IllustrationBRAKE LINES HAVE RUSTED THROUGH. FIRST THE REAR BRAKE LINE BURST. A FEW MONTHS LATER A FRONT LINE BURST. BOTH TIMES VEHICLE WAS IN MOTION.
1999 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 1999 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
130–25K
3725–50K
6150–75K
6275–100K
141100–150K
104150K+
418 reports with mileage · 169 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 222 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 126 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 53 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
43 crash reports5 fire reports18 injury reports
Service Brakes complaints
126 reportsTL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 800 (1500). WHILE THE CONTACT WAS PULLING INTO A PARKING SPOT, THE ANTI-LOCK BRAKES SEIZED ABRUPTLY AND THE VEHICLE ALMOST STRUCK A TREE. THE VIN WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC); HOWEVER, THE CONTACT DID NOT REMEMBER BEING NOTIFIED. THE …
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TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 800 (1500). WHILE THE CONTACT WAS PULLING INTO A PARKING SPOT, THE ANTI-LOCK BRAKES SEIZED ABRUPTLY AND THE VEHICLE ALMOST STRUCK A TREE. THE VIN WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC); HOWEVER, THE CONTACT DID NOT REMEMBER BEING NOTIFIED. THE FAILURE WAS SIMILAR TO THE SYMPTOMS LISTED IN THE RECALL. THE CONTACT CALLED THE MANUFACTURER AND A CASE NUMBER WAS PROVIDED. NO FURTHER ASSISTANCE WAS OFFERED. JEFF BARNES CHEVROLET (6110 SYKESVILLE RD, ELDERSBURG, MD 21784, (410) 970-6363) MADE AN APPOINTMENT FOR THE RECALL REPAIR PROMPTLY. THE VEHICLE WAS NOT DIAGNOSED. THE FAILURE MILEAGE WAS 150,000.
BRAKE LINES RUSTED AND BROKE. THIS CAUSED A LOSS OF BRAKING ABILITY AND A NEAR ACCIDENT. BRAKE LINE MATERIALS USED WERE INFERIOR AND THIS PRESENTS A SAFETY RISK FOR ALL OWNERS. GM SHOULD REPLACE ALL REGISTERED VEHICLES WITH STAINLESS STEEL LINES.
ANTI-LOCK BRAKE FAILURE EMPLOYS WHEN NOT NEEDED AND AT LOW SPEEDS IN MOTION .VERY DANGEROUS !!! !!!
COMPLETE BRAKE FAILURE. STEEL LINES RUSTED AND BURST. ON SIDE STREET, SLOWING DOWN TO STOP BEFORE ENTERING THE HIGHWAY ON DOWN HILL LOCATION. STEPPED ON BRAKES, LINE FAILED, JUST MISSED REAR ENDING VEHICLE IN FRONT OF ME, WAS ABLE TO SHIFT IN REVERSE AND GET STOPPED BEFORE ENTERING HIGHWAY.
BRAKE LINES RUSTED OUT CAUSING ME TO BE IN AN ACCIDENT IN MOTION
METALLIC BRAKE LINES RUSTED OUT. COMPLETE LOSS OF BRAKES.FORTUNATELY I WAS IN MY DRIVEWAY GETTING READY TO LEAVE & HEARD A SLIGHT POPPING NOISE & LOST ABILITY TO STOP. GOT OUT & BRAKE FLUID ALL OVER DRIVEWAY..UNABLE TO ADD PHOTOS,TRUCK WAS TOWED TO SERVICE STATION IMMEDIATELY AFTERWARDS
HAD TO HAVE ALL THE BRAKE LINES REPLACED. THE LINES BURST DUE TO THEM ALL BEING RUSTED OUT AND CORRODED. I HAVE A 1994 TOYOTA PICK UP TRUCK WITH MORE MILES THAN MY 1999 CHEVY SILVERADO AND THE BRAKE LINES ARE NOT RUSTED OR CORRODED GO FIGURE! I WAS APPROACHING A TRAFFIC LIGHT AND WHEN I APPLIED THE BRAKES, THE BRAKE PEDDLE W…
