NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
140 reports101,000 miles · Nov 8, 2010
Service Brakes, Hydraulic
DRIVING AT APPROXIMATELY 35 MPH, APPLIED BRAKES WHEN APPROACHING A RED LIGHT. BRAKE PEDAL WENT DOWN TO THE FLOOR, TRUCK WENT INTO THE INTERSECTION AND FINALLY CAME TO A STOP. THERE WERE NO INDICATION OF PROBLEM BEFORE THIS OCCURRED. TRUCK TAKEN TO A REPAIR SHOP. ALL BRAKE LINES WERE RUSTED AND WERE REPLACED. I REQUESTED THAT…
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DRIVING AT APPROXIMATELY 35 MPH, APPLIED BRAKES WHEN APPROACHING A RED LIGHT. BRAKE PEDAL WENT DOWN TO THE FLOOR, TRUCK WENT INTO THE INTERSECTION AND FINALLY CAME TO A STOP. THERE WERE NO INDICATION OF PROBLEM BEFORE THIS OCCURRED. TRUCK TAKEN TO A REPAIR SHOP. ALL BRAKE LINES WERE RUSTED AND WERE REPLACED. I REQUESTED THAT THE SERVICE STATION SAVE THE RUSTED PARTS WHICH ARE NOW IN MY GARAGE. *TR
NHTSA ODI #10364380
70,000 miles · Oct 27, 2010
Unknown Or Other
THE ABS WARNING LIGHT COMES ON INTERMITTENTLY. TROUBLESHOOTING AND RESEARCH POINTS TO THE LIKELY FAILURE OF THE ABS SENSORS IN THE HUB OF THE LEFT AND RIGHT FRONT WHEELS. THE ABS WARNING LIGHT OCCURS VERY FREQUENTLY. POTENTIAL CONSEQUENCE IS SUDDEN ABS FAILURE, HENCE SERIOUS INJURY TO OCCUPANTS. *TR
NHTSA ODI #10362609
106,000 miles · Sep 28, 2010
Service Brakes, Hydraulic
ONE OF THE BRAKE LINES FAILED WHILE I WAS STOPPED IN TRAFFIC NEARLY CAUSING A COLLISION. I WAS STOPPED WITH MY FOOT ON THE BRAKE WHEN THE PEDAL SUDDENLY WENT TO THE FLOOR AND THE TRUCK MOVED FORWARD SEVERAL FEET. I PUSHED THE PEDAL AGAIN AND THE TRUCK STOPPED BUT THE PEDAL TRAVELED NEARLY ALL THE WAY TO THE FLOOR. I LOOKED AND S…
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ONE OF THE BRAKE LINES FAILED WHILE I WAS STOPPED IN TRAFFIC NEARLY CAUSING A COLLISION. I WAS STOPPED WITH MY FOOT ON THE BRAKE WHEN THE PEDAL SUDDENLY WENT TO THE FLOOR AND THE TRUCK MOVED FORWARD SEVERAL FEET. I PUSHED THE PEDAL AGAIN AND THE TRUCK STOPPED BUT THE PEDAL TRAVELED NEARLY ALL THE WAY TO THE FLOOR. I LOOKED AND SAW BRAKE FLUID LEAKING FROM A HOLE IN ONE OF THE BRAKE LINES. THE LINES ARE ALL VERY RUSTY/CORRODED AND THE BLOWN LINE WAS OUTSIDE THE FRAME BELOW THE DRIVERS DOOR. *TR
NHTSA ODI #10358105
99,000 miles · Sep 15, 2010
Service Brakes, Hydraulic
2001 GMC SIERRA 1500 4X4 MAIN BRAKE LINE RUPTURE FROM CORROSION WHILE DRIVING IN TRAFFIC. *TR
NHTSA ODI #10355755
144,555 miles · Sep 13, 2010
Service Brakes, Hydraulic
I OWN A 2001 GMC SIERRA 1500. ON SEPTEMBER 7 2010 I LEFT MY HOUSE TO GO TO WORK, I STOPPED AT THE MAIL BOX AT THE END OF DRIVEWAY WITH MY FOOT ON THE BRAKE. AFTER ABOUT 15 SECONDS THE PEDAL WENT TO THE FLOOR AND THE TRUCK STARTED TO ROLL AWAY. I BACKED UP INTO MY DRIVEWAY AND NOTICED BRAKE FLUID POURING OUT FROM UNDER THE TRUCK.…
