NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
509 reports82,472 miles · Aug 12, 2012
Service BrakesStructure
I WAS DRIVING WHEN I WENT TO STOP AND THE PEDAL WAS SOFT. THE TRUCK STILL STOPPED BUT THE PEDAL DIDN'T FEEL RIGHT. I WAS ABLE TO GET TO MY IN-LAWS HOUSE,ABOUT 2 MILES. WHEN I GOT OUT I SAW BRAKE FLUID LEAKING FROM THE BRAKE LINES RUNNING ALONG THE FRAME ON THE DRIVERS SIDE. THEY ARE THE LINES THAT GO TO THE ABS MODULE. WHEN I IN…
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I WAS DRIVING WHEN I WENT TO STOP AND THE PEDAL WAS SOFT. THE TRUCK STILL STOPPED BUT THE PEDAL DIDN'T FEEL RIGHT. I WAS ABLE TO GET TO MY IN-LAWS HOUSE,ABOUT 2 MILES. WHEN I GOT OUT I SAW BRAKE FLUID LEAKING FROM THE BRAKE LINES RUNNING ALONG THE FRAME ON THE DRIVERS SIDE. THEY ARE THE LINES THAT GO TO THE ABS MODULE. WHEN I INSPECTED FURTHER, ALL 4 LINES WERE EITHER LEAKING OR ABOUT TO. THAT IS WHEN I NOTICED BOTH ROCKER PANELS, JUST UNDER THE DOORS, WERE RUSTED AND THE PASSENGER SIDE RUSTED THROUGH. THE DOORS ARE NOT RUSTED AND THERE IS VERY LITTLE RUST ON THE TRUCK EVEN WHERE THE PAINT HAS FLAKED OFF. *TR
NHTSA ODI #10470310
53,110 miles · Aug 1, 2012
Service Brakes
WITH ENGINE ON AND GOING AT APPROXIMATELY 45 MPH, AN 'ABS SYSTEM' WARNING LIGHT CAME OFF ALONG WITH A CONTINUOUS MOTOR TYPE SOUND. I PARKED THE CAR ON SIDE ROAD AND LOUD 'MOTOR' TYPE NOISE CONTINUED COMING UNDERNEATH THE CAR. I DROVE THE CAR BACK HOME AND ABS SYSTEM LIGHT ON WITH CONTINUOUS SOUND DID NOT STOP. TURNED ENGINE O…
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WITH ENGINE ON AND GOING AT APPROXIMATELY 45 MPH, AN 'ABS SYSTEM' WARNING LIGHT CAME OFF ALONG WITH A CONTINUOUS MOTOR TYPE SOUND. I PARKED THE CAR ON SIDE ROAD AND LOUD 'MOTOR' TYPE NOISE CONTINUED COMING UNDERNEATH THE CAR. I DROVE THE CAR BACK HOME AND ABS SYSTEM LIGHT ON WITH CONTINUOUS SOUND DID NOT STOP. TURNED ENGINE OFF AND THE SOUND DID NOT STOP. AFTER A COUPLE OF HOURS, THE SOUND DID NOT STOP AND HAD TO DISCONNECT CAR BATTERY. TOOK CAR INTO CAR DEALERSHIP AND RIGHT AWAY BEFORE CAR WAS FORMALLY TESTED/DIAGNOSED, THE SERVICE ADVISOR STATED HE KNEW EXACTLY WHAT THE ISSUE WAS. THE CAR WAS DIAGNOSED AND SERVICE ADVISOR CONFIRMED THE CAR HAD A 'KNOWN' PROBLEM RELATED TO ABCM (ABS CONTROL MODULE). ACCORDING TO THE SERVICE ADVISOR THIS IS A POTENTIAL SAFETY RELATED PROBLEM. THIS IS THE REASON WHY I AM SUBMITTING THIS SAFETY COMPLAINT. ACCORDING TO THE SERVICE ADVISOR, DAMAGED ABCM COMPUTER CAN SEND AN INCORRECT SIGNAL AND THE BREAKS CAN CLOSE WHEN THE CAR IS RUNNING. I CONTACTED CHEVROLET CORPORATE AND EXPLAINED THE SITUATION (SERVICE REQ # 71-1092953268). I WAS INFORMED THERE ARE NO RECALLS FOR THIS TYPE OF PROBLEMS. I DID A QUICK SEARCH IN THE INTERNET AND FOUND THAT MANY CONSUMERS ARE COMPLAINING ABOUT THE SAME PROBLEM. ALSO NOTED THAT THE PROBLEM DOES NOT SEEM TO BE RELATED ONLY TO 2002 CHEVY TRUCKS, BUT OTHER CAR MODELS AND YEARS. IF THE CARDEALER SERVICE MANAGER IS CORRECT AND THIS IS A SAFETY RELATED PROBLEM, THEN THIS ISSUE COULD CAUSE SERIOUS INCIDENTS. CAN NHTSA PLEASE LOOK INTO THIS PROBLEM AND CONFIRM IF THIS IS A POTENTIAL SAFETY PROBLEM? THANKS IN ADVANCE FOR YOUR HELP. *TR
