IllustrationINTERMEDIATE SHAFT IN 2002 CHEVROLET SILVERADO RATTLES SINCE NEW. TEMPORARY FIX HAS BEEN TO GREASE THE SHAFT EVERY FEW MONTHS. NOW GM SAYS DON'T GREASE THE SHAFT, REPLACE IT WITH NEW DESIGN, BUT OF COURSE, THERE ISN'T ANY WARRANTY NOW. *JB
2002 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2002 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
340–25K
4925–50K
7950–75K
10275–100K
124100–150K
55150K+
443 reports with mileage · 66 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. Review the 184 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes, Hydraulic. Review the 164 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 30 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
45 crash reports5 fire reports15 injury reports
What owners actually said
509 reportsTL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 15 MPH, THE VEHICLE BEGAN TO VIBRATE AND SHAKE. THE VEHICLE WOULD ALSO NOT SHIFT INTO REVERSE, SECOND, AND FOURTH GEARS. THE DEALER STATED THAT THE TRANSMISSION REACTION SHELL CAUSED THE FAILURE AND WAS REPLACED AT THE COST OF $1,728. THE CURRENT AND FAILURE …
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TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 15 MPH, THE VEHICLE BEGAN TO VIBRATE AND SHAKE. THE VEHICLE WOULD ALSO NOT SHIFT INTO REVERSE, SECOND, AND FOURTH GEARS. THE DEALER STATED THAT THE TRANSMISSION REACTION SHELL CAUSED THE FAILURE AND WAS REPLACED AT THE COST OF $1,728. THE CURRENT AND FAILURE MILEAGES WERE 57,000. UPDATED 01/11/08. *LJ THE FUEL PUMP AND U-JOINTS WERE REPLACED. UPDATED *JB
THE CABLE HOLDING THE SPARE TIRE ON MY 2002 SILVERADO FAILED,MY TIRE DROPPED FROM THE VEHICLE AND I INITIALLY THOUGHT THAT SOMEONE HAD RAN INTO ME. I LOOKED IN MY REAR VIEW MIRROR AND NOTICED MY TIRE HEADING TOWARDS THE SIDE OF THE ROAD. AFTER RETRIEVING THE TIRE AND THEN LOCATING THE OTHER RELATED HARDWARE, I EXAMINED THE CABLE…
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THE CABLE HOLDING THE SPARE TIRE ON MY 2002 SILVERADO FAILED,MY TIRE DROPPED FROM THE VEHICLE AND I INITIALLY THOUGHT THAT SOMEONE HAD RAN INTO ME. I LOOKED IN MY REAR VIEW MIRROR AND NOTICED MY TIRE HEADING TOWARDS THE SIDE OF THE ROAD. AFTER RETRIEVING THE TIRE AND THEN LOCATING THE OTHER RELATED HARDWARE, I EXAMINED THE CABLE AND IT REMINDED ME OF A PREVIOUS FAILURE I HAD ON A CABLE THAT SUPPORTS THE TAILGATE IN THE OPEN POSITION. WHEN THE CABLE FAILED ON THE TAILGATE, I TOOK MY TRUCK TO THE LOCAL DEALERSHIP AND THEY REPLACED FAILED CABLE, BUT LET ME KNOW THAT THERE WAS A RECALL ON THE CABLES AND WOULD BE ASKED TO RETURN AND BOTH CABLES WOULD BE REPLACED. I WAS CALLED AND THE NEW CABLES WERE INSTALLED. I WAS TOLD THE FAILURES HAD TO DO WITH A ZINC COATING EITHER USED OR NOT USED. I WAS CURIOUS IF THE SAME ISSUE COULD APPLY TO THE FAILURE OF THE CABLE THAT HOLDS THE SPARE TIME? *JB
TRANSMISSION OF 2002 CHEVROLET TAHOE FAILED FOR THE SECOND TIME. 79,000 MILES. HAD BEEN DRIVING ON FREEWAY TO DESTINATION. 10 YARDS FROM DESTINATION I PUT THE CAR IN REVERSE, BUT REVERSE DID NOT WORK. CAR IN DRIVE SUDDENLY HAD SAME WHINE AS WHEN OEM TRANSMISSION BROKE. NEEDED 2ND NEW TRANSMISSION. *TR
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE APPLYING THE BRAKES BETWEEN 5 AND 10 MPH, THE ABS PULSATES AND THE VEHICLE WILL NOT STOP. THE FAILURE CAUSED THE VEHICLE TO CRASH INTO A FENCE. THE BUMPER WAS DENTED. THE CONTACT STATED THAT THE BRAKES PULSATE 8 OUT OF 10 TIMES AND INCREASE THE VEHICLE'S STOPPING DIS…
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TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE APPLYING THE BRAKES BETWEEN 5 AND 10 MPH, THE ABS PULSATES AND THE VEHICLE WILL NOT STOP. THE FAILURE CAUSED THE VEHICLE TO CRASH INTO A FENCE. THE BUMPER WAS DENTED. THE CONTACT STATED THAT THE BRAKES PULSATE 8 OUT OF 10 TIMES AND INCREASE THE VEHICLE'S STOPPING DISTANCE. HE HAS HAD ONE ABS SENSOR UNPLUGGED IN ORDER TO DEACTIVATE THE ABS. NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES:HYDRAULIC:ANTILOCK) WAS REFERENCED. THE CURRENT AND FAILURE MILEAGES WERE 73,500. UPDATED 01/11/08. *LJ UPDATED *JB
PARKING BRAKE PEDAL WENT TO THE FLOOR AND DID NOT HOLD.
