IllustrationTL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. WHILE THE VEHICLE WAS APPROACHING A STOP AT THE TOP OF A HILL, THE BRAKE LINE RUPTURED AND CAUSED THE VEHICLE TO ROLL BACKWARDS DOWN THE HILL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 190,000.
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
Service Brakes complaints
162 reportsTHE TRANSMISSION IN THIS VEHICLE IS A TOTAL PIECE OF JUNK. THERE ARE MANY, MANY VEHICLES WITH THIS SAME TRANSMISSION. IT LOCKED UP SLINGING THE DRIVER INTO THE STEERING WHEEL AND WINDSHIELD. THIS BROKE THE BOLTS HOLDING THE SEAT TO THE FRAME. THE COST TO FIX WAS OVER 1200 DOLLARS. I'VE TALKED WITH SEVERAL TRANSMISSION SHOPS, EAC…
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THE TRANSMISSION IN THIS VEHICLE IS A TOTAL PIECE OF JUNK. THERE ARE MANY, MANY VEHICLES WITH THIS SAME TRANSMISSION. IT LOCKED UP SLINGING THE DRIVER INTO THE STEERING WHEEL AND WINDSHIELD. THIS BROKE THE BOLTS HOLDING THE SEAT TO THE FRAME. THE COST TO FIX WAS OVER 1200 DOLLARS. I'VE TALKED WITH SEVERAL TRANSMISSION SHOPS, EACH ONE IS IN BUSINESS DUE TO THE FACT THAT THIS TRANSMISSION IS DEFECTIVE. THEY REPAIR OR REPLACE MORE OF THESE THAN ALL OTHER TIMES 400. IT APPEARS THAT THIS PROBLEM HAS BEEN A PROBLEM SINCE FIRST BEING USED. IT ALSO APPEARS THAT NO ONE IS BEING HELD ACCOUNTABLE FOR THE REPAIRS AND/OR DEATHS, INJURY THAT IS BEING CAUSED BY THIS DEFECTIVE UNIT. IT'S OINDTALLED IN MILLIONS OF VEHICLES WORLDWIDE. WHEN IS SOMETHING GOING TO BE DONE ? WHEN IS SOMEONE GOING TO BE HELD ACCOUNTABLE ? STOP THIS MADNESS, PLEASE ! THE TIME IT'S TOOK ME TO FILL OUT THE FORM, DOZENS OF PEOPLE WERE INJURED DUE TO THE ABOVE STATEMENT. *TR
PULLING INTO DRIVEWAY ABS MOTOR BEGAN RUNNING AND NO BRAKING HAD TO RAM INTO PARK TO KEEP FROM HITTING GARAGE. *TR
I WAS LEAVING A BANK PARKING LOT AND WENT TO STOP BEFORE TURNING ONTO THE HIGHWAY. WHEN I APPLIED THE BRAKES, THE PEDAL WENT TO THE FLOOR. LUCKILY, I WAS ON A SLIGHT INCLINE AND WAS ABLE TO STOP THE VEHICLE. THERE WAS A PUDDLE OF BRAKE FLUID UNDER THE FRONT OF THE TRUCK, WHICH WAS COMING FROM A CORRODED LINE BETWEEN THE MAS…
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I WAS LEAVING A BANK PARKING LOT AND WENT TO STOP BEFORE TURNING ONTO THE HIGHWAY. WHEN I APPLIED THE BRAKES, THE PEDAL WENT TO THE FLOOR. LUCKILY, I WAS ON A SLIGHT INCLINE AND WAS ABLE TO STOP THE VEHICLE. THERE WAS A PUDDLE OF BRAKE FLUID UNDER THE FRONT OF THE TRUCK, WHICH WAS COMING FROM A CORRODED LINE BETWEEN THE MASTER CYLINDER AND ABS MODULE. I HAD THE TRUCK TOWED TO MY LOCAL SHOP AND THEY REPLACED TWO BRAKE LINES BETWEEN THE MASTER CYLINDER AND ABS. FAST FORWARD TO APRIL 22, 2012 AND AROUND 37K MILES LATER. I WAS BACKING OUT OF MY DRIVEWAY AND WENT TO STOP. PEDAL WENT TO THE FLOOR, BRAKE FLUID ON THE GROUND. THE BRAKE LINE GOING TO THE RIGHT FRONT WHEEL HAD RUSTED THROUGH ENOUGH THAT IT COULD NOT HOLD THE PRESSURE. THIS LINE I REPLACED MYSELF. AND FINALLY, TODAY, JANUARY 4, 2015, SAME THING. I START MY TRUCK, LET IT RUN FOR A FEW MINUTES. APPLY THE BRAKE TO SHIFT INTO REVERSE, PEDAL GOES DOWN TO THE FLOOR, BRAKE