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HAD TO HAVE ALL THE BRAKE LINES REPLACED. THE LINES BURST DUE TO THEM ALL BEING RUSTED OUT AND CORRODED. I HAVE A 1994 TOYOTA PICK UP TRUCK WITH MORE MILES THAN MY 1999 CHEVY SILVERADO AND THE BRAKE LINES ARE NOT RUSTED OR CORRODED GO FIGURE! I WAS APPROACHING A TRAFFIC LIGHT AND WHEN I APPLIED THE BRAKES, THE BRAKE PEDDLE WENT ALL THE WAY DOWN TO THE FLOOR. I PULLED OVER AND LOOKED UNDER THE TRUCK AND SAW A PUDDLE OF BRAKE FLUID ON THE GROUND UNDERNEATH THE DRIVERS DOOR AND GAS TANK. I HAD THE VEHICLE TOWED TO THE LOCAL CHEVROLET DEALER AND ALL THE BRAKE LINES WERE REPLACED FOR $1066.33. I WAS CHARGE FOR 8 HOURS OF LABOR. I AM PISSED OFF AND WILL NEVER BUY ANOTHER CHEVROLET VEHICLE, BECAUSE OF THEIR USE OF SUBSTANDARD MATERIAL ON THE MOST IMPORTANT PART (BRAKES) OF THEIR VEHICLES AND THEIR FAILING TO ACKNOWLEDGE & CORRECT THIS SERIOUS PROBLEM WITH THESE MODEL YEAR TRUCKS WHEN IT WAS BROUGHT TO THEIR ATTENTION, INSTEAD THEY MADE BOGUS EXCUSES AS TO WHY THESE BRAKE LINES WERE FAILING! I HAVE PURCHASE NINE CHEVROLET VEHICLES IN MY LIFE AND LIKE I STATED EARLIER I WILL NEVER BUY ANOTHER CHEVROLET AGAIN AND WILL DISCOURAGE EVERYONE I KNOW THAT IS IN THE MARKET TO PURCHASE A VEHICLE TO NOT BUY A CHEVROLET BECAUSE, THE WAY CHEVROLET FAILED TO RESOLVE THE BRAKE LINE PROBLEM WITH THESE TRUCKS IS UNACCEPTABLE!
ABS SYSTEM CONTINUOSLY GOES OUT.
WHILE TOWING A HEAVY TRAILER AT 30 MPH, I ATTEMPTED TO STOP AT A RED LIGHT. WITH NO BRAKE WARNING LIGHT, THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD NO BRAKING WHATEVER. I STOMPED ON THE EMERGENCY BRAKE AND NOTHING HAPPENED. I WAS ABLE TO TAKE A HARD RIGHT TURN TO AVOID A COLLISION AND COASTED TO A STOP. LOOKING DOWN, THERE …
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WHILE TOWING A HEAVY TRAILER AT 30 MPH, I ATTEMPTED TO STOP AT A RED LIGHT. WITH NO BRAKE WARNING LIGHT, THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD NO BRAKING WHATEVER. I STOMPED ON THE EMERGENCY BRAKE AND NOTHING HAPPENED. I WAS ABLE TO TAKE A HARD RIGHT TURN TO AVOID A COLLISION AND COASTED TO A STOP. LOOKING DOWN, THERE WAS A TRAIL OF BRAKE FLUID LEADING TO A LARGE PUDDLE UNDER THE DRIVER'S DOOR. LOOKING UNDER THE TRUCK REVEALED THAT INCREDIBLY RUSTED BRAKES LINES HAD BURST, DRAINING THE ENTIRE CONTENTS OF THE FLUID RESERVOIR. CLOSER INSPECTION SHOWED THAT EVERY FOOT OF BRAKE LINE UNDER THE TRUCK WAS IN SIMILAR CONDITION! AFTER TOWING IT HOME, I DISCOVER WHY THE E-BRAKE FAILED; THE CABLE WAS RUSTED SOLID. I HAD TO ORDER A COMPLETE BRAKE LINE KIT AND SPENT THE ENTIRE WEEKEND REPLACING THEM. IT WAS THEN THAT I FOUND OUT THAT THOUSANDS OF OWNERS HAVE BEEN FIGHTING GM TO MAKE GOOD ON THIS DEFECT. WE NARROWLY ESCAPED A SERIOUS ACCIDENT AND SPENT A CONSIDERABLE AMOUNT OF TIME AND MONEY, BESIDES HAVING TO BORROW A VEHICLE TO GET TO WORK FOR A WEEK.
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.