NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
59 reportsClear category filter148,366 miles · Jul 15, 2014
Service Brakes, Hydraulic
GOT IN TRUCK STARTED IT, DROVE TO THE TOP OF MILE DRIVEWAY APPLIED BRAKES. THE PEDAL WENT TO THE FLOOR. I ROLLED INTO THE ROAD BEFORE I COULD APPLY THE PARKING BRAKE. AN ONCOMING CAR HAD TO BRAKE, SO AS TO AVOID HITTING ME. I GOT THE TRUCK BACK IN TO THE DRIVEWAY AND RODE THE PARK BRAKE DOWN THE DRIVE. CALLED A WRECKER TO TOW T…
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GOT IN TRUCK STARTED IT, DROVE TO THE TOP OF MILE DRIVEWAY APPLIED BRAKES. THE PEDAL WENT TO THE FLOOR. I ROLLED INTO THE ROAD BEFORE I COULD APPLY THE PARKING BRAKE. AN ONCOMING CAR HAD TO BRAKE, SO AS TO AVOID HITTING ME. I GOT THE TRUCK BACK IN TO THE DRIVEWAY AND RODE THE PARK BRAKE DOWN THE DRIVE. CALLED A WRECKER TO TOW TO NEAREST GARAGE. THE BRAKE LINES RUPTURED IN THE DIFFERENT PLACES, LOST ALL BRAKE FLUID.
NHTSA ODI #10617527
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
76,158 miles · Mar 28, 2012
Service Brakes, Hydraulic
A SECOND BRAKE LINE RUPTURED AS A RESULT OF RUST CORROSION CAUSING THE BRAKES TO FAIL AT 76,158 ORIGINAL MILES. I NARROWLY AVOIDED A REAR END COLLISION INTO ANOTHER VEHICLE CARRYING A FAMILY WITH CHILDREN. THE VEHICLE WAS TOWED TO A GM DEALER WHERE IT WAS DIAGNOSED. THE COST ESTIMATE FROM THE GM DEALER TO REPLACE ALL OF THE RUS…
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A SECOND BRAKE LINE RUPTURED AS A RESULT OF RUST CORROSION CAUSING THE BRAKES TO FAIL AT 76,158 ORIGINAL MILES. I NARROWLY AVOIDED A REAR END COLLISION INTO ANOTHER VEHICLE CARRYING A FAMILY WITH CHILDREN. THE VEHICLE WAS TOWED TO A GM DEALER WHERE IT WAS DIAGNOSED. THE COST ESTIMATE FROM THE GM DEALER TO REPLACE ALL OF THE RUSTED BRAKE PARTS IS $5,125.00 THIS IS THE SECOND INCIDENT OF BRAKE FAILURE AS A RESULT OF RUSTED OUT BRAKE LINES. THE FIRST INCIDENT OCCURRED AT 73,870 ORIGINAL MILES. A CALL WAS MADE TO GMC IN AN EFFORT TO SEEK ASSISTANCE WITH THE REPAIR AMOUNT AND THEY ADAMANTLY REFUSED ANY ASSISTANCE. *TR
NHTSA ODI #10453383
150,000 miles · Jan 23, 2012
Fuel System, GasolineService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, HE APPLIED THE BRAKES AND THE PEDAL DEPRESSED TO THE FLOOR. THE VEHICLE COASTED TO A STOP. THE CONTACT EXAMINED THE MASTER CYLINDER AND NOTICED THAT ALL THE BRAKE FLUID LEAKED FROM THE VEHICLE. THE CONTACT ALSO NOTICED THAT THE BRAKE LINES…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 20 MPH, HE APPLIED THE BRAKES AND THE PEDAL DEPRESSED TO THE FLOOR. THE VEHICLE COASTED TO A STOP. THE CONTACT EXAMINED THE MASTER CYLINDER AND NOTICED THAT ALL THE BRAKE FLUID LEAKED FROM THE VEHICLE. THE CONTACT ALSO NOTICED THAT THE BRAKE LINES WERE FRACTURED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC AND WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND OFFERED NO ASSISTANCE. IN ADDITION, THE CONTACT STATED THAT HE REPLACED THE FUEL LINES AND PUMPS IN THE PAST DUE TO CORROSION. THE FAILURE AND CURRENT MILEAGES WERE 150,000.
