NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
181 reports53,000 miles · May 7, 2009
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT THERE WAS A RECALL REGARDING THE BRAKES ON HIS VEHICLE. AFTER THE RECALL REPAIR WAS PERFORMED, THE FAILURE RECURRED. WHILE DRIVING 8 MPH, THE VEHICLE CONTINUED TO MOVE WHEN THE BRAKE PEDAL WAS DEPRESSED. PRIOR TO THE REPAIR, THE CONTACT FILED A COMPLAINT AND…
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TL*THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT THERE WAS A RECALL REGARDING THE BRAKES ON HIS VEHICLE. AFTER THE RECALL REPAIR WAS PERFORMED, THE FAILURE RECURRED. WHILE DRIVING 8 MPH, THE VEHICLE CONTINUED TO MOVE WHEN THE BRAKE PEDAL WAS DEPRESSED. PRIOR TO THE REPAIR, THE CONTACT FILED A COMPLAINT AND HAD THE ISSUE ADDRESSED AND REPAIRED FOR FREE. THE FAILURE MILEAGE WAS 53,000 AND CURRENT MILEAGE WAS 130,563.
NHTSA ODI #10267985
110,210 miles · Apr 8, 2009
Parking Brake
THE PARKING BRAKE ON MY 2000 GMC SIERRA WILL NOT HOLD. I HAVE ADJUSTED BOTH THE PARK BRAKE SHOES AND CABLE, BUT IT WILL STILL NOT HOLD THE TRUCK. THIS IS THE SAME ISSUE THAT LED TO A RECALL ON GMC AND CHEVROLET PICK-UPS WITH MANUAL TRANSMISSIONS, BUT THE TRUCKS EQUIPPED WITH AUTOMATIC TRANSMISSIONS WERE NOT INCLUDED. HOWEVER,…
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THE PARKING BRAKE ON MY 2000 GMC SIERRA WILL NOT HOLD. I HAVE ADJUSTED BOTH THE PARK BRAKE SHOES AND CABLE, BUT IT WILL STILL NOT HOLD THE TRUCK. THIS IS THE SAME ISSUE THAT LED TO A RECALL ON GMC AND CHEVROLET PICK-UPS WITH MANUAL TRANSMISSIONS, BUT THE TRUCKS EQUIPPED WITH AUTOMATIC TRANSMISSIONS WERE NOT INCLUDED. HOWEVER, THE PARK BRAKE MUST BE IN WORKING ORDER TO PASS THE NC SAFETY INSPECTION. *TR
NHTSA ODI #10264764
135,556 miles · Mar 6, 2009
Structure
TL*THE CONTACT OWNS A 2000 GMC K1500. THE CONTACT WAS PERFORMING AN OIL CHANGE WHILE THE VEHICLE WAS MOUNTED ON THE LIFT. SUDDENLY, HE HEARD A LOUD NOISE AND THE REAR OF THE VEHICLE PLUNGED TO THE GROUND WITH THE REMAINDER OF THE CAB STILL MOUNTED ON THE LIFT. THE VEHICLE'S FRAME FAILED WITHOUT WARNING. THERE WERE NO INJURIE…
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TL*THE CONTACT OWNS A 2000 GMC K1500. THE CONTACT WAS PERFORMING AN OIL CHANGE WHILE THE VEHICLE WAS MOUNTED ON THE LIFT. SUDDENLY, HE HEARD A LOUD NOISE AND THE REAR OF THE VEHICLE PLUNGED TO THE GROUND WITH THE REMAINDER OF THE CAB STILL MOUNTED ON THE LIFT. THE VEHICLE'S FRAME FAILED WITHOUT WARNING. THERE WERE NO INJURIES. THE MANUFACTURER WAS NOTIFIED AND STATED THAT THEY WERE NOT FINANCIALLY RESPONSIBLE FOR THE REPAIR. THE VEHICLE HAS NOT BEEN REPAIRED AND IS CURRENTLY INOPERABLE. THE FAILURE AND CURRENT MILEAGES WERE 135,556. UPDATED 03-27-09 *BF UPDATED 03/31/09. *JB
NHTSA ODI #10260902
89,063 miles · Jan 11, 2009
Service Brakes, Hydraulic
PURCHASED 2000 GMC SIERRA 1500 NEW. HAVE DURING TIME OF OWNERSHIP HAD BOTH FRONT AND REAR DISC BRAKES/ROTORS REPAIRED/REPLACED TWICE. ONCE WITH 20,151 MILES UNDER WARRANTY. THE LAST SET OF FRONT ROTORS AND PADS WERE REPLACED WITH 74,299 MILES DURING THE RECALL 05068 FOR ABS SPEED SENSOR CORROSION. I HAD TO PAY FOR THIS SET O…
