NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
468 reports84,000 miles · Jul 27, 2014
Service Brakes
I LEFT MY PARKING AND THE BRAKE LIGHT CAME ON IN THE DASH. I NOTICED A VERY SPONGY FEEL SO PULLED OVER AND FOUND THAT HALF OF MY FLUID WAS MISSING. I INSPECTED UNDER THE VEHICLE AND NOTICED THAT ALL THE BRAKE LINES WERE EXTREMELY CORRODED, EVEN IN THE ENGINE COMPARTMENT. BASED ON THIS INSPECTION, DESPITE NOT BEING ABLE TO FIND A…
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I LEFT MY PARKING AND THE BRAKE LIGHT CAME ON IN THE DASH. I NOTICED A VERY SPONGY FEEL SO PULLED OVER AND FOUND THAT HALF OF MY FLUID WAS MISSING. I INSPECTED UNDER THE VEHICLE AND NOTICED THAT ALL THE BRAKE LINES WERE EXTREMELY CORRODED, EVEN IN THE ENGINE COMPARTMENT. BASED ON THIS INSPECTION, DESPITE NOT BEING ABLE TO FIND A "SMOKING GUN" LEAK, IT IS VERY APPARENT THAT THE CORRODED BRAKE LINES ARE THE CAUSE OF THE LEAK. FORTUNATELY, I WAS ABLE TO PULL OVER WITH BRAKE FLUID STILL LEFT IN THE SYSTEM. IT IS RIDICULOUS THAT SUCH A CRITICAL SAFETY ITEM (BRAKES) SHOULD HAVE A CORROSION PROBLEM TO THE DEGREE THAT THIS DOES. *JS
NHTSA ODI #10616609
20,100 miles · Jul 18, 2014
Service BrakesService Brakes, Air
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE WHEEL SPEED SENSOR AND THE ABS SENSOR ILLUMINATED INTERMITTENTLY. THE CONTACT APPLIED THE BRAKE PEDAL AND THE VEHICLE JERKED FORWARD AS THE BRAKE PEDAL WAS APPLIED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIR…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE WHEEL SPEED SENSOR AND THE ABS SENSOR ILLUMINATED INTERMITTENTLY. THE CONTACT APPLIED THE BRAKE PEDAL AND THE VEHICLE JERKED FORWARD AS THE BRAKE PEDAL WAS APPLIED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 20,100.
NHTSA ODI #10614545
120,000 miles · Jul 17, 2014
Electronic Stability Control (esc)EngineSeat Belts
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
NHTSA ODI #10611266
188,000 miles · Jul 16, 2014
Fuel System, GasolineService BrakesStructureCrash
I HAD AN ACCIDENT AT LOW SPEED BECAUSE OF UNWANTED (ABS) BRAKES ACTIVATION. I CONTINUE TO HAVE PROBLEMS AS I STOP AT LOW SPEED MY TRUCK MOVES FORWARD AGAIN AFTER THE STOP CAUSING A POSSIBLE ACCIDENT. I BOUGHT MY TRUCK IN FLORIDA. FOR THIS REASON MY VIN NUMBER IS NOT ON A RECALL LIST DUE TO THE FACT I PURCHASED IN A NON CORROSIV…
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I HAD AN ACCIDENT AT LOW SPEED BECAUSE OF UNWANTED (ABS) BRAKES ACTIVATION. I CONTINUE TO HAVE PROBLEMS AS I STOP AT LOW SPEED MY TRUCK MOVES FORWARD AGAIN AFTER THE STOP CAUSING A POSSIBLE ACCIDENT. I BOUGHT MY TRUCK IN FLORIDA. FOR THIS REASON MY VIN NUMBER IS NOT ON A RECALL LIST DUE TO THE FACT I PURCHASED IN A NON CORROSIVE STATE. I HAD TO COME TO OHIO QUITE OFTEN TO CARE FOR MY ILL MOTHER STARTING IN 2009. I ALSO HAVE EXPERIENCED PROBLEMS WITH THE SENSORS RECALLED, THE TAILGATE RECALLED(ACTUALLY FELL OFF THE TRUCK 3 TIMES WHILE I WAS ENROUTE), THE FUEL TANK PRESSURE SENSOR RECALL( NOT LETTING ME KNOW WHETHER I HAD GAS OR NOT), THE SEATS RECALL. ALL OF THIS DUE TO FAULTY PARTS CORRODING, AFTER I CAME TO OHIO, WHICH IS INCLUDED IN THE RECALL. I NEED MY VIN NUMBER ADDED TO THE RECALL SO I CAN HAVE THESE THINGS REPLACED BY A DEALER. I CANNOT DRIVE MY TRUCK NOW BECAUSE IT ISN'T SAFE. I HAVE TO TRANSPORT MY LITTLE GRAND CHILDREN AND ITS THE ONLY TRANSPORTATION I HAVE. *TR
