKE LINE FAILER DO TO POOR ROUTING FROM FACTORY AND SUBSTANDARD MATERIAL USED ON OEM LINES (BARE STEEL) . ALWAYS REPLACE OEM LINES WITH POWDER COATED AFTERMARKET OR STAINLESS "ONLY" INSPECT "ALL LINES & HARDWARE & CLIPS TO FRAME ECT FOR CORROSION". BRAKE FAILER OCCURED WHILE TOWING ANOTHER AUTO WITH TRAILER ATTACHED NO WARNIN…
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BRAKE LINE FAILER DO TO POOR ROUTING FROM FACTORY AND SUBSTANDARD MATERIAL USED ON OEM LINES (BARE STEEL) . ALWAYS REPLACE OEM LINES WITH POWDER COATED AFTERMARKET OR STAINLESS "ONLY" INSPECT "ALL LINES & HARDWARE & CLIPS TO FRAME ECT FOR CORROSION". BRAKE FAILER OCCURED WHILE TOWING ANOTHER AUTO WITH TRAILER ATTACHED NO WARNING.
NHTSA ODI #11015346
129,130 miles · May 29, 2017
Service Brakes
WHEN COMING TO A STOPLIGHT, I APPLY THE BRAKES AND THE PEDAL GOES DOWN MORE THAN IT SHOULD, BUT I GET STOPPED. WHILE HOLDING THE BRAKE AND WAITING FOR THE LIGHT TO CHANGE THE BRAKE PEDAL GOES SLOWLY TO THE FLOOR. NEXT, I PULL INTO A PARKING LOT AND GET STOPPED. I PUT THE TRUCK IN PARK AN LOOK UNDER THE HOOD AT THE BRAKE MASTER…
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WHEN COMING TO A STOPLIGHT, I APPLY THE BRAKES AND THE PEDAL GOES DOWN MORE THAN IT SHOULD, BUT I GET STOPPED. WHILE HOLDING THE BRAKE AND WAITING FOR THE LIGHT TO CHANGE THE BRAKE PEDAL GOES SLOWLY TO THE FLOOR. NEXT, I PULL INTO A PARKING LOT AND GET STOPPED. I PUT THE TRUCK IN PARK AN LOOK UNDER THE HOOD AT THE BRAKE MASTER CYLINDER, NO FLUID LEAKS, THEN I C LOOK AT EACH WHEEL, NO FLUID LEAKS. I GET TURNED AROUND AND HEAD HOME BECAUSE I KNOW SOMETHING IS WRONG. DRIVING HOME THE BRAKE PEDAL IS SOFT. I'M SOON HOME AND I PARK THE TRUCK BUT WITH THE MOTOR STILL RUNNING, I SLOWLY DEPRESS THE BRAKE PEDAL, IT GOES SLOWLY TO THE FLOOR, NEXT TIME I DEPRESS THE BRAKE PEDAL IT GOES TO THE FLOOR IN A SPLIT SECOND. I GET OUT AND INSPECT UNDER THE TRUCK. I SEE BRAKE FLUID LEAKING FROM THE LINES RUNNING DOWN THE FRAME RIGHT UNDER THE DRIVERS DOOR.
NHTSA ODI #10992038
60,000 miles · Jan 14, 2017
Service BrakesStructure
BRAKE LINES RUSTED , ABS FAILURE ,GAS LINES RUSTED, TRANS COOLING LINES RUSTED. THESE WERE ALL FAILURES THAT NEEDED REPLACEMENT THROUGH THE YEARS I HAVE OWNED IT. NOW FRAME RUSTED AND CRACKED . TRUCK BASICALLY SHOT .
NHTSA ODI #10945232
220,000 miles · Aug 22, 2016
Service Brakes
BRAKE LINES LEAKING FROM CORROSION LEADING TO NO BRAKING
NHTSA ODI #10897720
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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