NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
587 reportsMileage unknown · Mar 16, 2010
Fuel System, GasolineVehicle Speed Control
1999 CHEV. SILVERADO. THROTTLE HANGS CAUSING VEHICLE TO ACCELERATE EITHER FORWARD OR REVERSE RAPIDLY. NORMALLY STICKS FROM FULL STOPPED POSITION POSSIBLY CAUSING CRASHES, PARTICULARLY IN REVERSE FROM A PARKING POSITION. PROBLEM WAS REPAIRED UNDER WARRANTY, WARRANTY HAS EXPIRED AND PROBLEM HAS RETURNED. COULD CAUSE SERIOUS PERSON…
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1999 CHEV. SILVERADO. THROTTLE HANGS CAUSING VEHICLE TO ACCELERATE EITHER FORWARD OR REVERSE RAPIDLY. NORMALLY STICKS FROM FULL STOPPED POSITION POSSIBLY CAUSING CRASHES, PARTICULARLY IN REVERSE FROM A PARKING POSITION. PROBLEM WAS REPAIRED UNDER WARRANTY, WARRANTY HAS EXPIRED AND PROBLEM HAS RETURNED. COULD CAUSE SERIOUS PERSONAL AND VEHICLE DAMAGE. *TR
NHTSA ODI #10320285
89,000 miles · Mar 6, 2010
Service Brakes, Hydraulic
BRAKES DO NOT WORK VERY GOOD AT SPEEDS LESS THAN 8 MPH. *TR
NHTSA ODI #10317332
88,000 miles · Mar 4, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 45 MPH. THE ANTI-LOCK BRAKE SYSTEM AND PARKING BRAKE WARNING LIGHT INDICATORS ILLUMINATED ON THE INSTRUMENT PANEL. THE WARNING INDICATORS REMAINED ILLUMINATED UNTIL THE ENGINE WAS TURNED OFF. THE ANTI-LOCK BRAKE SYSTEM BECAME NONFUNCTIONAL…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 45 MPH. THE ANTI-LOCK BRAKE SYSTEM AND PARKING BRAKE WARNING LIGHT INDICATORS ILLUMINATED ON THE INSTRUMENT PANEL. THE WARNING INDICATORS REMAINED ILLUMINATED UNTIL THE ENGINE WAS TURNED OFF. THE ANTI-LOCK BRAKE SYSTEM BECAME NONFUNCTIONAL WITH A SPONGY BRAKE PEDAL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER. THE TECHNICIAN STATED THAT THE ANTI-LOCK BRAKE SYSTEM MODULE REQUIRED REPLACEMENT. THE MANUFACTURER WAS NOTIFIED OF THE MALFUNCTIONS. THE VEHICLE HAS NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE CURRENT MILEAGE WAS 95,800. THE FAILURE MILEAGE WAS 88,000.
NHTSA ODI #10316601
192,800 miles · Dec 30, 2009
Air Bags
TL* THE CONTACT OWNS A 1999 CHEVROLET K1500. WHILE DRIVING 35 MPH. THE AIR BAGS DEPLOYED WITHOUT WARRANT. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. AN INDEPENDENT TECHNICIAN (FRANK TAYLOR)WAS SENT FROM THE DEALER TO INSPECT THE VEHICLE. THE TECHNICIAN SENT A REPORT TO GENERAL MOTORS. GENERAL MOTORS CONTACTED HIM AND …
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TL* THE CONTACT OWNS A 1999 CHEVROLET K1500. WHILE DRIVING 35 MPH. THE AIR BAGS DEPLOYED WITHOUT WARRANT. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. AN INDEPENDENT TECHNICIAN (FRANK TAYLOR)WAS SENT FROM THE DEALER TO INSPECT THE VEHICLE. THE TECHNICIAN SENT A REPORT TO GENERAL MOTORS. GENERAL MOTORS CONTACTED HIM AND INFORMED HIM THAT THE MODULE UNDER THE SEAT HAD DEVELOPED MOISTURE . HE WAS INELIGIBLE FOR A FREE REMEDY. THE FAILURE MILEAGE WAS 192,800. UPDATED 01/29/10 *BF UPDATED 02/01/10.*JB
NHTSA ODI #10297524
95,000 miles · Nov 17, 2009
Service Brakes, Hydraulic
ROTTED BRAKE LINES. *TR
NHTSA ODI #10292588
124,000 miles · Oct 20, 2009
Service Brakes, Hydraulic
UNNECESSARY ABS ACTIVATION AT SLOW SPEED. ABS WHEEL SPEED SENSOR OUTPUT FOUND TO BE LOW. VEHICLE WAS PREVIOUSLY SERVICED BY DEALER (1/18/06) UNDER GM RECALL 05068. SERVICE CONSISTED OF 'REMOVING AND CLEANING ABS WHEEL SPEED SENSORS'. SUBSEQUENT FAILURE INDICATES THAT THE CORRECTIVE ACTION DOES NOT ADEQUATELY ADDRESS THE UNDERLYI…
