IllustrationABS locks up because of faulty wheel speed sensors known problem locking up brake pedal resulting in loss of control of vehicle causing collisions and dangerous situations.
2001 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2001 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
290–25K
3825–50K
7150–75K
8075–100K
102100–150K
65150K+
385 reports with mileage · 83 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 147 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 133 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Fuel System, Gasoline. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
48 crash reports5 fire reports20 injury reports
Service Brakes complaints
133 reportsThe gm/gmc trucks with abs are unsafe and dangerous to the drivers and other pedestrians and vehicles on all roads. The Abs module light comes on and the brake warning light after driving normally and occasionally on its own and after a bump in the road. The abs system is unavailable/disabled when the light is on, the abs syst…
Read full complaint
The gm/gmc trucks with abs are unsafe and dangerous to the drivers and other pedestrians and vehicles on all roads. The Abs module light comes on and the brake warning light after driving normally and occasionally on its own and after a bump in the road. The abs system is unavailable/disabled when the light is on, the abs system has stopped and the light turned on when applying the brakes hard to avoid other vehicles and other actions such as steering away to avoid an accident arenecessary. While doing research on this problem I discovered that many gm/gmc pickup trucks have this problem with abs failure and the only sure repair being to replace the abs/ebcm module, there are codes stored for the abs system showing it has failed and stopped working. This problem is so large that an aftermarket industry has grown to address this issue providing rebuilt modules. I worked for a chevrolet dealership for 19 years and am an ase master technician and tested my own silverado and have had to replace my abs module, at my own cost as nearly all other owners, to ensure that I and my wife will be safe while driving. Please make the manufacturers responsible and liable for repairs/replacement so that the truck owners and others sharing the roads stay safe and alive.
Break line and break system has been giving issues and failure has occur. To the point of almost causing an accident. Steering issues several times. Pick-up truck suspension since newer truck has had big issues. Please remediate.
The contact owns a 2001 Chevrolet Silverado 1500. The contact stated that the check engine warning light, low fuel warning light, and the ABS warning light were illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage…
Read full complaint
The contact owns a 2001 Chevrolet Silverado 1500. The contact stated that the check engine warning light, low fuel warning light, and the ABS warning light were illuminated. The vehicle was not diagnosed nor repaired by an independent mechanic or the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 200,000.
The parking brake will fail without warning. The only way that it will work is with continuous adjustment. It has been repaired by a mechanic only to fail again. This has been a recurring problem since I purchased the vehicle in 2011.
THE REAR BRAKE LINE ON MY 2001 CHEVT 1500 SILVERADO RUSTED INTO. IS WAS NOT A SALT CORRISON. MANY TRUCKS HAVE THIS ISSUE. I WORK IN A PARTS STORE AND A MAN CAME IN LAST WEEK WITH THE SAME PROBLEM. IT IS KNOW THESE CHECY TRUCKS IN THIS YEAR DO THIS. I HOPE U CAN TAKE THIS SERIOUS AND HAVE GM TO CORRECT IT BEFORE SOMEONE GETS KILL…
Read full complaint
THE REAR BRAKE LINE ON MY 2001 CHEVT 1500 SILVERADO RUSTED INTO. IS WAS NOT A SALT CORRISON. MANY TRUCKS HAVE THIS ISSUE. I WORK IN A PARTS STORE AND A MAN CAME IN LAST WEEK WITH THE SAME PROBLEM. IT IS KNOW THESE CHECY TRUCKS IN THIS YEAR DO THIS. I HOPE U CAN TAKE THIS SERIOUS AND HAVE GM TO CORRECT IT BEFORE SOMEONE GETS KILLED IF THEY HAVEN'T ALREADY. I RAN OFF THE ROAD DUE TO IT BREAKING AND SLIDE UPON A FENCE. WHEN I PUSHED ON THE BRAKE . I HAD NOTHING NO BRAKES AT ALL. PLEASE HELP. THANK YOU