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I OWN A 2001 GMC SIERRA 1500. ON SEPTEMBER 7 2010 I LEFT MY HOUSE TO GO TO WORK, I STOPPED AT THE MAIL BOX AT THE END OF DRIVEWAY WITH MY FOOT ON THE BRAKE. AFTER ABOUT 15 SECONDS THE PEDAL WENT TO THE FLOOR AND THE TRUCK STARTED TO ROLL AWAY. I BACKED UP INTO MY DRIVEWAY AND NOTICED BRAKE FLUID POURING OUT FROM UNDER THE TRUCK. WHEN I LOOKED UNDER THE TRUCK I NOTICED THAT ALL THE BRAKE LINES WERE EXTREMELY CORRODED AND ONE WAS LEAKING. I THANK GOD I WAS NOT DRIVING DOWN THE INTERSTATE WHEN IT HAPPENED. SCARY UNSAFE!!! *TR
NHTSA ODI #10355233
29,627 miles · Sep 5, 2010
Service Brakes, Hydraulic
ON 8/4/10, WHILE MOVING IN REVERSE IN MY DRIVEWAY, MY 2001 GMC SIERRA'S BRAKE LINE RUPTURED CAUSING COMPLETE BRAKE FAILURE DUE TO CORROSION ON THE STEEL BRAKE LINE. THE VEHICLE IS 10 YEARS OLD AND ONLY HAS 29,000 MILES ON IT. IT WAS RARELY DRIVEN IN THE WINTER WHEN THERE WAS SNOW, ICE OR SALT PRESENT. AS OF 9/5/10 THE TRUCK R…
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ON 8/4/10, WHILE MOVING IN REVERSE IN MY DRIVEWAY, MY 2001 GMC SIERRA'S BRAKE LINE RUPTURED CAUSING COMPLETE BRAKE FAILURE DUE TO CORROSION ON THE STEEL BRAKE LINE. THE VEHICLE IS 10 YEARS OLD AND ONLY HAS 29,000 MILES ON IT. IT WAS RARELY DRIVEN IN THE WINTER WHEN THERE WAS SNOW, ICE OR SALT PRESENT. AS OF 9/5/10 THE TRUCK REMAINS PARKED AND THE LINES HAVE NOT BEEN REPLACED. WHEN THE FAILURE HAPPENED, I CONDUCTED RESEARCH TO FIND THIS FAILURE TO BE A PENDING INVESTIGATION FOR A POSSIBLE RECALL. NHTSA ACTION NUMBER : PE10010. I ONLY WANT GMC TO TAKE RESPONSIBILITY FOR THE COST OF THE REPAIR OR REIMBURSEMENT FOR THE COST OF THE REPAIR THAT IS CAUSED BY THIS DEFECT. BUT I'M PRETTY SURE A RECALL ON 6.3 MILLION VEHICLES WILL NOT BE ISSUED WITH GM'S IPO SET TO BE RELEASED. SO, I, THE GM CONSUMER, WILL HAVE TO WAIT. *TR
NHTSA ODI #10353947
96,000 miles · Aug 31, 2010
Service Brakes, Hydraulic
BRAKE LINES UNDER DRIVER'S SIDE DOOR BURST, SPILLING FLUID IN DRIVEWAY WHILE PARKING TRUCK. UPON INSPECTION, ALL BRAKE LINES HAVE RUSTED/ROTTED. TRUCK IS SITTING IN DRIVEWAY, UNDRIVEABLE. THANK GOD IT HAPPENED IN DRIVEWAY, NOT ON HILLS WE LIVE ON. USED E-BRAKE TO STOP. *TR
NHTSA ODI #10352932
116,000 miles · Aug 12, 2010
Wheels
I AM WRITING TO COMPLAIN ABOUT A 2001 GMC SIERRA. IT HAS A SAFETY RECALL FOR THE WHEEL SPEED SENSOR WHICH CAN ALSO DAMAGE THE HUB ASSEMBLY, BUT THE DEALERSHIP STILL WANTS TO CHARGE A WHOPPING $550 REPLACEMENT FEE. THEY SAY THEY CAN NOT REPLACE THE WHEEL SPEED SENSOR WITHOUT REPLACING THE HUB ASSEMBLY EVEN THOUGH IT HAS BEEN RECA…