NHTSA ODI #10468810
68,000 miles · Jul 28, 2012
Service Brakes
WHILE BACKING MY TRUCK OUT OF THE GARAGE I LOST MY BRAKES DUE TO PEDAL GOING TO FLOOR AND LOOSING BRAKE FLUID. I WAS ABLE TO GET IT TO STOP WITH EMERGENCY BRAKE. UPON FURTHER INVESTIGATION I NOTICED ALL BRAKE LINES THAT ROUTE ON OUTSIDE OF FRAME BETWEEN MASTER CYLINDER AND ABS MODULE WERE RUSTED BADLY AND WERE WET WITH BRAKE FLU…
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WHILE BACKING MY TRUCK OUT OF THE GARAGE I LOST MY BRAKES DUE TO PEDAL GOING TO FLOOR AND LOOSING BRAKE FLUID. I WAS ABLE TO GET IT TO STOP WITH EMERGENCY BRAKE. UPON FURTHER INVESTIGATION I NOTICED ALL BRAKE LINES THAT ROUTE ON OUTSIDE OF FRAME BETWEEN MASTER CYLINDER AND ABS MODULE WERE RUSTED BADLY AND WERE WET WITH BRAKE FLUID. *TR
NHTSA ODI #10468085
57,856 miles · Jul 23, 2012
Power TrainService Brakes, Hydraulic
I WENT TO STOP AT STREET LIGHT AND THE BRAKE WENT TO THE FLOOR NO BRAKES AT ALL. LATER FOUND BRAKES LINES RUSTED THREW. ALL TRANSMISSION LINES ALSO RUST THREW. PRICE TO HAVE FIXED OVER $2000.00 *TR
NHTSA ODI #10467487
93,000 miles · Jul 15, 2012
Service Brakes
HAD TO MAKE A PANIC STOP AT A SPEED OF 50 MPH....NOT A FULL BRAKING PANIC STOP BUT A MINOR PANIC STOP WHEN THE BRAKE PEDAL WENT TO THE FLOOR. DROVE 3 MILES TO HOME (VERY CAREFULLY) ......SERVICE GARAGE SAID I HAD BLOWN A BRAKE LINE DUE TO RUST, AND ALL LINES WERE COMPLETELY RUSTED. COST TO REPLACE ALL LINES, $950.00. *TR
NHTSA ODI #10465734
Mileage unknown · Jul 14, 2012
Service BrakesStructureVisibility
I WAS DRIVING DOWN LOCAL ROAD, WHEN THERE WAS A THREE CAR ACCIDENT WAY AHEAD. I SOWED RIGHT DOWN, MAY 25-30 MPH AS WE CAME UP ON IT, REALIZING AS I WENT TO SLOW DOWN MORE, MY BRAKE PEDAL WENT TO FLOOR. I MADE IT HOME AND PARKED. MY BOYFRIEND LOOKED AT IT NEXT MORNING, I HAD NO BRAKE FLUID LEFT, ONE OF THE LINES WAS SO CORRODED …
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I WAS DRIVING DOWN LOCAL ROAD, WHEN THERE WAS A THREE CAR ACCIDENT WAY AHEAD. I SOWED RIGHT DOWN, MAY 25-30 MPH AS WE CAME UP ON IT, REALIZING AS I WENT TO SLOW DOWN MORE, MY BRAKE PEDAL WENT TO FLOOR. I MADE IT HOME AND PARKED. MY BOYFRIEND LOOKED AT IT NEXT MORNING, I HAD NO BRAKE FLUID LEFT, ONE OF THE LINES WAS SO CORRODED THE FLUID LEAKED ALL OVER THE DRIVEWAY. I HAD RECENTLY HAD MY BRAKES DONE AND INSPECTION WITHIN THE PAST MONTH. I BOUGHT THE TRUCK BRAND NEW, AND HAVE HAD A LOT OF ISSUES WITH IT. INCLUDING ABS THAT WAS PREVIOUSLY RECALLED, AND NEVER WORKED AFTER IT WAS REPLACED, WHICH I DID COMPLAIN ABOUT, HE INTERIOR SET MATERIAL NEEDED REPLACING, THE TAIL GATE CABLES AND HINGES ARE BROKE, THE DEALER SAYS THERE IS NO RECALL ON