NHTSA ODI #10611143
116,500 miles · Jul 16, 2014
Service BrakesCrash
EVEN AFTER THE RECALL WAS PERFORMED FOR THE LOW SPEED ABS ACTIVATION THE ABS IS ACTIVATING AGAIN. THIS TIME CAUSING ME TO RUN INTO A CONCRETE WALL. I CONTACTED THE DEALER AND THEY SAID THE RECALL WAS DONE BACK IN 2009. OBVIOUSLY THAT DID NOT FIX THE PROBLEMS. *TR
NHTSA ODI #10610986
100,000 miles · Jul 11, 2014
Service Brakes
BRAKE LINES RUPTURED ON REAR AXLE DUE TO EXTERNAL CORROSION CAUSING TOTAL LOSS OF BRAKING. STEERED VEHICLE TO SIDE OF ROAD AND COASTED TO STOP. *TR
NHTSA ODI #10609869
135,000 miles · Jul 9, 2014
Service BrakesService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE LINES HAD EXTENSIVE RUST TO THE POINT OF CORROSION. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER, WHO DIAGNOSED THAT THE BRAKE LINES NEEDED TO BE REPLACED. THE VEHICLE WAS NO REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPRO…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE LINES HAD EXTENSIVE RUST TO THE POINT OF CORROSION. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER, WHO DIAGNOSED THAT THE BRAKE LINES NEEDED TO BE REPLACED. THE VEHICLE WAS NO REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 135,000. ...UPDATED 09-05-14 *BF UPDATED 3/30/2015 *JS
NHTSA ODI #10609252
65,000 miles · Jul 8, 2014
Service Brakes
WHEN BACKING OUT OF DRIVE WAY BRAKES FAILED, I WAS LUCKING NO CAR WERE COMING ON THE ROAD I BACKED ONTO. AFTER GETTING IT STOPPED I PULLED BACK IN DRIVE WAY AND CHECKED IT OUT. THE BRAKE LINE GOING TO THE BACK BRAKES HAD A HOLE IN IT. I HAD THIS HAPPEN TO ME IN SEPT 2013 ON ANOTHER BRAKE LINE. *JS
NHTSA ODI #10609056
88,965 miles · Jul 8, 2014
Service Brakes
DURING DECELERATION THE BRAKE PEDAL EXHIBITED LITTLE PRESSURE AND TRAVELED TO THE FLOOR. BRAKING ABILITY WAS SEVERELY COMPROMISED BUT THE VEHICLE CAME TO A STOP. INSPECTION OF THE UNDERCARRIAGE REVEALED A SEVERELY CORRODED BRAKE LINE LOCATED JUST AFT OF THE CAB WHICH HAD RUPTURED AND RELEASED A SIGNIFICANT AMOUNT OF BRAKE FLUI…
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DURING DECELERATION THE BRAKE PEDAL EXHIBITED LITTLE PRESSURE AND TRAVELED TO THE FLOOR. BRAKING ABILITY WAS SEVERELY COMPROMISED BUT THE VEHICLE CAME TO A STOP. INSPECTION OF THE UNDERCARRIAGE REVEALED A SEVERELY CORRODED BRAKE LINE LOCATED JUST AFT OF THE CAB WHICH HAD RUPTURED AND RELEASED A SIGNIFICANT AMOUNT OF BRAKE FLUID. *JS
NHTSA ODI #10608830
69,500 miles · Jul 1, 2014
Service Brakes
MY TRUCK WAS PARKED AND WHEN I STARTED IT UP THE BRAKE PEDAL WENT STRAIGHT TO THE FLOOR WITHOUT STOPPING. I STEPPED OUT OF MY VEHICLE AND THERE WAS A POOL OF BRAKE FLUID ON THE GROUND. THE MECHANIC HAD TO REPLACE ALL THE BRAKE LINES DUE TO THEM ALL BEING BADLY CORRODED. *TR
NHTSA ODI #10607583
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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