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I AM WRITING TO COMPLAIN ABOUT A 2001 GMC SIERRA. IT HAS A SAFETY RECALL FOR THE WHEEL SPEED SENSOR WHICH CAN ALSO DAMAGE THE HUB ASSEMBLY, BUT THE DEALERSHIP STILL WANTS TO CHARGE A WHOPPING $550 REPLACEMENT FEE. THEY SAY THEY CAN NOT REPLACE THE WHEEL SPEED SENSOR WITHOUT REPLACING THE HUB ASSEMBLY EVEN THOUGH IT HAS BEEN RECALLED. THE BAD SPEED SENSOR IS CAUSING THE ABS TO MALFUNCTION AT LOW SPEEDS AND IT IS ALSO SMELLING LIKE ELECTRICAL FIRE, THE PROBLEM HAPPENS EVERY TIME WE DRIVE HE TRUCK AND I AM WORRIED THAT IT WILL SOON CATCH FIRE. WE WERE TOLD ONE DAY THAT THE PROBLEM WAS THE WHEEL SPEED SENSOR, AND THE VERY NEXT DAY, AFTER INFORMING THE DEALER THAT IT WAS UNDER A SAFETY RECALL, THEY TOLD US WE HAD TO REPLACE THE ENTIRE HUB ASSEMBLY. I HAVE NO DOUBT THAT THE ENTIRE HUB BEARING IS BAD, BUT I BELIEVE IT PROBABLY WENT BAD AS A RESULT OF THE MALFUNCTIONING WHEEL SENSOR. NEEDLESS TO SAY, I AM DISAPPOINTED IN MY DEALER AND GMC. *TR
NHTSA ODI #10349046
134,300 miles · Aug 10, 2010
Service Brakes, Hydraulic
SIXTY MILES INTO RETURN TRIP HOME WHILE BRAKING FOR STOP LIGHT FROM ABOUT 55-60 MPH, BRAKE PEDAL WENT STRAIGHT TO THE FLOOR AND TRUCK WOULD NOT STOP. BRAKES WORKED FINE EARLIER AND FAILED WITHOUT WARNING. LUCKILY I APPLIED THE BRAKES EARLY MISSING A VEHICLE THAT WAS ALREADY STOPPED FOR THE LIGHT BY LESS THAN ONE FOOT. BRAKE F…
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SIXTY MILES INTO RETURN TRIP HOME WHILE BRAKING FOR STOP LIGHT FROM ABOUT 55-60 MPH, BRAKE PEDAL WENT STRAIGHT TO THE FLOOR AND TRUCK WOULD NOT STOP. BRAKES WORKED FINE EARLIER AND FAILED WITHOUT WARNING. LUCKILY I APPLIED THE BRAKES EARLY MISSING A VEHICLE THAT WAS ALREADY STOPPED FOR THE LIGHT BY LESS THAN ONE FOOT. BRAKE FLUID IS LEAKING FROM SEVERELY CORRODED BRAKE LINES UNDERNEATH THE DRIVER'S SIDE DOOR. ALL BRAKE LINES ARE BADLY CORRODED AND ALL NEED REPLACING. ALL OF THE TRUCK'S METAL BRAKE LINES ARE RECOMMENDED TO BE REPLACED. *TR
NHTSA ODI #10348500
77,499 miles · Jul 15, 2010
Service Brakes, Hydraulic
SAFETY ABOUT GMC SIERRA TRUCK ABS BRAKING SYSTEM. THERE IS A RECALL ON THIS TRUCK FOR ABS ACTIVATION WHEN STOPPING AND COULD CAUSE A CRASH. I EXPERIENCED THIS AND THEY DID REPLACE OR CLEAN THE WHEEL SENSOR AND TEST FOR PROPER OPERATION. NOW I HAVE THE SAME PROBLEM BUT THEY WILL NOT CORRECT IT. THIS IS NOT ACCEPTABLE TO ME FO…
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SAFETY ABOUT GMC SIERRA TRUCK ABS BRAKING SYSTEM. THERE IS A RECALL ON THIS TRUCK FOR ABS ACTIVATION WHEN STOPPING AND COULD CAUSE A CRASH. I EXPERIENCED THIS AND THEY DID REPLACE OR CLEAN THE WHEEL SENSOR AND TEST FOR PROPER OPERATION. NOW I HAVE THE SAME PROBLEM BUT THEY WILL NOT CORRECT IT. THIS IS NOT ACCEPTABLE TO ME FOR I WILL BE TOWING A TRAILER AND DEPEND ON MY BRAKES TO STOP. THEY WANT ME TO TAKE IT TO THE DEALER AT MY EXPENSE. I TOLD THEM THAT I DISCONNECTED THE SENSOR AND THE BRAKES WORK FINE. I BELIEVE THAT THEY CORRECT THIS AND ALSO I DID HAVE A BRAKE LINE FAILURE WHERE I HAD TO PAY THEM $700.00 FOR THE REPLACEMENT OF MY BRAKE LINES. I AM FURIOUS ABOUT THE BRAKING SYSTEM AND CHEAP BUILDING OF OUR CARS AND TRUCKS. DO INVESTIGATE THIS AND REPLY. *TR
NHTSA ODI #10343479
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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