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2000 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2000 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
210–25K
3725–50K
8050–75K
10275–100K
152100–150K
97150K+
489 reports with mileage · 125 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 237 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 162 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
69 crash reports5 fire reports25 injury reports
Engine complaints
10 reportsHELLO, I WAS DRIVING AND ALL OF ALL SUDDEN THE CAR WAS NOT ABLE TO MAKE ANOTHER CHANGE AND I STOPPED AND CHECKED THE FRON OF MY CAR AND NOTICE SOMETHING WAS LEAKING FROM THE ENGINE, AND HAD BEEN TOLD THAT IF THE ENGINE HOT DAMAGE I WOULD HAVE TO HAVE A NEW ONE PUT IN. I COULD ONLY SPPED UP TO 35 MPH
ON THE EXHAUST MANIFOLD, THE BOLTS BREAK OFF AT THE HEAD OF THE BOLT WHETHER THE VEHICLE IS IN MOTION OR NOT. SOMETIMES THE BOLTS BREAK OFF FLUSH WITH THE MANIFOLD AND SOMETIMES THEY BREAK OFF FLUSH WITH THE HEAD. I PERSONALLY HAVE HAD 6 OUT OF THE 12 BOLTS ON MY ENGINE BREAK OFF. THE FIX IS TO DRILL OUT THE REMAINING PIECE OF …
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ON THE EXHAUST MANIFOLD, THE BOLTS BREAK OFF AT THE HEAD OF THE BOLT WHETHER THE VEHICLE IS IN MOTION OR NOT. SOMETIMES THE BOLTS BREAK OFF FLUSH WITH THE MANIFOLD AND SOMETIMES THEY BREAK OFF FLUSH WITH THE HEAD. I PERSONALLY HAVE HAD 6 OUT OF THE 12 BOLTS ON MY ENGINE BREAK OFF. THE FIX IS TO DRILL OUT THE REMAINING PIECE OF BOLT (THREADED PART) AND THEN USE A BOLT EXTRACTOR TO REMOVE THE REMAINING PIECE OF BOLT THAT IS STILL SEIZED IN THE HEAD. WELL, THE MOST COMMON BOLT TO BREAK OFF OUT OF THE 12 MANIFOLD BOLTS IS THE ONE DIRECTLY IN FRONT OF THE DRIVERS POSITION. UNFORTUNATELY, THAT IS THE HARDEST BOLT TO REMOVE BECAUSE OF IT'S LOCATION. MOST SHOPS I'VE BEEN TO SAY THAT THE TICKING SOUND THAT YOU HEAR ONCE THIS BOLT BREAKS OFF IS A LOOSE LIFTER. THAT IS INCORRECT! THE TICKING SOUND IS ACTUALLY AN EXHAUST LEAK STEMMING FROM, MOST LIKELY, THE BROKEN BOLT DIRECTLY IN FRONT OF THE DRIVER. THE SOUND GOES AWAY ONCE THE ENGINE WARMS UP BECAUSE OF THE METAL EXPANDING WITH THE TEMPERATURE INCREASE. I HAD 3 MECHANICS UNDER THE HOOD OF MY TRUCK FOR ALMOST 9 HOURS TRYING TO REMOVE THE 6 BOLTS THAT HAD BROKEN ON MY ENGINE. THEY HAD BROKEN EVERY DRILL BIT IN THEIR SHOP (THE SHOP IS A 14 LIFT, 16 BAY SHOP) THAT COULD POSSIBLY BE USED TO DRILL A HOLE FOR THE EXTRACTOR JUST TRYING TO GET A HOLE FOR THE EXTRACTOR TO FIT IN AND THEN THE BOLT EXTRACTOR BROKE OFF IN THE LAST BOLT WHICH HAPPENED TO BE THE ONE DIRECTLY IN FRONT OF THE DRIVER. THEY HAD THE CROSS MEMBER REMOVED AND WERE PREPARING TO DROP MY ENGINE WHEN I TOLD THEM TO JUST STOP THERE. I COULDN'T AFFORD ANY MORE OF A FIX SINCE I WAS $1,800 DEEP INTO THIS ONE DAY AT THE SHOP AS IT WAS. THIS IS SUCH A COMMON PROBLEM THAT THERE ARE AFTERMARKET CONTRAPTIONS TO BOLT ON AND CINCH THE MANIFOLD DOWN WITH ANOTHER BOLT. THAT ISN'T THE RIGHT THING TO DO. THERE SHOULD BE A RECALL AND I SHOULD GET REIMBURSED!