NHTSA ODI #10444879
73,870 miles · Dec 29, 2011
Service Brakes, Hydraulic
THE MASTER CYLINDER BRAKE LINE RUSTED THROUGH CAUSING THE BRAKES TO FAIL. THE TRUCK WAS TOWED BY AAA EMERGENCY SERVICE WHERE THE BRAKE FAILURE WAS DIAGNOSED. THE COST TO REPLACE THE FAILED BRAKE LINE WAS $270.79 THE REST OF THE UNDER-CARRIAGE OF THE TRUCK IS BADLY RUSTED AS WELL. *KB
NHTSA ODI #10441683
184,502 miles · Nov 27, 2011
Service Brakes, Hydraulic
STOPPED IN FRONT OF HOUSE AND WHEN ALMOST STOPPED THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD NO BRAKES EXCEPT FOR A VERY SLIGHT "DRAG". I STOPPED AND LOOKED UNDER THE TRUCK AND SAW FLUID COMING FROM UNDER THE FRONT OF VEHICLE. IT APPEARED TO BE BRAKE FLUID AND IT WAS TRACED TO A METAL BRAKE RUNNING ACROSS THE FRONT FRAME MEMBER…
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STOPPED IN FRONT OF HOUSE AND WHEN ALMOST STOPPED THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD NO BRAKES EXCEPT FOR A VERY SLIGHT "DRAG". I STOPPED AND LOOKED UNDER THE TRUCK AND SAW FLUID COMING FROM UNDER THE FRONT OF VEHICLE. IT APPEARED TO BE BRAKE FLUID AND IT WAS TRACED TO A METAL BRAKE RUNNING ACROSS THE FRONT FRAME MEMBER TO THE BRAKE ON THE FRONT PASSENGER WHEEL. THE LINE WAS EXTREMELY RUSTY AND LEAKING PROFUSELY. UPON FURTHER INSPECTION ALL METAL BRAKE LINES ARE SEVERELY RUSTED AND NEED REPLACED. I HAVE SEEN MANY VEHICLES BUT NONE WITH THIS AMOUNT OF RUST ON EVERY PART OF ALL LINES AND THE FRAME. THIS TRUCK IS 10 YRS OLD AND IS NOW UNSAFE TO DRIVE UNTIL ALL BRAKE LINES ARE REPLACED AT SUBSTANTIAL COST AND EFFORT. AS YOU WOULD EXPECT I AM NOT PLEASED BUT CONSIDER MYSELF VERY LUCKY. I COULD HAVE KILLED SOMEONE OR MYSELF. PLEASE WARN OTHERS THIS HAZARD EXISTS. *TR
NHTSA ODI #10437394
88,000 miles · Aug 22, 2011
Service Brakes, HydraulicStructure
I HAVE A 200 GMC SIERRA AND HAVE FOUND NOW THAT ALL THE BRAKE LINES HAVE RUSTED THROUGH, AND THE FRAME IS SO BADLY RUSTY IT IS NOT SAFE TO DRIVE. AS I REVIEW THE INTERNET THERE ARE HUNDREDS AND HUNDREDS OF SIMILAR PROBLEMS, MANY RESULTING IN CRASHES. YOU MUST MAKE GMC FACE UP TO THIS PROBLEM AND GET THESE DANGEROUS VEHICLES OFF …
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I HAVE A 200 GMC SIERRA AND HAVE FOUND NOW THAT ALL THE BRAKE LINES HAVE RUSTED THROUGH, AND THE FRAME IS SO BADLY RUSTY IT IS NOT SAFE TO DRIVE. AS I REVIEW THE INTERNET THERE ARE HUNDREDS AND HUNDREDS OF SIMILAR PROBLEMS, MANY RESULTING IN CRASHES. YOU MUST MAKE GMC FACE UP TO THIS PROBLEM AND GET THESE DANGEROUS VEHICLES OFF THE ROAD. *TR
NHTSA ODI #10421051
145,000 miles · Jul 21, 2011
Service Brakes, Hydraulic
WHILE BLEEDING THE REAR DISK BRAKE CALIPERS IN THE DRIVEWAY, THE STEEL HYDRAULIC TUBING FROM THE BRAKE MASTER CYLINDER TO THE REAR BRAKE CALIPERS BURST DUE TO EXCESSIVE RUST. THE RESULT WAS A QUICK LOSS OF HYDRAULIC BRAKE FLUID. HAD THIS HAPPENED ON THE HIGHWAY, ALL BRAKING WOULD HAVE BEEN LOST DUE TO THE FACT THAT THE HYDRAULIC…
