NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter182,855 miles · Aug 24, 2011
Service Brakes, Hydraulic
MY WIFE AND I WERE GETTING READY TO GO INTO TOWN. WHEN I STEPPED ON THE BRAKE TO PUT THE TRUCK INTO REVERSE THE PEDAL WENT STRAIGHT TO THE FLOOR. I TRIED IT AGAIN AND THE SAME THING HAPPENED. I GOT OUT AND LOOKED UNDER THE TRUCK. RIGHT UNDER THE DRIVERS DOOR I SAW ALOT OF FLUID LEAKING. UPON CLOSER INSPECTION THE BRAKE LINES LEA…
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MY WIFE AND I WERE GETTING READY TO GO INTO TOWN. WHEN I STEPPED ON THE BRAKE TO PUT THE TRUCK INTO REVERSE THE PEDAL WENT STRAIGHT TO THE FLOOR. I TRIED IT AGAIN AND THE SAME THING HAPPENED. I GOT OUT AND LOOKED UNDER THE TRUCK. RIGHT UNDER THE DRIVERS DOOR I SAW ALOT OF FLUID LEAKING. UPON CLOSER INSPECTION THE BRAKE LINES LEADING TO THE ABS UNIT ARE VERY RUSTY, SO MUCH SO THAT ONE ACTUALLY BURST. I HAD DRIVEN THE TRUCK EARLIER IN THE DAY AND DIDN'T NOTICE ANYTHING WRONG, NO SPONGY BRAKES OR WARNING LIGHTS. I TRIED CONTACTING GM. ALL THEY WANTED TO DO IS HAVE ME TOW THE TRUCK TO A DEALER AND HAVE THEM INSPECT IT. I LATER CALLED THE DEALER AND TALKED WITH THE SERVICE MANAGER, HE SAID GM PROBABLY WOULDN'T PAY ANYTHING TOWARDS FIXING THE BRAKE LINES. AS OF YET I HAVEN'T REPAIRED THE RUSTY LINES BUT I AM GOING TO SAVE THEM IN CASE THERE IS A RECALL SO I CAN SHOW THEM TO SOMEONE. *TR
NHTSA ODI #10421384
93,000 miles · Aug 19, 2011
Service Brakes, Hydraulic
WHILE DRIVING, BRAKES FAILED. TOTAL LOSS OF BRAKE FLUID DUE TO RUSTED METAL LINES. I WAS ABLE TO AVOID HITTING OTHERS BY TURNING ON TO A SIDE STREET AND USING THE E-BRAKE. IF THIS HAD HAPPENED HALF A MILE SOONER IT WOULD HAVE BEEN A MUCH DIFFERENT SCENARIO. *TR
NHTSA ODI #10420108
137,880 miles · Aug 19, 2011
Service Brakes, HydraulicStructure
GM PICKUP TRUCKS -EXCESSIVE RUST TO BRAKE LINES, FRAME & CROSS-MEMBERS. I SUGGEST A METALLUGICAL ANALYSIS OF SAID PARTS FROM LATE '90S THRU 2007 VS '60S,'70'S, & '80'S MODELS WHICH DID NOT EXHIBIT EARLY FAILURE. THE EXCESSIVE RUST TO BRAKE LINES & UNDERCARRIAGE IS A SAFETY ISSUE AND IS DANGEROUS TO THE OCCUPANTS OF THE VEHICLE…
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GM PICKUP TRUCKS -EXCESSIVE RUST TO BRAKE LINES, FRAME & CROSS-MEMBERS. I SUGGEST A METALLUGICAL ANALYSIS OF SAID PARTS FROM LATE '90S THRU 2007 VS '60S,'70'S, & '80'S MODELS WHICH DID NOT EXHIBIT EARLY FAILURE. THE EXCESSIVE RUST TO BRAKE LINES & UNDERCARRIAGE IS A SAFETY ISSUE AND IS DANGEROUS TO THE OCCUPANTS OF THE VEHICLE AND OTHER MOTORIST & PEDESTRIANS WHEN FAILURE OCCURS, NOT IF, BUT WHEN IT OCCURS. THE NHTSA HAS BEEN AWARE SINCE 2009 AND IT APPEARS TO THE PUBLIC THAT POLITICS IS IN PLAY. NO RESULTS HAVE SURFACED, BUT PLENTY OF DANGEROUSLY RUSTED & UNSAFE VEHICLES TRAVEL THE ROAD AMONGST YOUR LOVED ONES. *TR
NHTSA ODI #10420096
170,000 miles · Aug 13, 2011
Service Brakes, Hydraulic
