IllustrationTHE AIR DID NOT STAY IN THE TIRE. THE AREA WHERE THE VALVE STEM GOES HAS COMPLETE CORROSION. *AK *JB
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
What owners actually said
587 reportsWHEN SHIFTING INTO NEUTRAL TO TEST THE EMERGENCY THE BRAKES, THE VEHICLE ROLLED FORWARD. THE BRAKES FAILED TO HOLD THE VEHICLE. THE DEALER STATED THAT THIS WAS NORMAL. *AK *SC *JB
PROBLEMS WITH ABS SYSTEM ON 1999 CHEVROLET K1500.*MR BEFORE THE CONSUMER TURNED OFF THE ENGINE THE ABS LIGHT ILLUMINATED ON THE DASH. WHEN THE IGNITION WAS OFF THE CONSUMER HEARD A GRINDING NOISE WHICH ORIGINATED UNDER THE VEHICLE. THE CONSUMER CRAWLED UNDER THE VEHICLE AND UNPLUGGED THE ABS AND THE NOISE STOPPED. THE VEHICL…
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PROBLEMS WITH ABS SYSTEM ON 1999 CHEVROLET K1500.*MR BEFORE THE CONSUMER TURNED OFF THE ENGINE THE ABS LIGHT ILLUMINATED ON THE DASH. WHEN THE IGNITION WAS OFF THE CONSUMER HEARD A GRINDING NOISE WHICH ORIGINATED UNDER THE VEHICLE. THE CONSUMER CRAWLED UNDER THE VEHICLE AND UNPLUGGED THE ABS AND THE NOISE STOPPED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DETERMINED THAT THE EBCM SHORTED OUT. THE CONSUMER WAS TOLD THAT THIS IS A COMMON PROBLEM WITH THIS MODEL CHEVROLET. *NM
PARKED MY 1999 CHEVROLET K PICKUP AT A STORE AND JUST BEFORE I TURNED THE ENGINE OFF, THE ABS LIGHT CAME ON. WHEN THE IGNITION WAS OFF, THERE WAS A GRINDING NOISE FROM UNDER THE VEHICLE. APPARENTLY THE ABS MODULE WAS STILL RUNNING. I CRAWLED UNDER THE VEHICLE AND UNPLUGGED IT. WHEN I TOOK IT TO MY GM MECHANIC, HE TOLD ME THA…
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PARKED MY 1999 CHEVROLET K PICKUP AT A STORE AND JUST BEFORE I TURNED THE ENGINE OFF, THE ABS LIGHT CAME ON. WHEN THE IGNITION WAS OFF, THERE WAS A GRINDING NOISE FROM UNDER THE VEHICLE. APPARENTLY THE ABS MODULE WAS STILL RUNNING. I CRAWLED UNDER THE VEHICLE AND UNPLUGGED IT. WHEN I TOOK IT TO MY GM MECHANIC, HE TOLD ME THAT THE EBCM SHORTED OUT AND APPARENTLY HAPPENS FREQUENTLY TO THIS MODEL. IT COST ME $781 FOR THE PART PLUS LABOR OF $202.50. I WAS UNIMPRESSED, ESPECIALLY TO FIND OUT THAT THERE HAS BEEN SO MUCH PROBLEM WITH THIS AND THAT THERE IS NO RECALL FOR IT. CAN YOU HELP? ISN'T THIS A SAFETY ISSUE? MY VEHICLE ONLY HAS 50496 MILES ON IT.*AK
I PURCHASED MY 1999 GM TRUCK AND I HAVE HAD PROBLEMS WITH THE TRANSMISSION SINCE I PURCHASED IT. I HAD THE TRANSMISSION SERVICED TWICE AND I WAS TOLD THAT IT WAS FINE. NOW MY TRANSMISSION IS SKIPPING FIRST GEAR AND GOING STRAIGHT INTO SECOND GEAR. THE VEHICLE WARRANTY, OF COURSE, HAS NOW EXPIRED. MY SISTER-IN-LAW ALSO HAS A …
