NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter92,806 miles · Apr 10, 2010
Service Brakes, Hydraulic
AT THE END OF SEPTEMBER 2008 I LOST THE USE OF MY BRAKES ON MY 2001 CHEVROLET SILVERADO. FORTUNATELY IT HAPPENED IN MY DRIVEWAY. I NOTICED A PUDDLE OF FLUID ON THE DRIVEWAY UNDER THE DRIVER SIDE DOOR, UPON INSPECTION THE BRAKE LINE WAS ALL RUSTED AND FULL OF HOLES. I HAD TO HAVE THE TRUCK TOWED AND THE BRAKE LINES REPLACED TO TH…
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AT THE END OF SEPTEMBER 2008 I LOST THE USE OF MY BRAKES ON MY 2001 CHEVROLET SILVERADO. FORTUNATELY IT HAPPENED IN MY DRIVEWAY. I NOTICED A PUDDLE OF FLUID ON THE DRIVEWAY UNDER THE DRIVER SIDE DOOR, UPON INSPECTION THE BRAKE LINE WAS ALL RUSTED AND FULL OF HOLES. I HAD TO HAVE THE TRUCK TOWED AND THE BRAKE LINES REPLACED TO THE TUNE OF $600.21 ON OCTOBER 1. I SAW IN TODAY'S NEWSPAPER AN INVESTIGATION WAS BEING CONDUCTED INTO THIS PROBLEM. YOU CAN ADD ME TO THIS LIST. *TR
NHTSA ODI #10324844
195,000 miles · Apr 10, 2010
Service Brakes, Hydraulic
I HAVE A 2001 CHEVROLET SILVERADO PICKUP WITH ANTILOCK BRAKING SYSTEM. THE ABS COMPUTER MODULE HAS FAILED TWICE SINCE I HAVE HAD IT. YOU CAN TELL IT IS NOT WORKING WHEN THE SYSTEM CONTINUALLY PUMPS THE BRAKES EVEN WHEN THE ENGINE IS TURNED OFF. THE MODULE COSTS $800-$1000 AND I CANNOT AFFORD TO REPLACE IT AGAIN. I CALLED C…
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I HAVE A 2001 CHEVROLET SILVERADO PICKUP WITH ANTILOCK BRAKING SYSTEM. THE ABS COMPUTER MODULE HAS FAILED TWICE SINCE I HAVE HAD IT. YOU CAN TELL IT IS NOT WORKING WHEN THE SYSTEM CONTINUALLY PUMPS THE BRAKES EVEN WHEN THE ENGINE IS TURNED OFF. THE MODULE COSTS $800-$1000 AND I CANNOT AFFORD TO REPLACE IT AGAIN. I CALLED CHEVROLET TO REPORT THE PROBLEM AND TOOK IT UP THEIR CHAIN OF COMPLAINTS AS FAR AS I COULD GET ANYONE TO LISTEN TO ME. THE BEST THEY WOULD OFFER AS A RESOLUTION WAS A COUPON FOR $500 OFF A NEW PICKUP TRUCK. I PULLED THE MODULE TO STOP THE CONTINUOUS PUMPING. AND MY DASHBOARD BRAKE WARNING LIGHT AND THE ABS WARNING LIGHTS STAY ON CONTINUALLY. MY BRAKES STILL FUNCTION, BUT THE ABS SAFETY SYSTEM DOES NOT AID THEM. I REPORTED THIS PROBLEM TO NTSB THE FIRST TIME THE MODULE FAILED AND GOT NO REPLY AND THIS IS THE SECOND MODULE TO FAIL ON THIS TRUCK. MY MECHANIC SAY HE DOES NOT UNDERSTAND WHY THERE HAS NOT BEEN A RECALL BECAUSE HE HAS SEEN THIS MANY TIMES ON 2001 SILVERADO. IT IS A SAFETY CONCERN BECAUSE ABS WON'T FUNCTION WITHOUT THE MODULE WORKING PROPERLY. *TR
NHTSA ODI #10324822
90,000 miles · Feb 19, 2010
Service Brakes, Hydraulic