FATAL COLLISION OCCURRED ON 8/20/15 ON SR 126E IN LANE COUNTY, OREGON. VEHICLE DRIFTED OFF ROADWAY AND SUSTAINED FRONTAL IMPACT WITH LARGE TREE RESULTING IN ENGINE FIRE. THIS IS THE THIRD OF THREE CHEV SILVERADOS THAT HAVE BEEN INVOLVED IN FRONTAL IMPACTS THIS YEAR THAT HAS RESULTED IN A FIRE
DRIVING AT APPROXIMATELY 30 MPH, STARTED TO MAKE RIGHT TURN AND ENGINE SUDDENLY SHUT OFF AND JUST AS QUICKLY KICK STARTED. LATER SAME DAY ENGINE SHUT OFF IN PARKING LOT, BUT I WAS ABLE TO IMMEDIATELY RESTART IT. THE NEXT DAY ENGINE DID THE SAME THING (SHUT OFF) BUT AGAIN, I WAS ABLE TO IMMEDIATELY RESTART IT. *TR
MY CAR HAS ONLY 50,400 MILES-ITS A 2009, YESTERDAY WHILE DRIVING I FELT A JOLTING IN THE REAR END OF THE TRUCK AND IT CONTINUED EACH TIME I STOPPED AND STARTED DRIVING AGAIN. I TOOK IT TO MY MECHANIC WHO INFORMED ME IT WAS A TRANSMISSION SHIFTING PROBLEM. I WENT ON LINE AND DISCOVERED THAT THIS ISSUE HAS BEEN RELATED TO OTHER SI…
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MY CAR HAS ONLY 50,400 MILES-ITS A 2009, YESTERDAY WHILE DRIVING I FELT A JOLTING IN THE REAR END OF THE TRUCK AND IT CONTINUED EACH TIME I STOPPED AND STARTED DRIVING AGAIN. I TOOK IT TO MY MECHANIC WHO INFORMED ME IT WAS A TRANSMISSION SHIFTING PROBLEM. I WENT ON LINE AND DISCOVERED THAT THIS ISSUE HAS BEEN RELATED TO OTHER SILVERADO TRUCKS AS A RECALL DUE TO A SHIFT CABLE ADJUSTER PROBLEM WHICH CAN LEAD TO A ROLL AWAY. *JS
COOLANT LEAK (INTERNAL) INTO CRANKCASE MOTOR OVERHEATING, BEARING FAILURE,LOST OF OIL PRESSURE CRACK IN CYLINDER HEADS (CASTECH)#862 *JS
MY TRUCK HAS THE BAD GM CASTECH CYLINDER HEADS THAT LEAK COOLANT INTO THE OIL. GM KNOWS ABOUT THIS PROBLEM VIA GM TSB. DEALER AND MFG. REFUSED TO DO ANYTHING. I FEEL THIS IS NOT A MECHANICAL WEAR ISSUE. IT IS BAD HEADS FROM THE MANUFACTURER. GM SHOULD BE FORCED TO ACKNOWLEDGE THIS ISSUE AND RECALL THE AFFECTED VEHICLE. *TR
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE HAVING THE VEHICLE SERVICED, HE WAS ADVISED THAT THERE WERE NEEDLE BEARINGS IN THE OIL. IN ADDITION, THE ROCKER ARM HAD FAILED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT CONTACTED ABOUT THE ISSUE. THE FAILURE MILEAGE WAS 38,771 AND THE C…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE HAVING THE VEHICLE SERVICED, HE WAS ADVISED THAT THERE WERE NEEDLE BEARINGS IN THE OIL. IN ADDITION, THE ROCKER ARM HAD FAILED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT CONTACTED ABOUT THE ISSUE. THE FAILURE MILEAGE WAS 38,771 AND THE CURRENT MILEAGE WAS 38,850.
EXHAUST MANIFOLD BOLTS BROKE OFF RESULTING IN PINGING NOISE. MY MECHANIC VERIFIED THE BROKEN BOLTS AND TOLD ME THIS COULD LEAD TO OTHER MORE SERIOUS PROBLEMS INCLUDING POSSIBLE FIRE. HE ALSO SUGGESTED I SHOULD CONTACT A GM DEALER TO SEE IF THERE WAS A RECALL FOR THIS PROBLEM. I HAVE BEEN DRIVING FOR MORE THAN 50 YEARS AND I H…
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EXHAUST MANIFOLD BOLTS BROKE OFF RESULTING IN PINGING NOISE. MY MECHANIC VERIFIED THE BROKEN BOLTS AND TOLD ME THIS COULD LEAD TO OTHER MORE SERIOUS PROBLEMS INCLUDING POSSIBLE FIRE. HE ALSO SUGGESTED I SHOULD CONTACT A GM DEALER TO SEE IF THERE WAS A RECALL FOR THIS PROBLEM. I HAVE BEEN DRIVING FOR MORE THAN 50 YEARS AND I HAVE NEVER HAD EXHAUST MANIFOLD BOLTS JUST BREAK OFF. *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.