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I PURCHASED MY 1999 GM TRUCK AND I HAVE HAD PROBLEMS WITH THE TRANSMISSION SINCE I PURCHASED IT. I HAD THE TRANSMISSION SERVICED TWICE AND I WAS TOLD THAT IT WAS FINE. NOW MY TRANSMISSION IS SKIPPING FIRST GEAR AND GOING STRAIGHT INTO SECOND GEAR. THE VEHICLE WARRANTY, OF COURSE, HAS NOW EXPIRED. MY SISTER-IN-LAW ALSO HAS A 1999 GM VAN, AND HER TRANSMISSION HAS TO BE REPLACED. SHE WAS EXPERIENCING THE SAME CONDITIONS I HAVE AND SHE HAD HER VEHICLE INTO SERVICE FOR THE SAME ISSUES I HAVE. MY SON'S GIRLFRIEND'S MOTHER HAS A 1999 GM SUBURBAN AND SHE HAS JUST HAD HER TRANSMISSION REPLACED. SHE HAD EXPERIENCED THE SAME PROBLEMS MY SISTER-IN-LAW AND MYSELF HAVE EXPERIENCED AND SHE TOO HAS HAD HER VEHICLE IN FOR SERVICE FOR THE SAME ISSUES. I CANNOT BELIEVE GM HAS NOT HAD A RECALL ON THEIR TRANSMISSIONS THAT WERE PLACED IN 1999 GM TRUCK-TYPE VEHICLES. THIS IS OUTRAGEOUS. I AM RESEARCHING TO SEE HOW MANY OTHER PEOPLE WHO BOUGHT 1999 GM TRUCK-TYPE VEHICLES HAVE HAD THE SAME PROBLEMS. *AK
WHILE DRIVING 45 MPH LEFT FRONT TIRE BLEW OUT. THIS CAUSED THE DRIVER TO PULL OFF THE ROAD. CONSUMER INDICATED THERE WAS NO OBJECT ON THE ROAD. FIRESTONE, WILDERNESS LE, TIRE SIZE P265/75R16. *AK *SC *JB
THE ACCELERATOR PEDAL STICKS AND CANNOT BE PUSHED DOWN TO ACCELERATE THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER WHICH CLEANED AND ADJUSTED THE THROTTLE BODY. THE DEALER RECOMMENDS THAT THE THROTTLE BODY RECEIVE REGULAR MAINTENANCE EVERY 30,000 MILES. PLEASE PROVIDE FURTHER DETAILS. *NM *LA
ABS PUMP WENT OUT, LUCKLY I HAD AN EXTENDED WARRANTY AND ONLY HAD TO PAY $100.00 INSTEAD OF $800.00. ALSO MANY OTHER TRUCKS IN THE AREA WITH SAME PROBLEM. HAD KLUNKING NOISE IN REAR END CARRIED TO TWO DIFFERENT DEALER SHIPS AND COULD NOT FIND ANYTHING. SOUNDED LIKE TRANSMISSION WAS PLAYING CATCH UP WITH REAREND. THREE MONTHS AFT…
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ABS PUMP WENT OUT, LUCKLY I HAD AN EXTENDED WARRANTY AND ONLY HAD TO PAY $100.00 INSTEAD OF $800.00. ALSO MANY OTHER TRUCKS IN THE AREA WITH SAME PROBLEM. HAD KLUNKING NOISE IN REAR END CARRIED TO TWO DIFFERENT DEALER SHIPS AND COULD NOT FIND ANYTHING. SOUNDED LIKE TRANSMISSION WAS PLAYING CATCH UP WITH REAREND. THREE MONTHS AFTER WARRANTY GOES OUT IT DOES THE SAME THING AND BUST THE GEARS IN TRANSMISSION. MOTOR SOUNDS LIKE IT IS KNOCKING WHEN YOU FIRST CRANK IT UP. THE DEALERSHIPS AROUND ARE QUICK TO SELL YOU A CAR BUT WILL NOT STAND BEHIND YOU WHEN THERE ARE PROBLEMS. THIS WILL PROBALLY BE MY LAST CHEVY!!! *JB
WHILE DRIVING AT AN UNDETERMINED SPEED EMERGENCY BRAKE LIGHT ILLUMINATED. CONSUMER CONTACTED DEALERSHIP ON FOUR SEPARATE OCCASIONS, BUT THE PROBLEM STILL OCCURS. *AK
THE THROTTLE ON MY 1999 CHEVROLET LS 1500 IS STICKING EVERYTIME I TAKE OFF FROM A START, THIS IS MAKING IT DANGEROUS TO THE POINT THAT I AM PUSSING ON THE GAS WITH EXTREME PRESSURE.*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.