IllustrationI OWN A 2001 CHEVROLET SILVERADO TRUCK THE ANTI- LOCK BRAKES WILL ENGAGE FOR NO REASON CAUSING INCREASED STOPPING DISTANCES, FORTUNATLY THE ONLY THING THAT WAS HIT WAS A CURB.
2001 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2001 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 1500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
290–25K
3825–50K
7150–75K
8075–100K
102100–150K
65150K+
385 reports with mileage · 83 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 147 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 133 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
48 crash reports5 fire reports20 injury reports
What owners actually said
468 reportsWHEN COMING TO A STOP, THE BRAKES ON MY 2001 CHEY SILVERADO WILL SUDDENLY STOP BRAKING AT LOW SPEED. TWICE THIS WEEK WHILE PARKING, I NEARLY HIT THE VEHICLE IN FRONT OF ME. I FIND IT PATICULARLY BAD WHEN TURNING. THIS HAS BEEN GOING ON FOR THE PAST THREE MONTHS, AND SEEM TO BE GETTING WORSE. I HAVE HAD THE BRAKES INSPECTED R…
Read full complaint
WHEN COMING TO A STOP, THE BRAKES ON MY 2001 CHEY SILVERADO WILL SUDDENLY STOP BRAKING AT LOW SPEED. TWICE THIS WEEK WHILE PARKING, I NEARLY HIT THE VEHICLE IN FRONT OF ME. I FIND IT PATICULARLY BAD WHEN TURNING. THIS HAS BEEN GOING ON FOR THE PAST THREE MONTHS, AND SEEM TO BE GETTING WORSE. I HAVE HAD THE BRAKES INSPECTED RECENTLY BY A MECHANIC AND NOTHING WRONG WAS FOUND WITH THE PADS OR ROTORS.
BRAKE ANTI-LOCK SYSTEM CYCLES AT LOW SPEEDS INCREASING STOPPING DISTANCE. *JB
WHILE TRYING TO COME TO A STOP UPON ENTERING A PARKING SPOT IN FRONT OF A COUNTY HEALTH BLDG. THE BRAKE PEDAL ON MY TRUCK DID NOT RESPOND. THE PEDAL WENT HARD AND THE TRUCK CONTINUED FORWARD, I APPLIED THE BRAKE AGAIN WITH THE SAME RESULTS CAUSING THE TRUCK TO STRIKE THE BUILDING AND DESTROY A SERVICE ENTERANCE DOOR. I ESTIMATE…
Read full complaint
WHILE TRYING TO COME TO A STOP UPON ENTERING A PARKING SPOT IN FRONT OF A COUNTY HEALTH BLDG. THE BRAKE PEDAL ON MY TRUCK DID NOT RESPOND. THE PEDAL WENT HARD AND THE TRUCK CONTINUED FORWARD, I APPLIED THE BRAKE AGAIN WITH THE SAME RESULTS CAUSING THE TRUCK TO STRIKE THE BUILDING AND DESTROY A SERVICE ENTERANCE DOOR. I ESTIMATE MY SPEED TO HAVE BEEN UNDER 5 MPH SINCE THE AIRBAG DID NOT DEPLOY. I BELIEVE THIS IS THE RESULT OF A DEFFECTIVE ANTI-LOCK BRAKE SENSOR. AS OF TODAY I HAVE NOT BEEN TO THE DEALER TO HAVE THE FAILURE FIXED.
DT THE DEALERSHIP CAME ON JUNE 27TH, 2005. THE DIFFERENTIAL THAT DRIVES THE WHEELS IN THE BACK ON THE VAN MADE A NOISE. TOOK VEHICLE TO THE DEALER 5 OR 6 TIMES, THEY REBUILT IT TWICE, AND KEPT SAYING IT WAS ALRIGHT TO DRIVE. MY WIFE WAS DRIVING , AND IT LOCKED UP. THE VEHICLE IS CURRENTLY AT THE DEALERSHIP. *AK
THE BRAKES ON THE T RUCK ARE NOT RIGHT. THEY WORK OKAY BUT WHEN YOU ARE GOING ABOUT 5 MILES PER HOUR AND HIT THE BRAKE, THE ABS COMES ON MAKES A GRATING NOISE THAT YOU CAN BOTH FEEL AND HEAR. I HAVE HAD EVERYTHING CHECKED AND THIS IS WHAT IS THE PROBLEM. WHEN THIS PROBLEM OCCURS IT TAKES LONGER TO STOP THAN NORMAL. THE NOISIE IS…
Read full complaint
THE BRAKES ON THE T RUCK ARE NOT RIGHT. THEY WORK OKAY BUT WHEN YOU ARE GOING ABOUT 5 MILES PER HOUR AND HIT THE BRAKE, THE ABS COMES ON MAKES A GRATING NOISE THAT YOU CAN BOTH FEEL AND HEAR. I HAVE HAD EVERYTHING CHECKED AND THIS IS WHAT IS THE PROBLEM. WHEN THIS PROBLEM OCCURS IT TAKES LONGER TO STOP THAN NORMAL. THE NOISIE IS ALSO KIND OF SCARY. I HAVE HAD TO PUT NEW ROTORS ON THE F RONT OF THE T RUCK AND BOTH ROTORS AND PADS ON THE BACK. ALL OF THEM WERE RUSTED AND PITTED. THE TRUCK ONLY HAS ABOUT 26,000 MILES ON IT AND IT DOESN'T GET HARD USE.