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UNNECESSARY ABS ACTIVATION AT SLOW SPEED. ABS WHEEL SPEED SENSOR OUTPUT FOUND TO BE LOW. VEHICLE WAS PREVIOUSLY SERVICED BY DEALER (1/18/06) UNDER GM RECALL 05068. SERVICE CONSISTED OF 'REMOVING AND CLEANING ABS WHEEL SPEED SENSORS'. SUBSEQUENT FAILURE INDICATES THAT THE CORRECTIVE ACTION DOES NOT ADEQUATELY ADDRESS THE UNDERLYING DEFECT. *TR
NHTSA ODI #10289125
98,600 miles · Oct 13, 2009
Seats
SUNDAY, OCTOBER 11, 2009 I PULLED THE MANUAL RELEASE LEVER TO RELEASE THE DRIVER'S SIDE SEAT AND LOAD MATERIAL INTO THE EXTENDED CAB OF MY PICKUP. A PLASTIC PIECE WITH METAL COMPONENTS INSIDE THE TRACK (QUOTED FROM DEALER AS A SEAT ADJUSTER) FELL OUT OF THE RIGHT SIDE TRACK. MY DRIVER'S SIDE SEAT WOULD NOT AND CONTINUES NOT TO …
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SUNDAY, OCTOBER 11, 2009 I PULLED THE MANUAL RELEASE LEVER TO RELEASE THE DRIVER'S SIDE SEAT AND LOAD MATERIAL INTO THE EXTENDED CAB OF MY PICKUP. A PLASTIC PIECE WITH METAL COMPONENTS INSIDE THE TRACK (QUOTED FROM DEALER AS A SEAT ADJUSTER) FELL OUT OF THE RIGHT SIDE TRACK. MY DRIVER'S SIDE SEAT WOULD NOT AND CONTINUES NOT TO LOCK INTO PLACE, CAUSING ME TO HAVE TO DRIVE WITH ONE FOOT ON THE FLOORBOARD, AND USE THE OTHER TO ACCELERATE AND BRAKE CONTINUOUSLY. WHEN DRIVEN, THE SEAT FREELY MOVES FORWARD AND BACKWARD WITH CENTRIFUGAL FORCE. NOTE: THE SEATBELT IS ATTACHED TO THE SEAT COMPLETELY, NOT ANCHORED TO THE SIDEWALL AND FLOOR OF THE VEHICLE, SO THERE IS NOTHING TO KEEP A DRIVER FROM SLIDING ALL THE WAY TO THE STEERING WHEEL IF AND WHEN THIS PIECE FAILS. I IMMEDIATELY STOPPED DRIVING THE UNSAFE VEHICLE, AND TRANSPORTED IT TO A LOCAL CHEVROLET DEALERSHIP, FIVESTAR, IN ABERDEEN, WA. THE DEALERSHIP CALLED TODAY, OCTOBER 13, 2009, WITH AN ESTIMATED COST OF JUST OVER $800.00. DEALER SAID THAT BOTH TRACKS NEED REPLACING, BECAUSE NEITHER ONE IS LOCKING. ESTIMATED COST $250.00 PER TRACK, PLUS THE LABOR AND TAXES. I HAVE ORDERED THIS WORK TO BE DONE. *TR
NHTSA ODI #10287311
47,000 miles · Sep 28, 2009
Seats
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE DRIVER SIDE FRONT SEAT WAS UNSTABLE AND THE SEAT MOVES BACK AND FORTH WHILE DRIVING. AN AUTHORIZED TECHNICIAN STATED THAT HE WOULD HAVE TO PAY $430.00 PER SEAT TO REPLACE THE SEAT UNIT. NO REPAIRS WERE MADE. THE MANUFACTURER WAS NOTIFIED, BUT NO ASS…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE DRIVER SIDE FRONT SEAT WAS UNSTABLE AND THE SEAT MOVES BACK AND FORTH WHILE DRIVING. AN AUTHORIZED TECHNICIAN STATED THAT HE WOULD HAVE TO PAY $430.00 PER SEAT TO REPLACE THE SEAT UNIT. NO REPAIRS WERE MADE. THE MANUFACTURER WAS NOTIFIED, BUT NO ASSISTANCE WAS PROVIDED.. THE FAILURE MILEAGE WAS 47,000. THE CURRENT MILEAGE WAS 50,430. UPDATED 10/21/09. *LJ THE CONSUMER STATED BOTH SEATS EXHIBITED THE PROBLEM. UPDATED 10/20/09*JB
NHTSA ODI #10285488
Mileage unknown · Aug 21, 2009
Seat Belts
MY DRIVER SIDE SEAT BELT BROKE FOR MY 1999 CHEVY SILVERADO 1500 PU. SEAT BELTS SHOULD NOT BRAKE. TRYING TO GET DEALER TO FIX AT NO COST. *TR
NHTSA ODI #10281292
50,000 miles · Aug 8, 2009
Service Brakes, Hydraulic
WAS GETTING THE TRUCK INSPECTED AND THE BRAKES FAILED. THE GUY SAID THAT THE BRAKES WERE LOOSE AND HE HAD TO PUSH THE PEDAL ALL THE WAY TO THE FLOOR TO GET THE TRUCK TO STEP. HE ALSO NOTICES CORROSION AND BRAKE FLUID LEAKING. *TR
NHTSA ODI #10279749
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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