NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
468 reports7,000 miles · Jun 21, 2016
Engine
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 70 MPH, THE VEHICLE LOST POWER. THE CONTACT HAD TO ROLL THE VEHICLE A MILE DOWN THE ROAD. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE DISTRIBUTOR WAS FULL OF WATER, WHICH BURNED THE COIL AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING 70 MPH, THE VEHICLE LOST POWER. THE CONTACT HAD TO ROLL THE VEHICLE A MILE DOWN THE ROAD. THE VEHICLE WAS TOWED TO THE DEALER WHERE IT WAS DIAGNOSED THAT THE DISTRIBUTOR WAS FULL OF WATER, WHICH BURNED THE COIL AND NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED; HOWEVER, THE FAILURE RECURRED NUMEROUS TIMES. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 7,000.
NHTSA ODI #10875712
114,500 miles · Jun 20, 2016
Service Brakes
ABS ENGAGED MAKING IT IMPOSSIBLE TO STOP AND CAUSING ME TO RUN OVER PARKING LOT STOP CURB AND ALMOST DOWN INTO A LAKE. MY GRANDMA CHEVROLET AND THEY SAID IT HAD BEEN FIXED IN 2008 UNDER A RECALL AND AS SUCH WOULDN'T FIX IT AGAIN EVEN THOUGH IT IS THE SAME PROBLEM SUPPOSEDLY FIXED.
NHTSA ODI #10875207
110,522 miles · May 8, 2016
Service Brakes
BRAKE LINES RUSTED THROUGH, FAIL FAILURE DO TO FAULTY BRAKE LINES. WHY ARNT BRAKE LINES STAINLESS STEEL. THIS IS A HUGE SAFTEY HAZZARD. NEED TO BE RECALLED.
NHTSA ODI #10863828
210,000 miles · May 6, 2016
Service Brakes
BRAKE LINES RUSTED OUT AND BURST LEAVING US WITH NO BRAKES AND UNABLE TO STOP. ALMOST IN A COLLISION, AND LEFT US STRANDED. TWO TIMES THIS HAPPENED WITH TWO DIFFERENT BRAKE LINES BURSTING AT LOW SPEED. LUCKILY WE WEREN'T GOING FAST.
NHTSA ODI #10863535
157,000 miles · Apr 21, 2016
Service Brakes
VEHICLE WAS DRIVING/BRAKING FINE IN/AROUND TOWN AND ON HIGHWAY. NOTICED THAT IT WAS BECOMING HARDER TO GET TRUCK TO STOP AS BRAKE PEDAL WAS GRADUALLY GETTING CLOSER TO FLOOR BEFORE BRAKES WOULD START SLOWING TRUCK DOWN. STOPPED AT RESTAURANT TO EAT, WHEN I CAME BACK OUT TO LEAVE, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR. …
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VEHICLE WAS DRIVING/BRAKING FINE IN/AROUND TOWN AND ON HIGHWAY. NOTICED THAT IT WAS BECOMING HARDER TO GET TRUCK TO STOP AS BRAKE PEDAL WAS GRADUALLY GETTING CLOSER TO FLOOR BEFORE BRAKES WOULD START SLOWING TRUCK DOWN. STOPPED AT RESTAURANT TO EAT, WHEN I CAME BACK OUT TO LEAVE, THE BRAKE PEDAL WENT ALL THE WAY TO THE FLOOR. HAD TRUCK TOWED TO A MECHANIC I TRUST. HE INFORMED ME THAT THIS WAS A KNOWN PROBLEM FOR THIS MODEL AND YEAR VEHICLE. HE ALSO SAID THAT ALL OF THE BRAKE LINES WERE CORRODED AND THAT ONE HAD RUPTURED (IT WAS SPRAYING A MIST WHEN THE PEDAL WAS PUSHED). HE REPAIRED THE RUPTURED LINE, TOPPED OFF THE FLUID, AND BLED THE BRAKES, BRAKES WORK AGAIN, BUT I'M CONCERNED THAT THE OTHER CORRODED LINES MAY RUPTURE WHEN I NEED THE BRAKES THE MOST. COST OF THIS REPAIR INSTANCE WAS $387. DEALER QUOTE TO REPLACE ALL THE LINES WAS $1500. MECHANIC SAID THAT THE LINES ALL RUN VERY CLOSE TO EACH OTHER AND IN SOME INSTANCES RUB AGAINST EACH OTHER. MECHANIC SAID THAT CHEVROLET OFFERS A "KIT" CONTAINING ALL OF THE LINES EXCEPT FOR THE TWO LINES TO THE REAR WHEELS. THE LINES IN THIS KIT ARE EPOXY-COATED TO PREVENT FUTURE CORROSION. HOWEVER, DUE TO TIGHT QUARTERS AND CLOSE PROXIMITY TO THE OTHER BRAKE LINES, REPLACEMENT OF ALL OF THESE BRAKE LINES IS VERY DIFFICULT. THIS VEHICLE IS LOCATED IN VIRGINIA, WHICH WAS NOT ONE OF THE SALT STATES INDICATED IN A NOW-CLOSED RECALL (EA-11-001).