I HAD PROBLEMS WITH THE ABS BRAKES ENGAGING AT SLOW SPEED AND WHEN COMING TO A STOP ON MY 2001 CHEVY SILVERADO. IN NOVEMBER 2004 THE BRAKES FAILED TO STOP THE VEHICLE (ABS WAS ENGAGED ON DRY PAVEMENT) WHEN PULLING OUT OF A DRIVEWAY ONTO A BUSY HIGHWAY, RESULTING IN A NEAR COLLISION WITH ANOTHER VEHICLE. REPAIRS WERE DONE AT…
Read full complaint
I HAD PROBLEMS WITH THE ABS BRAKES ENGAGING AT SLOW SPEED AND WHEN COMING TO A STOP ON MY 2001 CHEVY SILVERADO. IN NOVEMBER 2004 THE BRAKES FAILED TO STOP THE VEHICLE (ABS WAS ENGAGED ON DRY PAVEMENT) WHEN PULLING OUT OF A DRIVEWAY ONTO A BUSY HIGHWAY, RESULTING IN A NEAR COLLISION WITH ANOTHER VEHICLE. REPAIRS WERE DONE AT A LOCAL GM DEALER AND THEY HAD TO REPLACE SENSORS IN THE WHEELS BECAUSE OF CORROSION, I BELIEVE AS A RESULT OF DEFECTIVE ENGINEERING. MY TRUCK HAD LESS THAN 40,000 MILES ON IT, AND WAS DRIVEN IN A NORMAL FASHION WHEN THE PROBLEM FIRST APPEARED.
I HAVE HAD PROBLEMS WITH ABS BRAKES, FIRST THE RIGHT FRONT BEARING HUB WEAR AND TIRE VIBRATION, THEN THE ABS AND BRAKE LIGHTS CAME ON, WILL STAY ON THEN EXTINGUISH AND COME AGAIN AND STAY ON, ABS DOES NOT WORK.
UPON TAKING MY TRUCK TO GET INSPECTED, I WAS INFORMED THE EMERGENCY BRAKE WAS COMPLETELY SHOT. I TOOK THE TRCUK TO THE DEALER TO GET IT REPLACED AND WAS THEN TOLD THAT ALL FOUR BRAKES WERE GONE (DOWN TO THE ROTORS). THE TRUCK ONLY HAS 42,000 MILES AND WAS NOT DRIVEN THAT HARD SINCE PURCHASED.
ANTI-LOCK BRAKES ENGAGING AT SLOW SPEEDS IN CLEAR AND DRY WEATHER. WOULD NOT STOP IN TIME WHILE TRYING TO PARK IN A HOSPITAL PARKING LOT . VEHICLE WENT PAST INTENDED STOP IN LOT AND JUST MISSED A PEDESTRIAN. TRUCK WAS STOPPED BY CURB. TRUCK WAS TAKEN TO LOCAL SHOP NOT UNDER WARRANTY. CAUSE OF BRAKING PROBLEM WAS CORROSION ON WHE…
Read full complaint
ANTI-LOCK BRAKES ENGAGING AT SLOW SPEEDS IN CLEAR AND DRY WEATHER. WOULD NOT STOP IN TIME WHILE TRYING TO PARK IN A HOSPITAL PARKING LOT . VEHICLE WENT PAST INTENDED STOP IN LOT AND JUST MISSED A PEDESTRIAN. TRUCK WAS STOPPED BY CURB. TRUCK WAS TAKEN TO LOCAL SHOP NOT UNDER WARRANTY. CAUSE OF BRAKING PROBLEM WAS CORROSION ON WHEEL SENSORS. REAR SENSORS WHERE CLEANED. FRONT LEFT CALIPER AND PADS WERE DAMAGED REQUIRING REPLACEMENT OF BOTH FRONT CALIPERS( REPLACEMENT IN SET ONLY REQUIRED)WILL CHECK TO SEE IF OLD PART IS STILL AVAILABLE. REAR SENSORS HAVE NOT BEEN REPLACED.
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
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.