FLUID ON THE GROUND. THIS TIME IT'S THE BRAKE LINE FOR THE REAR BRAKES THAT HAS RUSTED OUT. I AM GOING TO HAVE THIS LINE AND ANY OTHER LINES THAT HAVE NOT BEEN PREVIOUSLY REPAIRED, REPLACED AT MY LOCAL SHOP OR DEALER. THIS IS AN ISSUE THAT GM NEEDS TO TAKE CARE OF! I WAS GOING SLOW WITH EACH OF THESE INCIDENTS, BUT WHAT IF I WAS DOING 70 MPH DOWN THE INTERSTATE AND HAD TO STOP OR SLOW DOWN VERY SUDDENLY AND MY BRAKES FAILED? SOMEONE AND/OR MYSELF COULD HAVE BEEN SERIOUSLY INJURED OR KILLED. MAYBE THAT'S WHAT IT WILL TAKE...FIX IT GM BEFORE SOMEONE GETS HURT! *TR
ABS BRAKES COME ON AT SLOW SPEEDS ON DRY PAVEMENT. *TR
WHILE COMING UP TO AN INTERSECTION MY BRAKE PEDAL SUDDENLY WENT NEARLY TO THE FLOOR. FORTUNATELY THERE WAS NO ONE AHEAD OF ME , NOR WAS THERE ANY CROSS TRAFFIC.. I SOON FOUND OUT THAT MY FRONT BRAKE LINE HAD RUSTED COMPLETELY THROUGH AND HAD LOST ALL BRAKE FLUID TO THE FRONT BRAKES. ALL BRAKE LINES HAD TO BE REPLACED. *TR
AT ABOUT 10 MPH WHEN BRAKING BRAKE PEDDLE GETS HARD ABS TRIES TO ENGAGE. BUT YOU HAVE NO BRAKES. I HAVE HEARD ITS DUE TO A CORRODED ABS SENSORS. WHY THERE IS NO RECALL WHEN THIS IS A SAFETY ISSUE IS BEYOND ME. THIS IS A DESIGN FLAW AS SEVERAL MECHANICS HAVE SAID ON LINE. *TR
DRIVING HOME FROM WORK, WENT TO STOP AT STOP LIGHT, BRAKES WENT TO THE FLOOR AND NO BRAKE LIGHT. CALLED G.M. THEY PUT ME IN A PHONE LOOP NOTHING RESOLVED. *TR
AT LOW SPEED WHEN YOU APPLY THE BRAKES IT FEELS LIKE THE ABS SYSTEM ACTIVATES CAUSING THE TRUCK NOT TO STOP UNTIL YOU PUMP THE BRAKES. *TR
WHEN BRAKING AT LOW SPEEDS THE ABS WOULD COME ON AND THE VEHICLE WOULD NOT STOP ON SOLID DRY PAVEMENT. UPON MY INVESTIGATION WHAT I FOUND WAS THE FRONT HUB BEARING SEAL RUSTED OUT. THIS CAUSED ROAD SALTS/WATER TO ENTER THE HUB ASSY.. THIS THEN CREATED A RUST THAT GATHERED ON THE MAGNETIC ABS SPEED SENSOR . THE GM CAMPAIGN UNDE…
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WHEN BRAKING AT LOW SPEEDS THE ABS WOULD COME ON AND THE VEHICLE WOULD NOT STOP ON SOLID DRY PAVEMENT. UPON MY INVESTIGATION WHAT I FOUND WAS THE FRONT HUB BEARING SEAL RUSTED OUT. THIS CAUSED ROAD SALTS/WATER TO ENTER THE HUB ASSY.. THIS THEN CREATED A RUST THAT GATHERED ON THE MAGNETIC ABS SPEED SENSOR . THE GM CAMPAIGN UNDER NHTSA CAMPAIGN NUMBER: 05V379000 SAYS THIS IS DUE TO AN EXTERIOR RUST ISSUE. THIS IS NOT WHAT I FOUND ! WHEN THE GM PROCEDURE TO REPAIR THIS IS DONE , IT WILL FIX THE PROBLEM FOR A SHORT TIME BECAUSE THE RUSTED GREASE IS REMOVED FROM THE SENSOR TIP . I REPLACED BOTH FRONT HUB ASSY AND THIS IS NOW NOT A DEFECT . MY COMPLAINT IS THAT MANY HAVE REPORTED THAT , THIS IS A ONE TIME FIX, SO IT IS MY BELIEF GM SOLD THIS QUICK FIX TO NHTSA TO CHEAP OUT ON THE REAL FIX , WHICH IS TO REPLACE THE FRONT HUB ASSY AND USE SEALS WITH A RUST RESISTANT METAL . IT IS A LOT CHEAPER TO REMOVE THE RUST OFF THE SENSOR TIP , THAN TO FIX THE REAL CAUSE WHICH IS A RUSTED DAMAGED HUB ASSY DUE TO POOR METAL QUALITY OF THE GREASE/HUB BEARING SEAL. I HAVE BEEN WORKING ON TRANSPORTATION VEHICLES SINCE 1977 INCLUDING VEHICLES WITH ABS BRAKING SYSTEMS . *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.