IN 2005 A RECALL WAS ISSUED FOR CERTAIN MODELS OF THE CHEVROLET SILVERADO 1500. THIS RECALL WAS DIRECTLY RELATED TO THE ABS SPEED SENSORS. AT SLOW SPEEDS THE ABS SYSTEM WOULD ACTIVATE CAUSING EXTENDED STOPPING PERIODS. THIS PROBLEM OCCURS EACH AND EVERY TIME THE BRAKES ARE APPLIED. THE CONSEQUENCES ARE AN UNWANTED INCREASE IN ST…
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IN 2005 A RECALL WAS ISSUED FOR CERTAIN MODELS OF THE CHEVROLET SILVERADO 1500. THIS RECALL WAS DIRECTLY RELATED TO THE ABS SPEED SENSORS. AT SLOW SPEEDS THE ABS SYSTEM WOULD ACTIVATE CAUSING EXTENDED STOPPING PERIODS. THIS PROBLEM OCCURS EACH AND EVERY TIME THE BRAKES ARE APPLIED. THE CONSEQUENCES ARE AN UNWANTED INCREASE IN STOPPING DISTANCE WHICH CAN LEAD TO TRAGEDY. TO CORRECT THE PROBLEM DEALERS WERE INSTRUCTED TO REMOVE THE WHEEL SPEED SENSORS, CLEAN THE MOUNTING SURFACE, AND RE-INSTALL. NO PARTS WERE REPAIRED OR REPLACED. IN THIS CASE THE RECALL PROCESS WAS PERFORMED AT APPROXIMATELY 65,000 MILES AND THE PROBLEM RE-OCCURRED AT APPROXIMATELY 89,000 MILES. GENERAL MOTORS WAS CONTACTED AND UNWILLING TO ASSIST IN ANY WAY. THIS PROBLEM WAS NOT FIXED PROPERLY DURING THE RECALL. THE SOLUTION WAS ONLY A TEMPORARY FIX AND THE PROBLEM CONTINUES TO RE-OCCUR ENDANGERING THE SAFETY OF ALL MOTORISTS. *TR
NHTSA ODI #10312153
90,000 miles · Feb 19, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. WHENEVER THE CONTACT WOULD APPLY THE BRAKES AT A LOW SPEED THE ABS WHEEL SENSOR WOULD ACTIVATE INCREASING THE STOPPING DISTANCE OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT HAD THE FRONT ABS WHEEL SENSOR REPLACED. THERE WERE NO PRIOR WARNINGS. THE CURRE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. WHENEVER THE CONTACT WOULD APPLY THE BRAKES AT A LOW SPEED THE ABS WHEEL SENSOR WOULD ACTIVATE INCREASING THE STOPPING DISTANCE OF THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALERSHIP WHERE THE CONTACT HAD THE FRONT ABS WHEEL SENSOR REPLACED. THERE WERE NO PRIOR WARNINGS. THE CURRENT AND FAILURE MILEAGES WERE 90,000.
NHTSA ODI #10312142
84,000 miles · Feb 1, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT STATED THAT THE ABS WAS ACTIVATED WHILE DRIVING LOW SPEEDS TO INCLUDE 10 MPH. WHEN THE CONTACT ATTEMPTED TO STOP THE VEHICLE, IT FAILED TO STOP. THE DEALER ADVISED THE CONTACT THAT A RELATED RECALL WAS STATE SPECIFIC. THE CHEVROLET MANUFACTURER ALSO INFORMED THE CONTAC…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT STATED THAT THE ABS WAS ACTIVATED WHILE DRIVING LOW SPEEDS TO INCLUDE 10 MPH. WHEN THE CONTACT ATTEMPTED TO STOP THE VEHICLE, IT FAILED TO STOP. THE DEALER ADVISED THE CONTACT THAT A RELATED RECALL WAS STATE SPECIFIC. THE CHEVROLET MANUFACTURER ALSO INFORMED THE CONTACT THAT HE WOULD HAVE TO REPAIR THE VEHICLE AT HIS OWN EXPENSE. THE FAILURE MILEAGE WAS 84,000.
