IllustrationABS SYSTEM ACTIVATES AT LOW SPEEDS CAUSING A MUCH LONGER TIME TO STOP MY TRUCK. ALMOST ROLLED OUT INTO ON COMING TRAFFIC. ONLY HAPPENS OCCASIONALLY WITHOUT ANY RHYME OR REASON. *JB
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
What owners actually said
614 reportsABS BRAKES START TO CHATTER WHEN BRAKES APPLIED SLOWLY AND WILL NOT STOP MY 2000 CHEVY SILVERADO. A FRIEND HAS A 2003 SILVERADO WITH 35000 MILES AND DID THE SAME THING. HAD TO USE EMERGENCY BRAKE TO STOP. ABS WARNING LIGHT DOES NOT INDICATE A PROBLEM. ALMOST HIT A PARKED CAR IN FRONT OF ME. DEALER WOULD NOT MAKE REPAIRS UNDER W…
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ABS BRAKES START TO CHATTER WHEN BRAKES APPLIED SLOWLY AND WILL NOT STOP MY 2000 CHEVY SILVERADO. A FRIEND HAS A 2003 SILVERADO WITH 35000 MILES AND DID THE SAME THING. HAD TO USE EMERGENCY BRAKE TO STOP. ABS WARNING LIGHT DOES NOT INDICATE A PROBLEM. ALMOST HIT A PARKED CAR IN FRONT OF ME. DEALER WOULD NOT MAKE REPAIRS UNDER WARRANTY FOR MY FRIEND. MY GARAGE CAME UP WITH A 150.00 WORTH OF PARTS TO FIX MINE. I HAVE 76.000 MILES ON MY 2000. *NM
ABS BRAKE MALFUNCTION, VEHICLE HARD TO STOP AT LOW SPEED. *NM
WHAT IS DESCRIBED WITH THE BRAKES IN THE RECALL INFORMATION IS WHAT HAPPENED TO ME YESTERDAY 08/29/05 ON INTERSTATE 69 HERE IN INDIANA. I ALMOST HIT A SEMI TRUCK IN THE REAR IN. I FINALLY GOT MY TRUCK STOPPED BY THROWING IT INTO PARK AFTER NOTHING ELSE WORKED. THEN I WENT TO A REPAIR SHOP AND THEY CHARGED ME $264.00 FOR NEW PADS…
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WHAT IS DESCRIBED WITH THE BRAKES IN THE RECALL INFORMATION IS WHAT HAPPENED TO ME YESTERDAY 08/29/05 ON INTERSTATE 69 HERE IN INDIANA. I ALMOST HIT A SEMI TRUCK IN THE REAR IN. I FINALLY GOT MY TRUCK STOPPED BY THROWING IT INTO PARK AFTER NOTHING ELSE WORKED. THEN I WENT TO A REPAIR SHOP AND THEY CHARGED ME $264.00 FOR NEW PADS AND ROTORS ON THE REAR WHEELS. *JB
OVERLY SENSITIVE SEAT BELT TRIGGER. SLIGHTEST MOVEMENT WHILE DRIVING CAUSES SEAT BELT TO LOCK, RESTRICTING REQUIRED MOVEMENT FOR SAFE VEHICLE OPERATION, SUCH AS LOOKING OVER SHOULDER WHILE DRIVING TO SEE IF SAFE TO CHANGE LANES OR WHILE BACKING OUT OF SPACES. OPERATOR OF VEHICLE MUST FIGHT WITH SEAT BELT UNTIL IT RELEASES. SEAT…
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OVERLY SENSITIVE SEAT BELT TRIGGER. SLIGHTEST MOVEMENT WHILE DRIVING CAUSES SEAT BELT TO LOCK, RESTRICTING REQUIRED MOVEMENT FOR SAFE VEHICLE OPERATION, SUCH AS LOOKING OVER SHOULDER WHILE DRIVING TO SEE IF SAFE TO CHANGE LANES OR WHILE BACKING OUT OF SPACES. OPERATOR OF VEHICLE MUST FIGHT WITH SEAT BELT UNTIL IT RELEASES. SEAT BELT HAS BEEN CHANGED 3 TIMES WITHOUT RESOLVE. THIS HAS BEEN HAPPENING SINCE PURCHASE OF VEHICLE 5 YEARS AGO. *NM