2000 SILVERADO 1500 LONG BED REG.CAB.BRAKE FAILURE DUE TO CORROSION. LINES COMPLETELY RUSTED OUT. IN 5MIN RESEARCH, FOUND HUNDREDS W/SAME ISSUE. COSTS TOO MUCH TO FIX,CANT AFFORD A NEW TRUCK. WHAT IS THE AVG. PERSON SUPPOSED TO DO? GM ID OBVIOUSLY AWARE OF ISSUE AND HOW DANGEROUS IT IS. PEDAL LOST WHILE DRIVING. NO WARNING LIGHT…
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2000 SILVERADO 1500 LONG BED REG.CAB.BRAKE FAILURE DUE TO CORROSION. LINES COMPLETELY RUSTED OUT. IN 5MIN RESEARCH, FOUND HUNDREDS W/SAME ISSUE. COSTS TOO MUCH TO FIX,CANT AFFORD A NEW TRUCK. WHAT IS THE AVG. PERSON SUPPOSED TO DO? GM ID OBVIOUSLY AWARE OF ISSUE AND HOW DANGEROUS IT IS. PEDAL LOST WHILE DRIVING. NO WARNING LIGHT FOR LOSS OF SYSTEM. PROBLEM NEEDS RESOLVED OR AT LEAST ADDRESSED. *TR
NHTSA ODI #10419295
103,000 miles · Aug 11, 2011
Service Brakes, Hydraulic
I OWN A 2000 CHEVY SILVERADO 1500. THE VEHICLE HAS EXPERIENCED THREE SEPARATE BRAKE FAILURES DUE TO SEVERELY CORRODED/RUSTED BRAKE LINES. THE FIRST OCCURRED IN 2008, THE SECOND IN 2010, AND THE MOST RECENT WAS LAST WEEK. WE HAVE HAD TO REPLACE SEVERAL OF THE LINES AS A RESULT. LUCKILY, THE LOSS OF BREAKS HAS HAPPENED IN AREA…
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I OWN A 2000 CHEVY SILVERADO 1500. THE VEHICLE HAS EXPERIENCED THREE SEPARATE BRAKE FAILURES DUE TO SEVERELY CORRODED/RUSTED BRAKE LINES. THE FIRST OCCURRED IN 2008, THE SECOND IN 2010, AND THE MOST RECENT WAS LAST WEEK. WE HAVE HAD TO REPLACE SEVERAL OF THE LINES AS A RESULT. LUCKILY, THE LOSS OF BREAKS HAS HAPPENED IN AREAS/SITUATIONS WHERE WE WERE ABLE TO AVOID A CRASH. THERE IS ABSOLUTELY NO WARNING WHEN THIS OCCURS, AND CONTRARY TO WHAT GM HAS SAID, NO BRAKE WARNING LIGHT TURNS ON TO WARN THE DRIVER OF THE LOSS OF BRAKE LINE PRESSURE/FLUID. THIS PROBLEM APPEARS TO BE WIDESPREAD, AND NEEDS TO BE ADDRESSED AS SOON AS POSSIBLE. THANK YOU. THE LATEST FAILURE OCCURRED AT 102,000 MILES, THE OTHERS OCCURRED AT APPROX 87,000 AND 93,000 MILES VIN # = [XXX]. *TR
NHTSA ODI #10418555
Mileage unknown · Jul 28, 2011
Electrical SystemParking BrakeService Brakes, Hydraulic
ABS AND PARKING BRAKE LIGHTS WILL NOT GO OFF. DEALER HAS TOLD ME THAT THE ANTI-LOCK BRAKES WILL NOT WORK IN THIS CONDITION. STATE OF COLORADO WILL NOT ALLOW MY VEHICLE TO PASS THE REQUIRED EMISSIONS TEST WITH THE VEHICLE IN THIS CONDITION. CHECKED IF THERE WAS A RECALL AND THERE WAS BUT MY STATE, COLORADO IS NOT INCLUDED IN T…
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ABS AND PARKING BRAKE LIGHTS WILL NOT GO OFF. DEALER HAS TOLD ME THAT THE ANTI-LOCK BRAKES WILL NOT WORK IN THIS CONDITION. STATE OF COLORADO WILL NOT ALLOW MY VEHICLE TO PASS THE REQUIRED EMISSIONS TEST WITH THE VEHICLE IN THIS CONDITION. CHECKED IF THERE WAS A RECALL AND THERE WAS BUT MY STATE, COLORADO IS NOT INCLUDED IN THIS RECALL (NHTSA CAMPAIGN ID NUMBER: 05V39000). *TR
NHTSA ODI #10415458
93,622 miles · Jul 16, 2011
Service Brakes, Hydraulic
2000 CHEVY SILVERADO BRAKE PEDAL WENT ALL THE WAY TO FLOOR AND BRAKES BARELY WORKED. THIS HAPPENED AT HIGHWAY SPEEDS AND ALMOST CAUSED ME TO REAR END THE CAR IN FRONT OF ME.PULLED OFF THE HIGHWAY AND NOTICED FLUID LEAKING FROM UNDER THE FRONT OF THE TRUCK. I CRAWLED UNDERNEATH AND SAW THE FLUID COMING FROM THE BRAKE LINE GOING T…
