NHTSA owner reports · September 18, 2026 snapshot.
Suspension complaints
23 reportsClear category filter101,455 miles · Jan 17, 2013
Suspension
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING AT LOW SPEEDS AND MAKING A TURN, HE HEARD A LOUD CLUNKING NOISE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THEY INFORMED HIM THAT THE SHACKLE ON THE REAR PASSENGER'S SIDE OF THE LEAF SPRING WAS SEVERELY RUSTED. THE VEHICLE WA…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING AT LOW SPEEDS AND MAKING A TURN, HE HEARD A LOUD CLUNKING NOISE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THEY INFORMED HIM THAT THE SHACKLE ON THE REAR PASSENGER'S SIDE OF THE LEAF SPRING WAS SEVERELY RUSTED. THE VEHICLE WAS REPAIRED FOR THE PASSENGER'S SIDE SHACKLE. THE MANUFACTURER WAS CONTACTED AND OFFERED NO ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 101,455. THE CURRENT MILEAGE WAS APPROXIMATELY 102,000. THE VIN WAS UNAVAILABLE. UPDATED 02/20/13*LJ
NHTSA ODI #10493297
94,642 miles · Nov 9, 2011
Service Brakes, HydraulicSuspension
I'VE HAD TO REPLACE ALL MY BRAKE COMPONENTS SUCH AS, ROTORS, CALIPERS, BRAKE LINES, BACKING PLATES, ALSO THE REAR LEAF SPRING SHACKLES HAD TO BE REPLACED AND WELDED IN ALL DUE TO METAL CORROSION OR RUST. NOW MY LATEST PROBLEM IS THE REAR SHOCK MOUNTS HAVE BROKEN DUE TO RUST SO NOW MY SHOCKS ARE JUST DANGLING AROUND NOT DOING ANY…
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I'VE HAD TO REPLACE ALL MY BRAKE COMPONENTS SUCH AS, ROTORS, CALIPERS, BRAKE LINES, BACKING PLATES, ALSO THE REAR LEAF SPRING SHACKLES HAD TO BE REPLACED AND WELDED IN ALL DUE TO METAL CORROSION OR RUST. NOW MY LATEST PROBLEM IS THE REAR SHOCK MOUNTS HAVE BROKEN DUE TO RUST SO NOW MY SHOCKS ARE JUST DANGLING AROUND NOT DOING ANYTHING TO PREVENT ME FROM GETTING INTO AN ACCIDENT. BUT IT DOESN'T STOP THERE, THE REAR CROSSMEMBER THAT GOES FROM ONE END OF THE FRAME TO THE OTHER IS ALSO ROTTED THROUGH SO NOW I CAN'T EVEN REPAIR THE SHOCK MOUNTS BECAUSE THEY MOUNT TO THIS CROSSMEMBER WHICH IS NOW A PIECE OF ROTTED METAL! I CAN'T BELIEVE HOW FAST THIS TRUCK HAS ROTTED THROUGH, I HAVE A 1984 PONTIAC GRAND PRIX AND I HAVE NEVER HAD TO CHANGE OR REPLACE ANY OF THESE PARTS BECAUSE OF RUST. I HAVE READ THAT GM HAD USED CHEAPER METAL FROM CHINA ON THEIR MODEL TRUCKS FROM 1999-2004 AND DIDN'T STOP USING THEM UNTIL ALL OF THE COMPLAINTS STARTED TO SURFACE. WHY DOESN'T GM TAKE RESPONSIBILITY FOR THE USE OF SHODDY MATERIALS AND COMPENSATE ALL THE HARD WORKING PEOPLE WHO HAVE PURCHASED THEIR TRUCKS FOR THESE YEARS!!!!!! *TR
NHTSA ODI #10435029
118,000 miles · Apr 12, 2011
Service Brakes, HydraulicSuspension
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STARTED THE IGNITION, AND WHEN PRESSURE WAS APPLIED TO THE BRAKE HIS FOOT IMMEDIATELY TRAVELED TO THE FLOOR WITHOUT A RESPONSE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THEY STATED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS REPA…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STARTED THE IGNITION, AND WHEN PRESSURE WAS APPLIED TO THE BRAKE HIS FOOT IMMEDIATELY TRAVELED TO THE FLOOR WITHOUT A RESPONSE. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THEY STATED THAT THE BRAKE LINE FAILED DUE TO RUST CORROSION. THE VEHICLE WAS REPAIRED. IN ADDITION, THE REAR SHOCK SUPPORT BEAM FRACTURED, AND THE CONTACT WAS UNSUCCESSFUL IN LOCATING THE PART FOR THE REPAIR. THE FAILURE MILEAGE WAS 118,000.
