NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
587 reportsMileage unknown · Sep 28, 2018
Seats
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 70 MPH, THE DRIVER'S SEAT SLID ON THE TRACK AND CAUSED THE CONTACT TO BUMP INTO THE STEERING WHEEL AND DASHBOARD AREA WITH FORCE. AN UNKNOWN DEALER DIAGNOSED THAT THE SEAT RAIL NEEDED TO BE REPLACED DUE TO THE PLASTIC SEAT HOLDERS FRACTURING UNDER …
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 70 MPH, THE DRIVER'S SEAT SLID ON THE TRACK AND CAUSED THE CONTACT TO BUMP INTO THE STEERING WHEEL AND DASHBOARD AREA WITH FORCE. AN UNKNOWN DEALER DIAGNOSED THAT THE SEAT RAIL NEEDED TO BE REPLACED DUE TO THE PLASTIC SEAT HOLDERS FRACTURING UNDER THE DRIVER'S SEAT. THE MANUFACTURER WAS NOT NOTIFIED. THE VIN AND FAILURE MILEAGE WERE NOT AVAILABLE.
NHTSA ODI #11132141
230,000 miles · Sep 28, 2018
Power TrainSteering
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE VEHICLE WAS PARKED, THE CONTACT ATTEMPTED TO ACCELERATE AND LOST THE ABILITY TO STEER THE VEHICLE. THE BOLTS THAT HELD THE GEAR BOX TO THE FRAME HAD BEEN SHEARED OFF. THE DEALER (COOPER CHEVROLET BUICK, 1300 S QUINTARD AVE, ANNISTON, AL 36201, (256) 405-4155) STATED…
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE VEHICLE WAS PARKED, THE CONTACT ATTEMPTED TO ACCELERATE AND LOST THE ABILITY TO STEER THE VEHICLE. THE BOLTS THAT HELD THE GEAR BOX TO THE FRAME HAD BEEN SHEARED OFF. THE DEALER (COOPER CHEVROLET BUICK, 1300 S QUINTARD AVE, ANNISTON, AL 36201, (256) 405-4155) STATED THAT THE BOLTS LOOKED LIKE THEY WERE TORQUED TOO TIGHTLY. THE DEALER AND MANUFACTURER STATED THAT THE VEHICLE WAS NOT INCLUDED IN A RECALL. THE FAILURE MILEAGE WAS 230,000. *TT UPDATED 12/07/18*JB
NHTSA ODI #11132115
100,000 miles · Aug 24, 2018
Power TrainService Brakes, Hydraulic
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 15 MPH, THE TRANSMISSION MALFUNCTIONED AND THE VEHICLE WOULD NOT PROPERLY ACCELERATE. THE VEHICLE WAS TAKEN TO THE LOCAL INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE TRANSMISSION COMPONENTS IN FIRST GEAR WERE SHATTERED AND THE TRANSMISSION NEEDED TO…
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 15 MPH, THE TRANSMISSION MALFUNCTIONED AND THE VEHICLE WOULD NOT PROPERLY ACCELERATE. THE VEHICLE WAS TAKEN TO THE LOCAL INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE TRANSMISSION COMPONENTS IN FIRST GEAR WERE SHATTERED AND THE TRANSMISSION NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. ALSO, BRAKE FLUID WAS LEAKING FROM THE VEHICLE. UPON INSPECTION, IT WAS DISCOVERED THAT THE BRAKE LINES WERE RUSTED AND CORRODED. THE BRAKE LINES WERE REPLACED AND THE FAILURE WAS REMEDIED. THE DEALER WAS NOT CONTACTED. THE MANUFACTURER WAS NOTIFIED AND NO SOLUTION WAS OFFERED. THE FAILURE MILEAGE WAS 100,000.
NHTSA ODI #11122077
110,000 miles · Aug 2, 2018
Electrical SystemEngineUnknown Or Other
PASSLOCK SYSTEM ENGAGES WITHOUT CAUSE. WHEN STARTING MY TRUCK, IT ACTS LIKE IT WILL AND THEN SHUTS DOWN AFTER A SECOND, AND THEN THE SECURITY LIGHT COMES ON. THIS IS COMMON WITH PAST LOCK SYSTEM ERRORS. THIS HAPPENS ABOUT 1 OUT OF 4 STARTS. TO GET THE CAR STARTED, I HAVE TO GO THROUGH A RESET PROCESS THAT TAKES OVER 30 MIN, WHIC…
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PASSLOCK SYSTEM ENGAGES WITHOUT CAUSE. WHEN STARTING MY TRUCK, IT ACTS LIKE IT WILL AND THEN SHUTS DOWN AFTER A SECOND, AND THEN THE SECURITY LIGHT COMES ON. THIS IS COMMON WITH PAST LOCK SYSTEM ERRORS. THIS HAPPENS ABOUT 1 OUT OF 4 STARTS. TO GET THE CAR STARTED, I HAVE TO GO THROUGH A RESET PROCESS THAT TAKES OVER 30 MIN, WHICH CAUSES BATTERY DRAIN. THIS HAS LEFT MYSELF AND FAMILY MEMBERS STRANDED IN UNSAFE SITUATIONS SEVERAL TIMES. MOST RECENTLY I WAS STUCK ON THE SIDE OF THE HIGHWAY, AFTER STOPPING TO CHANGE A FLAT AT 11PM. AFTER NOT STARTING WITH THESE SAME SYMTOMS, WHILE TRYING TO DO THE 30MIN. RELEARN PROCESS, THE BATTERY DID NOT HAVE ENOUGH TO START THE TRUCK. SO I WAS THEN STUCK THERE FOR 3 MORE HOURS WAITING ON A TOW TRUCK FOR A JUMP. I WAS STRANDED FOR OVER 3 1/2 HOURS. THIS ISSUE HAS BEEN HAPPENING FOR THE LAST 2 YEARS, AND HAVE SPENT ABOUT 4K DOLLARS TO TRY AND FIX IT.