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PURCHASED 2000 GMC SIERRA 1500 NEW. HAVE DURING TIME OF OWNERSHIP HAD BOTH FRONT AND REAR DISC BRAKES/ROTORS REPAIRED/REPLACED TWICE. ONCE WITH 20,151 MILES UNDER WARRANTY. THE LAST SET OF FRONT ROTORS AND PADS WERE REPLACED WITH 74,299 MILES DURING THE RECALL 05068 FOR ABS SPEED SENSOR CORROSION. I HAD TO PAY FOR THIS SET OF ROTORS AND PADS AT A COST OF $406.03. SINCE TIME OF "SAFETY RECALL" TRUCK HAS INTERMITTENTLY NOT STOPPED PROPERLY AT LOW SPEED. WHILE DRIVING I ATTEMPTED TO STOP HEARD A SLIGHT POP AND THE BRAKE PEDDLE WENT TO THE FLOOR WITH LITTLE RESISTANCE. HAD TRUCK TAKEN TO DEALER SHIP WHERE LAST BRAKE REPAIR AND SAFETY RECALL WAS PERFORMED, THEY DISCOVERED THAT MY MAIN BRAKE LINE HAD RUSTED THROUGH AND HAD FAILED. AT THAT TIME THEY ALSO INFORMED ME THAT ALL THE BRAKE LINES WERE RUSTY AND SHOULD BE REPLACED. I HAD AT THE TIME OF DROPPING THE VEHICLE OFF INFORMED THEM OF THE PROBLEM WITH LOW SPEED BRAKING AND THE FEELING THAT THE ABS WAS ACTIVATING. UPON REPAIR OF THE MAIN BRAKE LINE AT $244.32 (I DECLINED TO HAVE ALL BRAKE LINES REPLACED AT MY EXPENSE) THEY TEST DROVE THE VEHICLE AND INDICATED THAT THEY WERE UNABLE TO EXPERIENCE THE LOW SPEED BRAKE FAILURE. I DO NOT BELIEVE THAT A VEHICLE WITH LESS THAN 90,000 MILES SHOULD HAVE BRAKE LINES RUST THROUGH, THAT TWO SETS OF ROTORS RUST TO THE POINT OF FAILURE. THIS DEGREE OF RUST TO THE BRAKING SYSTEM APPEARS EXCESSIVE AND UNWARRANTED. IN LOOKING AT INTERNET APPEARS TO BE SERIOUS PROBLEM WITH 2000 GMC AND CHEVY PICKUPS. WIFE WILL NOT RIDE IN THE TRUCK AS SHE FEELS IT IS UNSAFE SINCE CAN'T ALWAYS STOP TRUCK! *TR
NHTSA ODI #10254652
Mileage unknown · Dec 16, 2008
Service Brakes, Hydraulic
BRAKES FAIL TO ENGAGE WHEN BRAKING. THANK GOD I DO NOT FOLLOW CLOSELY TO VEHICLES AHEAD OF ME. THIS HAS BEEN HAPPENING FOR SEVERAL YEARS. BROUGHT TO DEALERSHIP WHEN THIS FIRST HAPPENED AND WAS TOLD THERE WAS NOTHING WRONG WITH MY BRAKES AND THERE IS NO RECALL ON THE BRAKE SYSTEM. I WILL REPORT THE LAST DATE THIS HAPPENED. *T…
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BRAKES FAIL TO ENGAGE WHEN BRAKING. THANK GOD I DO NOT FOLLOW CLOSELY TO VEHICLES AHEAD OF ME. THIS HAS BEEN HAPPENING FOR SEVERAL YEARS. BROUGHT TO DEALERSHIP WHEN THIS FIRST HAPPENED AND WAS TOLD THERE WAS NOTHING WRONG WITH MY BRAKES AND THERE IS NO RECALL ON THE BRAKE SYSTEM. I WILL REPORT THE LAST DATE THIS HAPPENED. *TR
NHTSA ODI #10251923
Mileage unknown · Dec 14, 2008
Fuel System, Gasoline
THE FUEL GAUGE IS BOUNCING ERRATICALLY EVERY TIME THE VEHICLE IS IN PARK OR NEUTRAL BUT IN NO OTHER GEAR. IT HAS BEEN FINE FOR YEARS BUT SUDDENLY STARTED ACTING UP. THE TRUCK RECEIVES REGULAR MAINTENANCE, BUT THE START OF THE PROBLEM DID NOT COINCIDE WITH ANY MAINTENANCE OR ANY EVENT. IT JUST STARTED HAPPENING. *TR
NHTSA ODI #10251719
170,000 miles · Dec 9, 2008
Fuel System, GasolineParking BrakePower Train
FUEL GAUGE ACTING VERY ERRATIC AND VEHICLE WILL NOT START HAVE NOTICED ONLINE THAT MANY GMC SIERRA OWNERS OF SIMILAR YEARS HAVE EXPERIENCED SAME PROBLEMS VERY EXPENSIVE TO REPAIR. *TR
NHTSA ODI #10251140
Mileage unknown · Dec 8, 2008
Service Brakes, HydraulicCrash
EVERY SO OFTEN THE FOR ABOUT A MONTH THE ANTI-LOCK BRAKE SYSTEM WOULD KICK BACK SLIGHTLY WHEN THE VEHICLE WAS COMING TO A STOP. ONE SUNDAY MORNING WHILE COMING TO STOP THE ANTI- LOCK SYSTEM KICKED BACK VERY HARD AND I RAN INTO THE VEHICLE IN FRONT OF ME. NOW THE SYSTEM IS KICKING BACK AT ALMOST EVERY STOP! *TR
NHTSA ODI #10251038
35,500 miles · Nov 27, 2008
Parking Brake
PARKING BRAKE WORE OUT BY ITSELF AND FAILED TO WORK. WILL NOT FUNCTION AS DESIGNED. HAD $400 REPAIRS MADE TO BRAKE. *TR
NHTSA ODI #10249997
16,500 miles · Nov 27, 2008
Service Brakes, HydraulicCrash
ABS BRAKES FAILED TO WORK AT 7-8 MPH. TRUCK HIT VEHICLE IN FRONT OF IT. DEALER SAID ALL IS WELL. *TR
NHTSA ODI #10249996
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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