NHTSA ODI #10303693
75,000 miles · Feb 1, 2010
Service Brakes, Hydraulic
ABS ACTIVATES AT LOW SPEED, 5-10MPH, ON DRY PAVEMENT. THIS EXTENDS THE STOPPING DISTANCE. HAPPENS MORE THAN 50% OF THE TIME WHEN STOPPING. SAME CONDITION AS DESCRIBED IN CAMPAIGN NUMBER 05V379000. *TR
NHTSA ODI #10303626
68,000 miles · Dec 7, 2009
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET PICKUP C1500. WHILE DRIVING APPROXIMATELY 2 MPH INTO A PARKING LOT THE ANTI-LOCK BRAKING SYSTEM FAILED TO OPERATE NORMALLY. THE CONTACT HAD DIFFICULTY STOPPING THE VEHICLE WHEN THE BRAKES WERE APPLIED. THE CONTACT WAS UNABLE TO OVERRIDE THE ABS BY APPLYING EXTREME FORCE TO THE BRAKE PEDAL WHI…
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TL*THE CONTACT OWNS A 2001 CHEVROLET PICKUP C1500. WHILE DRIVING APPROXIMATELY 2 MPH INTO A PARKING LOT THE ANTI-LOCK BRAKING SYSTEM FAILED TO OPERATE NORMALLY. THE CONTACT HAD DIFFICULTY STOPPING THE VEHICLE WHEN THE BRAKES WERE APPLIED. THE CONTACT WAS UNABLE TO OVERRIDE THE ABS BY APPLYING EXTREME FORCE TO THE BRAKE PEDAL WHICH CAUSED THE VEHICLE TO DRIVE ONTO A CURB. THE CONTACT WAS FORCED TO SHUT THE ENGINE OFF TO RESET THE ANTI-LOCK BRAKING SYSTEM. THE FAILURE OCCURRED ON TWO OCCASIONS PRIOR TO BEING DIAGNOSED BY THE DEALER. THE DEALER DETERMINED THAT THE WHEEL SPEED SENSOR WAS CORRODED AND CHARGED HIM $200 TO CLEAN IT; HOWEVER, THE FAILURE COULD RECUR IF THE WHEEL SENSORS BECOME CORRODED. THE VEHICLE IS CURRENTLY OPERATING NORMALLY. THE FIRST FAILURE OCCURRED ON OCTOBER 17TH AND 18TH OF 2009. THE FAILURE MILEAGE WAS 68,000 AND THE CURRENT MILEAGE WAS APPROXIMATELY 69,000.
NHTSA ODI #10294691
99,000 miles · Dec 1, 2009
Service Brakes, Hydraulic
I HAVE A 2001 CHEVROLET SILVERADO, AND THE ANTI-LOCK BRAKES COME ON ALMOST ALL THE TIME WHEN I AM BRAKING AT ABOUT 5 MPH. THERE IS A RECALL FOR THIS PROBLEM, BUT CHEVROLET SAYS MY VIN NUMBER IS NOT INCLUDED IN THE RECALL. THE RECALL IS JUST FOR CERTAIN STATES, INDIANA (WHERE I LIVE) BEING ONE OF THEM. CHEVROLET DOES NOT WANT …
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I HAVE A 2001 CHEVROLET SILVERADO, AND THE ANTI-LOCK BRAKES COME ON ALMOST ALL THE TIME WHEN I AM BRAKING AT ABOUT 5 MPH. THERE IS A RECALL FOR THIS PROBLEM, BUT CHEVROLET SAYS MY VIN NUMBER IS NOT INCLUDED IN THE RECALL. THE RECALL IS JUST FOR CERTAIN STATES, INDIANA (WHERE I LIVE) BEING ONE OF THEM. CHEVROLET DOES NOT WANT TO FIX THE PROBLEM BECAUSE MY VIN NUMBER IS NOT ONE THAT IS COVERED UNDER THE RECALL. I HAVE READ SEVERAL OTHER COMPLAINTS ABOUT THE SAME THING, SO THERE MUST BE SOME KIND OF DEFECT. MY TRUCK STARTED HAVING THE PROBLEM AT ABOUT 99,000 MILES. *TR