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2000 CHEVY SILVERADO BRAKE PEDAL WENT ALL THE WAY TO FLOOR AND BRAKES BARELY WORKED. THIS HAPPENED AT HIGHWAY SPEEDS AND ALMOST CAUSED ME TO REAR END THE CAR IN FRONT OF ME.PULLED OFF THE HIGHWAY AND NOTICED FLUID LEAKING FROM UNDER THE FRONT OF THE TRUCK. I CRAWLED UNDERNEATH AND SAW THE FLUID COMING FROM THE BRAKE LINE GOING TO THE FRONT PASSENGER WHEEL. BRAKE LINE WAS SEVERELY CORRODED AND THE AREA WHERE THE LEAK IS OCCURRING CAN BE SQUEEZED TOGETHER WITH FINGER PRESSURE. INSPECTED THE OTHER BRAKE LINES AND THEY ALL APPEAR CORRODED WITH SEVERAL PLACES BEING VERY WEAK AND CAN BE SQUEEZED TOGETHER WITH FINGER PRESSURE. SEARCHING ON THE INTERNET, THERE SEEMS TO BE PLENTY OF OTHER PEOPLE WHO HAVE EXPERIENCED THE SAME ISSUE. SOME WITH MORE DISASTROUS RESULTS.I AM LOOKING TO REPLACE ALL THE BRAKE LINES WITH STAINLESS STEEL. *TT
NHTSA ODI #10413141
114,000 miles · Jul 15, 2011
Service Brakes, Hydraulic
I OWN A 2000 CHEVY 1500 TRUCK. ON JUNE 24, 2011, I WAS ON THE HIGHWAY, ON MY WAY TO WORK AND THE PEDDLE FOR THE BREAKS WENT ALL THE WAY TO THE FLOOR. NO BRAKES. LUCKILY I AM A POLICE OFFICER AND WAS TRAINED ON WHAT TO DO IN THIS SITUATION AND I FOUND IT PRIOR TO NEEDING THEM FOR AN ABRUPT STOP. UPON CLOSER INSPECTION, I FOUND TH…
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I OWN A 2000 CHEVY 1500 TRUCK. ON JUNE 24, 2011, I WAS ON THE HIGHWAY, ON MY WAY TO WORK AND THE PEDDLE FOR THE BREAKS WENT ALL THE WAY TO THE FLOOR. NO BRAKES. LUCKILY I AM A POLICE OFFICER AND WAS TRAINED ON WHAT TO DO IN THIS SITUATION AND I FOUND IT PRIOR TO NEEDING THEM FOR AN ABRUPT STOP. UPON CLOSER INSPECTION, I FOUND THE BRAKE LINE TO THE REAR AXEL HAD RUSTED THROUGH UNDER THE CAB. I REMOVED THE BED OF THE TRUCK AND REPLACED THE LINE. I THEN EXAMINED THE OTHER BRAKE LINES AND FOUND ALL THE BRAKE LINES TO BE COMPLETELY RUSTED. THIS RUSTING IS PREMATURE FOR A 2000 YEAR VEHICLE. MY 2001 VOLKSWAGEN'S BRAKE LINES STILL LOOK LIKE NEW AND IT HAS FIFTY THOUSAND MORE MILES. THIS PREMATURE RUSTING IS A VERY SERIOUS PROBLEM. IF I NEEDED THE BRAKES FOR AN EMERGENCY STOP, OR DID NOT KNOW WHAT TO DO IN THE EVENT OF NO BRAKES, THERE WOULD HAVE BEEN SERIOUS PERSONAL OR PROPERTY DAMAGE. GM KNOWS THEY HAVE A PROBLEM WITH THE BRAKE COMPONENTS ON THE TRUCKS THEY MADE. THEY JUST HAVE NOT HAD ANYONE MAKE THEM DO ANYTHING ABOUT IT. YES I HAVE THE OLD LINES. *TT
NHTSA ODI #10412400
131,320 miles · Jul 5, 2011
Service Brakes, Hydraulic
COMPLETE BRAKE FAILURE DUE TO BRAKE LINE RUPTURE UNDER DRIVER'S SIDE FRAME RAIL. *KB
NHTSA ODI #10410554
124,000 miles · Jul 5, 2011
Service Brakes, Hydraulic
ANTI-LOCK BRAKES CHATTERED AND FAILED TO STOP MY 1500 SILVERADO ON AN DRY SUNNY DAY, HAD TO USE EMERGENCY BRAKE. IN 2005 ALL OF THE BRAKE LINES RUSTED THRU. *KB
NHTSA ODI #10410521
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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