WHILE DRIVING VEHICLE BEGAN TO SMOKE FROM ENGINE COMPARTMENT, NOISE CAME FROM ENGINE COMPARTMENT, VEHICLE SIGNIFICANTLY LOST POWER. DRIVER COULD NOT SHUT OFF ENGINE....STARTER WAS TRYING TO CRANK ENGINE-EVEN WHEN IGNITION WAS IN SHUT OFF POSITION. ENGINE SUDDENLY DID NOT HAVE FULL POWER. SMOKE AND BURNING SMELL CONTINUED TO I…
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WHILE DRIVING VEHICLE BEGAN TO SMOKE FROM ENGINE COMPARTMENT, NOISE CAME FROM ENGINE COMPARTMENT, VEHICLE SIGNIFICANTLY LOST POWER. DRIVER COULD NOT SHUT OFF ENGINE....STARTER WAS TRYING TO CRANK ENGINE-EVEN WHEN IGNITION WAS IN SHUT OFF POSITION. ENGINE SUDDENLY DID NOT HAVE FULL POWER. SMOKE AND BURNING SMELL CONTINUED TO INCREASE FROM ENGINE COMPARTMENT WITH NO WAY TO SHUT OFF ENGINE. GM RELAY #12193614 WAS REPLACED, AS WELL AS BURNT OUT STARTER. RELAY IS AVAILABLE TO NHTSA. GM WAS NOT INTERESTED ACCESSING PART WHEN OFFERED TO THEM. *TR
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 10 MPH, THE VEHICLE BECAME DIFFICULT TO STOP WHEN THE ABS ATTEMPTED TO ENGAGE. THE DEALER STATED THAT THE FAILURE WAS CAUSED BY THE SPEED SENSOR AND THE ABS HUB. THE CURRENT AND FAILURE MILEAGES WERE 59,000.
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH THE VEHICLE LOST THE ABILITY TO STOP WHEN HE ATTEMPTED TO MAKE A TURN. THE ROAD CONDITIONS WERE NORMAL. THE VEHICLE WAS TOWED TO THE DEALER AND THEY STATED THAT THE BRAKE LINES RUSTED WHICH CAUSED BRAKE FLUID TO LEAK. THE DEALER REPLACED TWO BRAKE LINES…
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TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 30 MPH THE VEHICLE LOST THE ABILITY TO STOP WHEN HE ATTEMPTED TO MAKE A TURN. THE ROAD CONDITIONS WERE NORMAL. THE VEHICLE WAS TOWED TO THE DEALER AND THEY STATED THAT THE BRAKE LINES RUSTED WHICH CAUSED BRAKE FLUID TO LEAK. THE DEALER REPLACED TWO BRAKE LINES AND THE CONTACT WAS ADVISED TO REPAIR THE OTHER BRAKE LINES THAT STARTED TO RUST. THE CURRENT AND FAILURE MILEAGES WERE 90,000.
CHEVROLET SILVERADO ABS FAILURE , LOSS OF BRAKES WHEN TRAVELING OVER SMALL BUMPS OR WET ROADS. ALSO LOSS OF PARKING BRAKE. DEALER SAID IT WAS ONLY ON MANUAL TRANSMISSION TRUCKS THAT HAD THE FAILURE...THIS IS NOT TRUE. ALL TRUCKS.*AK
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.