THEM. A SENSOR WENT IN GAS TANK, THE DRIVERS SIDE MIRROR FELL OFF, THE WINDOW CABLE ON DRIVERS SIDE HAS BEEN REPLACED TWICE, PASSENGER SIDE ONCE, THE LIST GOES ON AND ON. LIKE I SAID, I BOUGHT IT BRAND NEW OFF THE LOT, TRADED IN OLDER CHEVY SILVERADO, PAID CASH WITH GM DISCOUNT. I LOVE MY TRUCK, BUT THINK IT HAS HAD WAY TOO MANY PROBLEMS. I HAVE DEFINITELY READ A LOT OF COMPLAINTS ON THE CORRODED GAS LINES AMONG OTHER ISSUES AND WOULD HOPE CHEVY WOULD STAND BEHIND THEIR PRODUCTS. *TR
NHTSA ODI #10465646
65,000 miles · Jul 8, 2012
Service Brakes
I HAD COMPLETE BRAKE FAILURE WITH NO WARNING , BRAKE LINE IS RUSTED. AND HAD TO USE EMERGENCY BRAKE TO STOP.WAS A NIGHTMARE. *TR
NHTSA ODI #10464616
44,000 miles · Jul 5, 2012
Service Brakes
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE VEHICLE WAS TAKEN FOR STATE INSPECTION WHEN THE CONTACT WAS INFORMED THAT ALL OF THE BRAKE LINES WERE CORRODED AND WOULD HAVE TO BE REPLACED. THERE WAS AN INVESTIGATION UNDER NHTSA ACTION NUMBER: EA11001 (SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE VEHICLE WAS TAKEN FOR STATE INSPECTION WHEN THE CONTACT WAS INFORMED THAT ALL OF THE BRAKE LINES WERE CORRODED AND WOULD HAVE TO BE REPLACED. THERE WAS AN INVESTIGATION UNDER NHTSA ACTION NUMBER: EA11001 (SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS) THAT COULD HAVE BEEN RELATED TO THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 44,000.
NHTSA ODI #10464339
55,000 miles · Jul 2, 2012
Service Brakes
THE VEHICLES BRAKES FAILED WHILE APPROACHING A STOP SIGN (I WAS LUCKY THERE WAS NO ACCIDENT OR INJURY). THE VEHICLE WAS TOWED AND THE MECHANIC REPORTED CATASTROPIC FAILURE OF THE BRAKE LINES (RUSTED THROUGH CAUSING COMPLETE LOSS OF FLUID). *JS
NHTSA ODI #10463942
133,000 miles · Jun 25, 2012
Service Brakes
THANK GOODNESS I JUST GOT OFF A MAJOR ROADWAY IN TOWN. MY 16 YEAR OLD SON WAS DRIVING THE VEHICLE. WE GOT HOME AND I HAD TO RUN BACK OUT. I WAS DRIVING AT THE TIME. PULLED OUT OF MY CUL-DE-SAC AND WENT TO APPLY THE BRAKES AT THE STOP SIGN AND THE PEDAL WENT TO THE FLOOR. LUCKY NO CARS OR CHILDREN WERE IN MY PATH. ALL LINES ARE R…
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THANK GOODNESS I JUST GOT OFF A MAJOR ROADWAY IN TOWN. MY 16 YEAR OLD SON WAS DRIVING THE VEHICLE. WE GOT HOME AND I HAD TO RUN BACK OUT. I WAS DRIVING AT THE TIME. PULLED OUT OF MY CUL-DE-SAC AND WENT TO APPLY THE BRAKES AT THE STOP SIGN AND THE PEDAL WENT TO THE FLOOR. LUCKY NO CARS OR CHILDREN WERE IN MY PATH. ALL LINES ARE RUSTED OUT. HAD TWO SECTIONS (FRONT) WITH MAJOR ROT THAT WERE LEAKING. NO INDICATOR LIGHTS OR SIGNS PRIOR TO MALFUNCTION. BOUGHT NEW LINES FROM LOCAL AUTO PARTS STORE AND HAVE BEEN REPLACING A LITTLE AT A TIME. ENTIRE UNDERSIDE OF TRUCK LOOKS LIKE ITS 50 YEARS OLD!!!! WILL SEE WHAT ROTS OUT NEXT. *TR
NHTSA ODI #10462964
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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