NHTSA ODI #10860711
213,090 miles · Apr 4, 2016
Electrical SystemEngine And Engine CoolingPower TrainCrashFire
TRANNY, ABS, COOLING SYSTEM, TAILGATE, ETC. I BOUGHT THE TRUCK 2003 DIDN'T EXCHANGE TITLE UNTIL LATER RECALL WHEN I FIRST BOUGHT IT UNDER 50,000 MILE WARRANTY. I FILE AN COMPLAIN RECALL REPAIR STILL HAVING SAME PROBLEM. SAD THING MY FATHER IS AN RETIRED EMPLOYEE IN DALLAS LOCATION. RESEARCHED THE RECALLS FROM PREVIOUSLY AND PRE…
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TRANNY, ABS, COOLING SYSTEM, TAILGATE, ETC. I BOUGHT THE TRUCK 2003 DIDN'T EXCHANGE TITLE UNTIL LATER RECALL WHEN I FIRST BOUGHT IT UNDER 50,000 MILE WARRANTY. I FILE AN COMPLAIN RECALL REPAIR STILL HAVING SAME PROBLEM. SAD THING MY FATHER IS AN RETIRED EMPLOYEE IN DALLAS LOCATION. RESEARCHED THE RECALLS FROM PREVIOUSLY AND PRESENT SAME RESULTS. THEY HAVE UNTIL 2 DAYS TO CONTACT ME @ [XXX] IN GOING TO THE WAREHOUSE AND RETURN THE VEHICLE TO THE OWNER, CFO, CEO WHOMEVER AND ASK FOR A FULL REFUND OR I'M FILING AN COMPLAINT AND SMALL CLAMS FOR 30 YRS WORTH. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10853201
200,000 miles · Mar 10, 2016
Power TrainFire
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING AT 50 MPH, THE VEHICLE EMITTED SMOKE. THE CONTACT STATED THERE WAS EXCESSIVE AMOUNTS OF TRANSMISSION FLUID UNDERNEATH THE VEHICLE. THE VEHICLE WAS TOWED TO THE RESIDENCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THE TRANSFER CAS…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING AT 50 MPH, THE VEHICLE EMITTED SMOKE. THE CONTACT STATED THERE WAS EXCESSIVE AMOUNTS OF TRANSMISSION FLUID UNDERNEATH THE VEHICLE. THE VEHICLE WAS TOWED TO THE RESIDENCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THE TRANSFER CASE WAS FRACTURED AROUND TRANSFER CASE HOUSING. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 200,000.
NHTSA ODI #10845934
124,000 miles · Jan 13, 2016
Service BrakesCrash
THE BREAK LINES ON MY 2001 CHEVY SILVERADO FAILED CAUSING ME TO HAVE TO REPLACE ALL OF THEM. THEY RUSTED THROUGH
NHTSA ODI #10819986
180,000 miles · Jan 5, 2016
Service BrakesCrash
AT SPEEDS LOWER THAN 5 MPH, ABS BRAKING SYSTEM ENGAGES ON DRY OR WET PAVEMENT RESULTING IN FAILURE TO STOP THE VEHICLE. EXAMPLE - PULLING INTO A PARKING SPOT THE VEHICLE WOULD NOT STOP AND RESULTED IN BUMPING INTO NEXT VEHICLE. ALSO AT A STOP SIGN/LIGHTED INTERSECTION, THE VEHICLE WOULD NOT STOP RESULTING IN VEHICLE GOING INTO T…
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AT SPEEDS LOWER THAN 5 MPH, ABS BRAKING SYSTEM ENGAGES ON DRY OR WET PAVEMENT RESULTING IN FAILURE TO STOP THE VEHICLE. EXAMPLE - PULLING INTO A PARKING SPOT THE VEHICLE WOULD NOT STOP AND RESULTED IN BUMPING INTO NEXT VEHICLE. ALSO AT A STOP SIGN/LIGHTED INTERSECTION, THE VEHICLE WOULD NOT STOP RESULTING IN VEHICLE GOING INTO THE INTERSECTION AND ONCOMING TRAFFIC.
NHTSA ODI #10817769
120,000 miles · Dec 9, 2015
Service BrakesVehicle Speed Control
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS, THE ABS WARNING LIGHT ILLUMINATED AND THE BRAKES FAILED TO ENGAGE. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN DIAGNOSED THAT THE DRIVER AND PASSENGER SIDE SPEED SENSORS AND THE ELECTRONIC BRAKE CONTROL MODULE WERE DEFECTIVE. THE MANUFACT…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. WHILE DRIVING VARIOUS SPEEDS, THE ABS WARNING LIGHT ILLUMINATED AND THE BRAKES FAILED TO ENGAGE. THE VEHICLE WAS TAKEN TO THE DEALER. THE TECHNICIAN DIAGNOSED THAT THE DRIVER AND PASSENGER SIDE SPEED SENSORS AND THE ELECTRONIC BRAKE CONTROL MODULE WERE DEFECTIVE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 120,000.
NHTSA ODI #10809325
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.
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