NHTSA ODI #10395569
72,500 miles · Jan 26, 2011
Suspension
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE APPLYING THE BRAKES UNDER 10 MPH THE BRAKE PEDAL PULSATED, MAKING THE VEHICLE DIFFICULT TO STOP. THE CONTACT HAD NOT TAKEN THE VEHICLE TO THE DEALER OR CALLED THE MANUFACTURER. THE CONTACT STATED THAT THE VEHICLE WAS REPAIRED UNDER THE RECALL, S…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE APPLYING THE BRAKES UNDER 10 MPH THE BRAKE PEDAL PULSATED, MAKING THE VEHICLE DIFFICULT TO STOP. THE CONTACT HAD NOT TAKEN THE VEHICLE TO THE DEALER OR CALLED THE MANUFACTURER. THE CONTACT STATED THAT THE VEHICLE WAS REPAIRED UNDER THE RECALL, SERVICE BRAKES, HYDRAULIC:ANTILOCK ( 05V379000) BUT IT DID NOT REMEDY THE FAILURE. THE FAILURE MILEAGE WAS 72,500. UPDATED 03/10/11 *BF THE CONSUMER WANTS THE COMPLAINT DISREGARDED. THE PROBLEM WAS CAUSED BY A BEARING FAILURE AND NOT ABS FAILURE. UPDATED 05/23/11
NHTSA ODI #10378808
99,000 miles · May 12, 2010
StructureSuspension
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP TO HAVE THE CATALYTIC CONVERTER REPLACED. THE MECHANIC STATED THAT THE FRAME AND FRONT SUSPENSION LINE AND FITTINGS WERE SEVERELY CORRODED. THE DEALER WAS CONTACTED AND ADVISED THAT THERE WERE NO RELATED RECALLS FOR HIS VIN. THE MA…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP TO HAVE THE CATALYTIC CONVERTER REPLACED. THE MECHANIC STATED THAT THE FRAME AND FRONT SUSPENSION LINE AND FITTINGS WERE SEVERELY CORRODED. THE DEALER WAS CONTACTED AND ADVISED THAT THERE WERE NO RELATED RECALLS FOR HIS VIN. THE MANUFACTURER WAS NOT NOTIFIED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 99,000 AND THE CURRENT MILEAGE WAS 102,000.
NHTSA ODI #10330173
140,000 miles · Feb 19, 2009
Suspension
I HAVE NOTICED THAT MY 2000 SILVERADO LEANS ON THE DRIVERS SIDE DUE TO COIL SPRING DEFECT.IV'E SEEN OTHER SILVERADOS ON THE ROAD BODY STYLES BETWEEN 99-02 THAT ALSO LEANS ON THE DRIVERS SIDE.THIS IS SOMETHING THAT SHOULD BE LOOKED INTO AS A RECALL . *TR
NHTSA ODI #10259408
Mileage unknown · Jun 14, 2002
Suspension
WHILE DRIVING AT ANY SPEED AND WITHOUT WARNING VEHICLE WILL DRIFT TO THE RIGHT OR LEFT. DEALER HAS BEEN NOTIFIED; HOWEVER, HAS NOT FOUND REMEDY FOR PROBLEM.*AK
NHTSA ODI #8011844
Mileage unknown · Dec 4, 2000
SuspensionTires
THE VEHICLE PULLS TO THE RIGHT AND VIBRATES AT 63 MPH SINCE THE DAY OF PURCHASE, CONSUMER HAS BEEN TO THE DEALER ON THREE OCCASIONS AND REPLACED THE TIRES (NO MAKE/MODEL PROVIDED) THREE TIMES, HOWEVER THE VEHICLE STILL DOES NOT DRIVE PROPERLY. *MJS
NHTSA ODI #785094
Mileage unknown · Nov 29, 2000
Suspension
WHILE VEHICLE IS BEING DRIVEN AT ANY RATE OF SPEED VEHICLE SEVERELY PULLS TO RIGHT. DRIVER CONTINOUSLY HAS TO KEEP STEERING WHEEL TO LEFT FOR VEHICLE TO GO STRAIGHT, CAUSE UNKNOWN. DEALER CANNOT IDENTIFY THE CAUSE. PLEASE GIVE ANY FURTHER DETAILS. *AK
NHTSA ODI #875651
Mileage unknown · Jun 5, 2000
SteeringSuspension
POWER STEERING SHAFT SNAPPED, CAUSING LOSS OF POWER STEERING. TOOK VEHICLE TO DEALER, AND DEALER PUT ANOTHER PUMP IN. WHILE ON VACATION AROUND MAY 5TH, SHAFT BROKE AGAIN, AND ON JUNE 2ND, POWER STEERING WENT OUT. CURRENTLY, VEHICLE IS AT DEALER'S REPAIR SHOP. *AK THE VEHICLE MAKES NOISE WHEN TURNING LEFT. *YH
NHTSA ODI #863001
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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