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WHILE BLEEDING THE REAR DISK BRAKE CALIPERS IN THE DRIVEWAY, THE STEEL HYDRAULIC TUBING FROM THE BRAKE MASTER CYLINDER TO THE REAR BRAKE CALIPERS BURST DUE TO EXCESSIVE RUST. THE RESULT WAS A QUICK LOSS OF HYDRAULIC BRAKE FLUID. HAD THIS HAPPENED ON THE HIGHWAY, ALL BRAKING WOULD HAVE BEEN LOST DUE TO THE FACT THAT THE HYDRAULIC FLUID RESERVOIR IS NOT DIVIDED INTO FRONT/REAR COMPARTMENTS. AFTER THE LEAK, THE BRAKE PEDAL WENT RIGHT TO THE FLOOR. *KB
NHTSA ODI #10413930
145,000 miles · Jul 21, 2011
Service Brakes, Hydraulic
WHILE SLOWING DOWN AT MY NEIGHBORHOOD ELEMENTARY SCHOOL I APPLIED THE BRAKES AT THE STOP SIGN. THE BRAKE PEDAL BEGAN TO PULSE. I DROVE AROUND THE BLOCK TO MY HOUSE. UPON INVESTIGATION, A 12" SECTION OF THE INSIDE OF MY LEFT REAR BRAKE ROTOR BROKE OFF. WHEN THE ROTOR CONTINUED TO TURN, THE REMAINING SECTION OF THE BRAKE ROTOR CAU…
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WHILE SLOWING DOWN AT MY NEIGHBORHOOD ELEMENTARY SCHOOL I APPLIED THE BRAKES AT THE STOP SIGN. THE BRAKE PEDAL BEGAN TO PULSE. I DROVE AROUND THE BLOCK TO MY HOUSE. UPON INVESTIGATION, A 12" SECTION OF THE INSIDE OF MY LEFT REAR BRAKE ROTOR BROKE OFF. WHEN THE ROTOR CONTINUED TO TURN, THE REMAINING SECTION OF THE BRAKE ROTOR CAUGHT THE CALIPER PISTON AND SHEARED IT OFF. LUCKILY, I WAS ONLY DRIVING AT 18 MPH. IF I HAD BEEN ON THE HIGHWAY DRIVING 55-65 MPH, THE LOSS OF BRAKING WOULD HAVE BEEN CATASTROPHIC. THE PIECE THAT BROKE OFF WAS COVERED WITH RUST ON THE INSIDE - THE SIDE MANUFACTURED WITH COOLING OPENINGS WHICH ARE LOCATED BETWEEN THE INSIDE AND OUTSIDE OF THE BRAKE ROTOR. *KB
NHTSA ODI #10413922
68,780 miles · Jul 19, 2011
Service Brakes, HydraulicCrash
TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE APPROACHING A TRAFFIC STOP SIGNAL AT APPROXIMATELY 45 MPH, THE BRAKE PEDAL WAS ENGAGED BUT THE VEHICLE FAILED TO SLOW DOWN AND ACCELERATED INTO A DITCH. THE VEHICLE WAS TOWED AN INDEPENDENT MECHANIC FOR DIAGNOSIS WHERE THEY STATE THAT THE BRAKE LINES WERE…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE APPROACHING A TRAFFIC STOP SIGNAL AT APPROXIMATELY 45 MPH, THE BRAKE PEDAL WAS ENGAGED BUT THE VEHICLE FAILED TO SLOW DOWN AND ACCELERATED INTO A DITCH. THE VEHICLE WAS TOWED AN INDEPENDENT MECHANIC FOR DIAGNOSIS WHERE THEY STATE THAT THE BRAKE LINES WERE FRACTURED AND THE ENTIRE FRAME WAS CORRODED. THE TECHNICIAN ALSO STATED THAT THE BRAKE LINES FRACTURED DUE TO RUST CORROSION AND RECOMMENDED HAVING THE VEHICLE REPAIRED AT A COLLISION CENTER. TWO MONTHS LATER, THE VEHICLE WAS TOWED TO A COLLISION CENTER WHERE THE CONTACT WAS INFORMED THE DAMAGES WERE BEYOND REPAIR. THE FAILURE MILEAGE WAS 68,780. UPDATED 09/27/11 *BF UPDATED 2/9/2012 *CN
NHTSA ODI #10413560
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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