IllustrationISSUE WITH THE ABS BRAKES. SOMETIMES THE ABS KICKS IN AND DOESN'T ALLOW YOU TO STOP. *TR
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 reportsAT UNDER 60,000 MILES BOTH BRAKE LINES FROM MASTER CYLINDER WERE BADLY RUSTED. ONE LINE FAILED AND THE OTHER WAS IN IMMINENT DANGER OF FAILURE. THIS IS AN EXTREMELY DANGEROUS PROBLEM AND CHEVROLET HAS BEEN RESISTING A RECALL FOR YEARS. THIS TRUCK WAS DRIVEN MOSTLY IN A NON-SALTED ROADS STATE. IT IS UNACCEPTABLE TO HAVE BRAKE LIN…
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AT UNDER 60,000 MILES BOTH BRAKE LINES FROM MASTER CYLINDER WERE BADLY RUSTED. ONE LINE FAILED AND THE OTHER WAS IN IMMINENT DANGER OF FAILURE. THIS IS AN EXTREMELY DANGEROUS PROBLEM AND CHEVROLET HAS BEEN RESISTING A RECALL FOR YEARS. THIS TRUCK WAS DRIVEN MOSTLY IN A NON-SALTED ROADS STATE. IT IS UNACCEPTABLE TO HAVE BRAKE LINES RUSTED THROUGH IN UNDER 60,000 MILES. CHEVY TRIES TO CUT COSTS AND SAVE A FEW PENNIES ON A COMPONENT THAT IS CRITICAL TO LIFE SAFETY AND THEY REFUSE TO MAKE IT RIGHT WHEN THEIR COST-CUTTING SCHEME FAILS. MY SECOND AND LAST CHEVY. *TR
HERCULES TIRES 26575R 116 OWL HERCULES TERRA TRAC A/T 11 WORE OUT WITH ONLY 3800 MILES NOT ONLY ONCE BUT TWICE DEALER SAID I IT WAS BAD DRIVING NEVE IN MY 56 YRS DID I HAVE A TIRE WEAR THIS FAST THEY ARE DEATH TRAPS KOST TIRE CHARGE ROAD HAZARD WHEN IT ALL READY CAME WITH THE TIRE AND DID NOTHING TO RECTIFY THE PROBLEM CAN YO…
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HERCULES TIRES 26575R 116 OWL HERCULES TERRA TRAC A/T 11 WORE OUT WITH ONLY 3800 MILES NOT ONLY ONCE BUT TWICE DEALER SAID I IT WAS BAD DRIVING NEVE IN MY 56 YRS DID I HAVE A TIRE WEAR THIS FAST THEY ARE DEATH TRAPS KOST TIRE CHARGE ROAD HAZARD WHEN IT ALL READY CAME WITH THE TIRE AND DID NOTHING TO RECTIFY THE PROBLEM CAN YOU HELP ME ON THIS PLEASE. *TR
PULLED OUT OF PARKING LOT AT LOW SPEED AND STOPPED TO WAIT FOR A RED LIGHT. WHILE STOPPED WITH FOOT ON BRAKE PEDAL, BRAKE PEDAL SUDDENLY DROPPED TO THE FLOOR. WHEN LIGHT TURNED GREEN I ACCELERATED SLOWLY AND TESTED THE BRAKES TO FIND THE STOPPING POWER OF THE VEHICLE REDUCED TO NEAR ZERO. PULLED OVER IN A SAFE AREA AFTER A FE…
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PULLED OUT OF PARKING LOT AT LOW SPEED AND STOPPED TO WAIT FOR A RED LIGHT. WHILE STOPPED WITH FOOT ON BRAKE PEDAL, BRAKE PEDAL SUDDENLY DROPPED TO THE FLOOR. WHEN LIGHT TURNED GREEN I ACCELERATED SLOWLY AND TESTED THE BRAKES TO FIND THE STOPPING POWER OF THE VEHICLE REDUCED TO NEAR ZERO. PULLED OVER IN A SAFE AREA AFTER A FEW BLOCKS AND INSPECTED VEHICLE TO FIND FLUID SPRAYED AROUND FRONT PASSENGER WHEEL WELL AND DRIPPING FROM BRAKE LINE. SUSPECT SUDDEN BRAKE LINE RUPTURE HAD OCCURRED. DECIDED VEHICLE WAS UNSAFE TO OPERATE AND PARKED IT AWAITING TOW. *TR
I OWN A 2002 CHEVROLET SILVERADO 1500. THE BRAKES FAILED WHILE ATTEMPTING TO STOP THE VEHICLE IN A 35MPH ZONE. THE BRAKES INITIALLY WORKED AND THEN THE PEDAL WENT TO THE FLOOR. I COULD FEEL THE ABS ENGAGE BUT NOT STOP HITTING A VEHICLE IN FRONT OF ME. WHEN I EXITED THE VEHICLE I COULD SMELL THE BRAKE FLUID AND OBSERVED FLUID LEA…