NHTSA ODI #11115312
Mileage unknown · Jun 22, 2018
Electrical SystemEngineLatches/locks/linkagesFire
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500 (GMT800). WHILE THE VEHICLE WAS STATIONARY, AN ABNORMAL ODOR WAS DETECTED INSIDE THE CABIN. THE CONTACT ATTEMPTED TO OPEN THE HOOD, BUT THE LATCH FAILED TO RELEASE THE HOOD. ALSO, FLAMES WERE SEEN UNDERNEATH THE HOOD. THE CONTACT BELIEVED THE FIRE ORIGINATED FROM THE FUSE BOX,…
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500 (GMT800). WHILE THE VEHICLE WAS STATIONARY, AN ABNORMAL ODOR WAS DETECTED INSIDE THE CABIN. THE CONTACT ATTEMPTED TO OPEN THE HOOD, BUT THE LATCH FAILED TO RELEASE THE HOOD. ALSO, FLAMES WERE SEEN UNDERNEATH THE HOOD. THE CONTACT BELIEVED THE FIRE ORIGINATED FROM THE FUSE BOX, WHICH BURNED THE ENGINE WIRE HARNESS. THE FIRE WAS EXTINGUISHED BY THE FIRE DEPARTMENT. A POLICE REPORT WAS FILED. THERE WERE NO INJURIES SUSTAINED. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE. THE VEHICLE WAS NOT DESTROYED. THE VEHICLE WAS NOT TAKEN TO A DEALER OR INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING OR REPAIR. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURES. THE FAILURE MILEAGE WAS UNKNOWN.
NHTSA ODI #11103443
101,000 miles · Jun 7, 2018
Service Brakes
BRAKE LINES RUSTED AND BROKE. THIS CAUSED A LOSS OF BRAKING ABILITY AND A NEAR ACCIDENT. BRAKE LINE MATERIALS USED WERE INFERIOR AND THIS PRESENTS A SAFETY RISK FOR ALL OWNERS. GM SHOULD REPLACE ALL REGISTERED VEHICLES WITH STAINLESS STEEL LINES.
NHTSA ODI #11100346
Mileage unknown · Apr 12, 2018
Structure
THE FRAME BROKE RIGHT OVER THE REAR END. . I SEEN THE BED OF THE TRUCK WAS NOT LINING UP WITH THE CAB ONE DAY.
NHTSA ODI #11084830
Mileage unknown · Mar 6, 2018
Service Brakes
ANTI-LOCK BRAKE FAILURE EMPLOYS WHEN NOT NEEDED AND AT LOW SPEEDS IN MOTION .VERY DANGEROUS !!! !!!
NHTSA ODI #11076573
118,362 miles · Dec 26, 2017
Structure
THE FULL SIZE SPARE TIRE THAT IS MOUNTED UNDER THE REAR OF VEHICLE FELL OFF INTO TRAFFIC WHILE MAKING A SLOW TURN, ON A FLAT, SMOOTH CONCRETE CITY STREET AT 4 MPH.THE TINY CABLE THAT HOLDS THE WHEEL RUSTED COMPLETELY THROUGH. THIS IS A DEADLY HAZARD! SOMEONE WILL GET KILLED BY THIS FLAW EVENTUALLY
NHTSA ODI #11056632
Mileage unknown · Nov 4, 2017
Service Brakes
COMPLETE BRAKE FAILURE. STEEL LINES RUSTED AND BURST. ON SIDE STREET, SLOWING DOWN TO STOP BEFORE ENTERING THE HIGHWAY ON DOWN HILL LOCATION. STEPPED ON BRAKES, LINE FAILED, JUST MISSED REAR ENDING VEHICLE IN FRONT OF ME, WAS ABLE TO SHIFT IN REVERSE AND GET STOPPED BEFORE ENTERING HIGHWAY.
NHTSA ODI #11043295
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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