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
Steering complaints
16 reportsBreak 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.
EVAPORATED SYSTEM.
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. UPON ENTERING AND STARTING THE VEHICLE, THERE WAS A LOUD SNAPPING SOUND WHILE TURNING THE STEERING COLUMN. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC STATED THAT THE PIN IN THE PITMAN ARM SHEARED OFF. THE VEHICLE WAS NOT REPAIRED. TH…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. UPON ENTERING AND STARTING THE VEHICLE, THERE WAS A LOUD SNAPPING SOUND WHILE TURNING THE STEERING COLUMN. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC STATED THAT THE PIN IN THE PITMAN ARM SHEARED OFF. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 150,000. MA 10/2 UPDATED 11/08/2017*CN
WITHOUT WARNING AS I ATTEMPTED TO MAKE A TURN AT LOW SPEED JUST AFTER START UP OF THE ENGINE THE POWER STEERING FAILED. VEHICLE THEN REQUIRED BRUTE STRENGTH TURN TURN.WAS ABLE TO MAKE IT HOME AND GET REPAIRED BUT IF THIS HAD HAPPENED TO DAUGHTER OR WIFE THEY MIGHT NOT HAVE BEEN ABLE TO STEER VEHICLE BECAUSE OF STRENGTH REQUIRED.…
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WITHOUT WARNING AS I ATTEMPTED TO MAKE A TURN AT LOW SPEED JUST AFTER START UP OF THE ENGINE THE POWER STEERING FAILED. VEHICLE THEN REQUIRED BRUTE STRENGTH TURN TURN.WAS ABLE TO MAKE IT HOME AND GET REPAIRED BUT IF THIS HAD HAPPENED TO DAUGHTER OR WIFE THEY MIGHT NOT HAVE BEEN ABLE TO STEER VEHICLE BECAUSE OF STRENGTH REQUIRED. MY MECHANIC THAT REPAIRED VEHICLE STATED THAT HE HAS SEEN THIS OCCUR IN GM VANS BEFORE WITHOUT WARNING. SOMETHING TO DO WITH THE IMMEDIATE FAILURE OF POWER STEERING BOX. $362.00 REPAIR WITH LABOR. *TR
THE VEHICLE WOULD EITHER STALL WHILE DRIVING VARIOUS SPEEDS OR FAIL TO START. I WAS DRIVING APPROXIMATELY 55 MPH WHEN HE NOTICED THAT THE FUEL GAUGE DISPLAYED EMPTY WHICH WAS INACCURATE; HOWEVER, THE VEHICLE SUDDENLY STALLED, COASTED TO THE SHOULDER. CAR WOULD NOT CRANK AT FIRST BUT THEN STARTED, THIS HAPPENED SEVERAL TIMES, T…
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THE VEHICLE WOULD EITHER STALL WHILE DRIVING VARIOUS SPEEDS OR FAIL TO START. I WAS DRIVING APPROXIMATELY 55 MPH WHEN HE NOTICED THAT THE FUEL GAUGE DISPLAYED EMPTY WHICH WAS INACCURATE; HOWEVER, THE VEHICLE SUDDENLY STALLED, COASTED TO THE SHOULDER. CAR WOULD NOT CRANK AT FIRST BUT THEN STARTED, THIS HAPPENED SEVERAL TIMES, THE VEHICLE WOULD SPORADICALLY BECOME HESITANT TO START. THE VEHICLE WOULD ALSO STALL PERIODICALLY WITHOUT WARNING. THE OTHER COMPONENTS, SUCH AS THE RADIO, WERE STILL OPERABLE. THE VEHICLE WOULD SPORADICALLY BECOME HESITANT TO START. THE VEHICLE WOULD ALSO STALL PERIODICALLY WITHOUT WARNING. AUTORIDE SUSPENSION, NOT WORKING. HARSH RIDE WITHOUT SHOCK DAMPERING. FRONT PASSENGER SEATBELT FREQUENTLY LOCKS UP AND WILL NOT EXTEND ENOUGH TO SECURE A PERSON. SEAT BELT OFTEN LOCKS UP WHEN PASSENGER IS BELTED IN AND PASSENGER CANNOT MOVE. *TR
SOMEONE RAN A RED LIGHT AND CREAMED INTO US AT ABOUT 50-55 MPH. THE IMPACT AREA WAS THE PASSENGER WHEEL WELL AREA AND THE IMPACT WAS SO VIOLENT THAT IT SMASHED EVERYTHING OVER AND INCLUDING THE STARTER... OUR AIR BAGS DID NOT DEPLOY AND I ALWAYS WONDERED IF IT WAS BECAUSE THE CRASH SMASHED THE STARTER AND HAD SOMETHING TO DO …