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I OWN A 2002 CHEVROLET SILVERADO 1500. THE BRAKES FAILED WHILE ATTEMPTING TO STOP THE VEHICLE IN A 35MPH ZONE. THE BRAKES INITIALLY WORKED AND THEN THE PEDAL WENT TO THE FLOOR. I COULD FEEL THE ABS ENGAGE BUT NOT STOP HITTING A VEHICLE IN FRONT OF ME. WHEN I EXITED THE VEHICLE I COULD SMELL THE BRAKE FLUID AND OBSERVED FLUID LEAKING FROM MULTIPLE LOCATIONS. THE AIR BAGS DID NOT DEPLOY. THE DRIVER OF THE VEHICLE SUSTAINED INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE IS CURRENTLY BEING REPAIRED BY THE MANUFACTURES DEALER. *TR
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 55 MPH, THE CONTACT SMELLED FUEL INSIDE THE VEHICLE. THE CONTACT DISCOVERED FUEL LEAKING UNDERNEATH THE VEHICLE. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE AND A CERTIFIED MECHANIC STATED THAT THE FUEL LINE WAS RUSTED. THE VEHICLE WAS NOT REPAIRED. THE MAN…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 55 MPH, THE CONTACT SMELLED FUEL INSIDE THE VEHICLE. THE CONTACT DISCOVERED FUEL LEAKING UNDERNEATH THE VEHICLE. THE VEHICLE WAS TOWED TO THE CONTACT'S RESIDENCE AND A CERTIFIED MECHANIC STATED THAT THE FUEL LINE WAS RUSTED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 138,000.
TL* THE CONTACT OWNED A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKES FAILED WHILE DRIVING DOWNHILL. AS A RESULT, THE VEHICLE WAS CRASHED INTO A TREE. THE AIR BAGS FAILED TO DEPLOY. THE DRIVER WAS INJURED AND THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOT NOTIFIED. THE SPEED WAS UNKNOWN. THE APPROXIMATE…
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TL* THE CONTACT OWNED A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKES FAILED WHILE DRIVING DOWNHILL. AS A RESULT, THE VEHICLE WAS CRASHED INTO A TREE. THE AIR BAGS FAILED TO DEPLOY. THE DRIVER WAS INJURED AND THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOT NOTIFIED. THE SPEED WAS UNKNOWN. THE APPROXIMATE FAILURE MILEAGE WAS 100,000.
PEDAL WENT TO THE FLOOR, RUSTED BRAKE LINE, GOT TO REPLACE 3 OF THE LINES... *TR
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE IDLING, THE VEHICLE SUDDENLY ACCELERATED WITHOUT ANY WARNINGS. THE CONTACT WAS ABLE TO STOP THE VEHICLE BY SHIFTING INTO THE NEUTRAL POSITION. THE VEHICLE WAS TAKEN TO THE DEALER. HOWEVER, THE VEHICLE WAS NOT DIAGNOSED. THE MANUFACTURER WAS NOT M…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE IDLING, THE VEHICLE SUDDENLY ACCELERATED WITHOUT ANY WARNINGS. THE CONTACT WAS ABLE TO STOP THE VEHICLE BY SHIFTING INTO THE NEUTRAL POSITION. THE VEHICLE WAS TAKEN TO THE DEALER. HOWEVER, THE VEHICLE WAS NOT DIAGNOSED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 200,000 THE CURRENT MILEAGE WAS 344,000. UPDATED 0/8/14*CN
RUSTED BRAKE LINES CAUSED A NEAR ACCIDENT WHEN THE LINE BROKE, RESULTING IN LOSS OF BRAKING ABILITIES. *TR
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.