I OWN A 2000 CHEVROLET SILVERADO EXT.CAB 4X4 I AM HAVING A PROBLEM WITH THE ABS ON THIS TRUCK ,ABS COMES ON AT LOW SPEEDS ,THE BRAKE PEDAL GETS VERY HARD AND CANT STOP,THIS IS A VERY DANGEROUS SITUATION .THIS HAS HAPPENED ON MANY OCCASIONS ,DON'T FEEL SAFE DRIVING THIS TRUCK.I HAVE TALKED TO OTHER CHEVROLET TRUCK OWNERS WITH THE…
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I OWN A 2000 CHEVROLET SILVERADO EXT.CAB 4X4 I AM HAVING A PROBLEM WITH THE ABS ON THIS TRUCK ,ABS COMES ON AT LOW SPEEDS ,THE BRAKE PEDAL GETS VERY HARD AND CANT STOP,THIS IS A VERY DANGEROUS SITUATION .THIS HAS HAPPENED ON MANY OCCASIONS ,DON'T FEEL SAFE DRIVING THIS TRUCK.I HAVE TALKED TO OTHER CHEVROLET TRUCK OWNERS WITH THE SAME PROBLEM,I HAVE NOT HIT ANYTHING OR ANYONE YET, CHEVROLET NEEDS TO TAKE CARE OF THIS PROBLEM WITH THEIR TRUCKS BEFORE SOMEONE GETS HURT OR WORSE YET KILLED,THANK YOU FOR YOUR TIME , [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
ANTI-LOCK BRAKES ACTIVATE DURING NORMAL STOP AND GO DRIVING. THIS HAS RESULTED IN NUMEROUS NEAR COLLISIONS. DEFECT REPORTED TO GM CUSTOMER SERVICE REPRESENTATIVE ON 5-24-05.
ABS BRAKES ON MY 2000 SILVERADO WONT STOP ME AT SLOW SPEEDS, BRAKES RACHET AND TRUCK KEEPS GOING
ANTI-LOCK BRAKING MODULATOR VALVE AND MODULE NEEDS TO BE REPLACED. ANTI-LOCK BRAKES ARE NOT FUNCTIONING.
THIS PROBLEM OCCURRED LAST YEAR, BUT I AM JUST NOW REPORTING IT LOOKING AT THE RECENT RECALL OF THIS SAME PICKUP. I OWN A 2000 HALF TON CHEVROLET PU 4X4. I NOTICED THE ANTI-LOCK BRAKES WEREN'T WORKING VERY WELL AT LOW SPEEDS AND MADE A NOISE BEFORE FINALLY STOPPING THE TRUCK. IT WAS GETTING NOTICEABLE AT HIGHER SPEEDS AS TIME…
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THIS PROBLEM OCCURRED LAST YEAR, BUT I AM JUST NOW REPORTING IT LOOKING AT THE RECENT RECALL OF THIS SAME PICKUP. I OWN A 2000 HALF TON CHEVROLET PU 4X4. I NOTICED THE ANTI-LOCK BRAKES WEREN'T WORKING VERY WELL AT LOW SPEEDS AND MADE A NOISE BEFORE FINALLY STOPPING THE TRUCK. IT WAS GETTING NOTICEABLE AT HIGHER SPEEDS AS TIME WENT ON. I TOOK IT TO THE CAR DEALER WHERE I BOUGHT THE TRUCK. NOT ONLY DID THE ANTI-LOCK BRAKE SENSOR NEED REPLACING, BUT SO DID ALL FOUR ROTORS. THEY WERE RUSTED SO BADLY THAT THEY WERE FLAKING AWAY. THIS TRUCK HAD ONLY 14,000 MILES ON IT EVEN THOUGH IT WAS A 2000. IT WAS STORED INSIDE WHEN NOT DRIVEN. GM AGREED TO PAY FOR HALF OF THE REPAIRS BUT NOT ALL. THIS WAS A SAFETY ISSUE, AND I OFFERED TO TAKE THE DEALER TO A JUNK YARD TO SHOW HIM THAT ROTORS DON'T RUST LIKE THESE WERE EVEN AT JUNK YARDS. I STILL HAVE THE ROTORS IF YOUR DEPT. WOULD BE INTERESTED IN LOOKING AT THEM. I BELIEVE THERE IS MORE TO THE STORY THAN GM WAS WILLING TO TELL ME, ESPECIALLY NOTICING THE RECENT RECALL OF THEIR TRUCKS.
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.