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SOMEONE RAN A RED LIGHT AND CREAMED INTO US AT ABOUT 50-55 MPH. THE IMPACT AREA WAS THE PASSENGER WHEEL WELL AREA AND THE IMPACT WAS SO VIOLENT THAT IT SMASHED EVERYTHING OVER AND INCLUDING THE STARTER... OUR AIR BAGS DID NOT DEPLOY AND I ALWAYS WONDERED IF IT WAS BECAUSE THE CRASH SMASHED THE STARTER AND HAD SOMETHING TO DO WITH THE GM RECALLS NOW. BOTH MY SON AND I HAVE NEVER BEEN THE SAME AFTER THAT CRASH AND NEITHER OF US CAN EVEN SLEEP IN A BED FROM NECK AND BACK PAIN... WE BOTH HAD BRAIN INJURIES AND MINE WAS RATHER SEVERE WHERE I LOST MY SUPERIOR INTELLIGENCE AND PHOTOGRAPHIC MEMORY...AND HAD SEVERE LANGUAGE AND SPEECH PROBLEMS... IT WAS ALMOST LIKE I WAS DYSLEXIC AND I HAVE NEVER BEEN THE SAME. BOTH OUR HEALTH DETERIORATED SINCE... I WAS TOLD 'OUR AIR BAGS WOULD HAVE DEPLOYED' IF IT WOULD HAVE BEEN A HARD IMPACT (WHICH IT WAS), SINCE THE MAN'S CAR WAS TOTALED FOR HOW HE HIT US WITHOUT EVER BRAKING OR SLOWING DOWN... SINCE THE IMPACT WAS THE PASSENGER WHEEL WELL AREA AND CORNER BUMPER CLEAR OVER TO THE DRIVER SIDE AND EVEN BROKE THE STARTER, I WONDER IF THE IGNITION DID SOMETHING TO MAKE THE AIR BAGS NOT DEPLOY. I ALWAYS FELT THERE WAS MORE TO THIS ACCIDENT, BUT NO ONE WOULD DO ANYTHING FOR US. NOW WITH ALL THESE GM RECALLS, I WONDER IF THERE WAS AN ISSUE WITH THIS ACCIDENT. CAN SOMEONE PLEASE LET ME KNOW IF OUR AIRBAGS SHOULD HAVE DEPLOYED WITH SUCH A VIOLENT CRASH AND IF WHEN THE CRASH BROKE THE STARTER IF IT COULD HAVE PREVENTED THE AIR BAGS FROM DEPLOYING? THANK YOU SO VERY MUCH. *TR
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THERE WAS A CLUNKING NOISE IN THE STEERING WHEEL WHEN MAKING ANY TURNS. THE VEHICLE WAS TAKEN TO THE DEALER WHO WAS UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 192,000.
ABOUT A WEEK BEFORE THE STEERING GOT HARD STEERING THE INSTRUMENTAL LITES CAME ON WHEN I WAS DRIVING, THEN WENT OFF THREE DIFFERENT TIMES, THEN I WAS BACKING UP AND TURNING FAIRLY SHARP TO THE RIGHT WHEN THE MOTOR DIED. I STARTED THE ENGINE BACK UP AND MY STEERING WAS HARD TO STEER. ALSO EVERY TIME I TURNED TO THE RIGHT THE …
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ABOUT A WEEK BEFORE THE STEERING GOT HARD STEERING THE INSTRUMENTAL LITES CAME ON WHEN I WAS DRIVING, THEN WENT OFF THREE DIFFERENT TIMES, THEN I WAS BACKING UP AND TURNING FAIRLY SHARP TO THE RIGHT WHEN THE MOTOR DIED. I STARTED THE ENGINE BACK UP AND MY STEERING WAS HARD TO STEER. ALSO EVERY TIME I TURNED TO THE RIGHT THE TIRE SOUND LIKE THE TIRE RUB ON SOMETHING BUT I NEVER SEEN ANY RUB MARKS ANY WHERE. I DO THINK THAT IF I WAS DRIVING DOWN THE STREET THIS COULD HAVE BEEN A VERY SERIOUS SITUATION. I HAVE CHECKED AND SEEN WHERE ALOT OF 2001 CHEVY SUBURBANS HAS HAD THIS PROBLEM AND I BELIEVE THIS IS SOMETHING THAT CHEVY SHOULD DEFINETLY RECALL AND CHECK NO MATTER HOW MANY MILES. *TT
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE VEHICLE HAS EXPERIENCED SEVERAL FAILURES SINCE THE TIME OF PURCHASE. FUEL IS LEAKING FROM UNDERNEATH THE VEHICLE AND THE TIRE RODS AND WHEEL BEARINGS HAD TO BE REPLACED. THE CURRENT MILEAGE IS 90,000 AND FAILURE MILEAGE WAS 66,000.
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.