BRAKE SYSTEM FAILURE: SEPTEMBER 16, 2018 REAR BRAKE LINE SNAPPED WHILE DRIVING CAUSING IMMEDIATE LOSS OF BRAKE FLUID AND LOSS OF BRAKING. OWNER WAS DRIVING 20 MPH ON DIRT ROAD AND WAS ABLE TO STOP VEHICLE USING 4WHEEL DRIVE LOW. BRAKE LINE WAS REPLACED 9/18/2018 AND THE MECHANIC NOTED HE'D NEVER SEEN ANYTHING SNAP LIKE THAT BEFO…
Read full complaint
BRAKE SYSTEM FAILURE: SEPTEMBER 16, 2018 REAR BRAKE LINE SNAPPED WHILE DRIVING CAUSING IMMEDIATE LOSS OF BRAKE FLUID AND LOSS OF BRAKING. OWNER WAS DRIVING 20 MPH ON DIRT ROAD AND WAS ABLE TO STOP VEHICLE USING 4WHEEL DRIVE LOW. BRAKE LINE WAS REPLACED 9/18/2018 AND THE MECHANIC NOTED HE'D NEVER SEEN ANYTHING SNAP LIKE THAT BEFORE WITHOUT EVIDENCE OF DIRECT DAMAGE. ON INSPECTION BRAKE FLUID WAS CORRODED DESPITE HAVING BEEN RECENTLY CHANGED OUT. BRAKE SYSTEM SECOND FAILURE: ON APRIL 16, 2019 VEHICLE FAILED TO COME TO A STOP WHILE OWNER WAS BRAKING FOR A STOP SIGN. VEHICLE SLOWED BUT DIDN'T STOP DESPITE BRAKES APPLIED. OWNER WAS TICKETED FOR FAILURE TO STOP. OWNER ON TURNING VEHICLE ON AFTER TRAFFIC STOP SAW ABS LIGHT NOW ON (WASN'T ON PRIOR TO THIS) AND ON BRAKING TO TURN VEHICLE THEN FAILED TO BRAKE COMPLETELY AT WHICH POINT BOTH ABS DASH LIGHT AND RED BRAKE WARNING LIGHTS CAME ON. OWNER AGAIN STOPPED VEHICLE USING 4 WHEEL DRIVE LOW. OWNER IMMEDIATELY INSPECTED VEHICLE'S BRAKE FLUID LEVELS AND FOUND FLUID WAS AGAIN LOW DESPITE HAVING JUST BEEN SERVICED ON APRIL 10, 2019 WITH ENGINE REPLACEMENT AND BRAKE INSPECTION. OWNER ADDED FLUID, LOOKED FOR LEAKS AND ON "PUMPING UP THE BRAKES" FELT SUFFICIENT PRESSURE TO THEN TAKE THE VEHICLE BACK TO THE REPAIR SHOP THAT REPLACED THE ENGINE AND INSPECTED BRAKES 6 DAYS PRIOR. THE VEHICLE WAS EVALUATED BY LICENSED MECHANICS AND DETERMINED TO HAVE HAD ABS MODULE FAILURE, BRAKE FLUID FAILURE (AGAIN) AND COMPLETE BRAKE SYSTEM FAILURE. THE ABS CONTROL MODULE WAS REPAIRED/REPLACED, BRAKE FLUID WAS EVACUATED, FLUSHED AND REPLACED. THE VEHICLE HAS BEEN MAINTAINED WITH REGULAR BRAKE SYSTEM MAINTENANCE. IT HAS NOT BEEN ABUSED OR SUBJECT TO ANY CONDITIONS THAT WOULD CAUSE THE TYPE OF BRAKE SYSTEM FAILURES THAT IT IS EXPERIENCING. BECAUSE OF VIN FOR THIS VEHICLE IT WAS NOT INCLUDED IN GM RECALL FOR VEHICLES HAVING THESE PROBLEMS
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS OVER BUMPS IN THE ROAD, THE BRAKES SLIPPED AND THE PEDAL WAS STIFF. THE VEHICLE WOULD NOT RESPOND AND THE EMERGENCY BRAKE WAS ENGAGED TO STOP THE VEHICLE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT CALLED PARAMUS CHEVROLET (94 NJ-17…
Read full complaint
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS OVER BUMPS IN THE ROAD, THE BRAKES SLIPPED AND THE PEDAL WAS STIFF. THE VEHICLE WOULD NOT RESPOND AND THE EMERGENCY BRAKE WAS ENGAGED TO STOP THE VEHICLE. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT CALLED PARAMUS CHEVROLET (94 NJ-17, PARAMUS, NJ 07652, (201) 261-7100) AND INFORMED THEM OF THE FAILURE. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AND DID NOT ASSIST. THE FAILURE MILEAGE WAS 60,000.
I'VE HAD MULTIPLE EXTREMELY DANGEROUS SITUATION WITH THIS VEHICLE OVER 2 YEARS. ONE OF THE FIRST CONCERN WAS MY HEADLIGHT DAYTIME BULBS MELTED TO THE HARNESS AND THE ONE ON THE PASSENGER SIDE MELTED THRU THE NUMBER SO I STARTED CARRYING A FIRE EXTINGUISHER BEHIND THE DRIVER SEAT. BUT ONE OF THE MOST DANGEROUS INDECENT HAPPENED W…
Read full complaint
I'VE HAD MULTIPLE EXTREMELY DANGEROUS SITUATION WITH THIS VEHICLE OVER 2 YEARS. ONE OF THE FIRST CONCERN WAS MY HEADLIGHT DAYTIME BULBS MELTED TO THE HARNESS AND THE ONE ON THE PASSENGER SIDE MELTED THRU THE NUMBER SO I STARTED CARRYING A FIRE EXTINGUISHER BEHIND THE DRIVER SEAT. BUT ONE OF THE MOST DANGEROUS INDECENT HAPPENED WHILE DRIVING DOWN THE HIGHWAY WHEN MY WHEEL BEARING HUB GAVE OUT N THERE IS NOTHING ELSE TO SUPPORT THE TIRE ONTO THE TRUCK SO MY FRONT DRIVER TIRE WENT FLYING OFF N MY TRUCK COMING TO A COMPLETE STOP INTO THE GROUND CAUSING DAMAGE TO MY SELF, MY FINDER, THE WHEEL SENSOR, N THE DRIVER DOOR. AFTER GETTING ALL THAT FIXED I'M AFRAID OF THE OTHER HUBS GIVING OUT. ALSO WHEN I HIT MY BRAKES IT SEEMS LIKE THERE IS AIR IN THE PEDAL N THE TRUCK WILL NOT STOP. I DON'T KNOW IF IT'S BC THE SENSOR GOT DAMAGED OR IF THE ABS BOX IS DAMAGE FROM CORROSION AND MY EMERGENCY BRAKE HAS NEVER SEEM TO DO ANYTHING. I HAVE REPLACED MANY OF PARTS ON THIS TRUCK N WHEN I DO IT SEEMS LIKE ONE THING AFTER ANOTHER.
THE BRAKES FAILED DUE TO CORROSIVE FAILURE OF BRAKE LINES. COMPLETE REPLACEMENT.
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.