NHTSA ODI #10294167
59,021 miles · Nov 25, 2009
Service Brakes, Hydraulic
ON A SATURDAY 11/21/2009 I WAS DRIVING MY 201 CHEVROLET SILVERADO {59,021 MILES} DOWN A DIRT INCLINE WHICH LEADS TO A POND.WHEN I APPLIED THE BRAKES ,THERE WERE NO BRAKES AT ALL, AND I KEEP GOING WHILE MY FOOT WAS HOLDING THE BRAKES DOWN , UNTIL MY TRUCK'S FRONT TIRES WERE IN THE PONDS WATER. AS I ENTERED THE WATER THE BRAKES F…
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ON A SATURDAY 11/21/2009 I WAS DRIVING MY 201 CHEVROLET SILVERADO {59,021 MILES} DOWN A DIRT INCLINE WHICH LEADS TO A POND.WHEN I APPLIED THE BRAKES ,THERE WERE NO BRAKES AT ALL, AND I KEEP GOING WHILE MY FOOT WAS HOLDING THE BRAKES DOWN , UNTIL MY TRUCK'S FRONT TIRES WERE IN THE PONDS WATER. AS I ENTERED THE WATER THE BRAKES FINALLY TOOK HOLD AND I STOPPED. IT WAS A BEAUTIFUL CLEAR DAY WITHOUT ANY ICE OR SNOW. THIS IS THE SECOND TIME IT HAS HAPPENED~ THE FIRST WAS ABOUT 11/2003 I WAS HAVING BRAKE PROBLEMS {THE BRAKES WOULD CHATTER WHEN APPLIED}SO I BROUGHT THE TRUCK TO A CHEVROLET DEALER TO CK. THE BRAKES THIS WAS ON 12/01/2003. THE SERVICE DEPARTMENT CALLED A FEW DAYS LATER AND SAID THE MECHANIC HAD A ACCIDENT WITH THE TRUCK, HE WAS BRING IT INTO THE GARAGE AND HE HAD GONE RIGHT THROUGH THE CLOSED GARAGE DOORS BECAUSE OF A BRAKE FAILURE. THE DEALER AT THIS POINT CALLED GENERAL MOTORS AND REPORTED THE PROBLEM WITH THE BRAKES {NOT STOPPING & GOING THROUGH THE CLOSED DOORS}DAMAGE WAS DONE AND THEY HAD TO REPLACE THE BUG DEFLECTOR,BUMPER CAP , FRONT GRILL & REPAIRED AND PAINTED THE HOOD. THEY ALSO REPLACED THE ~WHEEL SENSORS ~TELLING US THAT THIS WAS THE PROBLEM. WE HAD NO USE OF THE TRUCK FOR ABOUT 6WK. THE TRUCK WAS RETURNED TO US WITHOUT CHARGE. WERE AFRAID TO DRIVE THIS TRUCK NOW FEARING SOMEONE WILL BE INJURED OR KILLED BECAUSE WE ARE NEVER SURE WHEN THIS BRAKE FAILURE WILL HAPPEN AGAIN. WE HAVE CALLED GM THEY MADE AN APPOINTMENT WITH A CHEVROLET DEALER BUT THEY REFUSED TO PAY FOR THE DIAGNOSTIC TEST TO CONFIRM THE BRAKE FAILURE . *TR
NHTSA ODI #10293605
90,500 miles · Oct 13, 2009
Service Brakes, Hydraulic
SUDDEN AND NEAR TOTAL LOSE OF BRAKES. THE CHEVROLET DEALER REPORTED THAT THE BRAKE LINES HAD RUSTED OUT AND RUPTURED. ALL BRAKE LINES HAD TO BE REPLACED. IF THIS HAD OCCURRED AT HIGHWAY SPEEDS IN AN EMERGENCY SITUATION THERE COULD HAVE BEEN A VERY SERIOUS ACCIDENT. *TR
NHTSA ODI #10287191
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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