NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter117,703 miles · Aug 11, 2010
Service Brakes, Hydraulic
1. AT APPROXIMATELY 2 PM, CST ON AUGUST 10, 2010, I PULLED OUT OF MY DRIVEWAY AND BEGAN EXITING MY SUBDIVISION DOWN THE ONE LANE GRAVEL ROAD. I WAS TRAVELING AT APPROXIMATELY 15MPH, AND COMPRESSED THE BRAKES WHILE DRIVING DOWNHILL. 2. AFTER APPLYING THE BREAKS TO REDUCE MY SPEED WHILE TRAVELING DOWNHILL, THE BRAKE PEDAL COMPLE…
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1. AT APPROXIMATELY 2 PM, CST ON AUGUST 10, 2010, I PULLED OUT OF MY DRIVEWAY AND BEGAN EXITING MY SUBDIVISION DOWN THE ONE LANE GRAVEL ROAD. I WAS TRAVELING AT APPROXIMATELY 15MPH, AND COMPRESSED THE BRAKES WHILE DRIVING DOWNHILL. 2. AFTER APPLYING THE BREAKS TO REDUCE MY SPEED WHILE TRAVELING DOWNHILL, THE BRAKE PEDAL COMPLETELY DEPRESSED TO THE FLOOR, AND ALL FUNCTION TO THE BRAKES WAS LOST. I CONTINUED DOWNHILL WITH THE EMERGENCY BRAKE FULLY DEPRESSED, WHICH PROVIDED SOME DECELERATION, ALTHOUGH THE VEHICLE REMAINED IN MOTION, REACHING A SPEED OF ABOUT 20MPH BEFORE FINALLY COMING TO REST ON THE ONE LANE BRIDGE EXITING THE SUBDIVISION. A VISUAL INSPECTION REVEALED THAT THE BRAKE LINES WERE NEARLY COMPLETELY CORRODED, AND HAD RUPTURED, LEAKING BRAKE FLUID ONTO THE CHASSIS, AND PUDDLING ON THE GRAVEL. 3. I HAVE CONTACTED CHEVROLET CUSTOMER SERVICE, AND WAS TOLD THE VEHICLE MUST BE DIAGNOSED AT MY OWN EXPENSE BEFORE ASSISTANCE COULD BE PROVIDED. I PLAN TO HAVE THE VEHICLE DIAGNOSED FRIDAY, AUGUST 13, 2010. *TR
NHTSA ODI #10348869
103,000 miles · Aug 9, 2010
Service Brakes, Hydraulic
BRAKES FAILED WHILE DRIVING DOWN MY DRIVEWAY, AND THE PEDAL WENT ALMOST TO THE FLOOR. ALL FIVE LINES LEADING TO THE ABS UNIT LOCATED INSIDE THE FRAME RAIL, UNDER THE DRIVERS SEAT, ARE SEVERELY RUSTED AND WILL NEED TO BE REPLACED. ONE OF THE LINES RUSTED THROUGH AND SPRUNG A LEAK. SINCE THE LINES ARE RUNNING ALONG THE TOP SIDE…
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BRAKES FAILED WHILE DRIVING DOWN MY DRIVEWAY, AND THE PEDAL WENT ALMOST TO THE FLOOR. ALL FIVE LINES LEADING TO THE ABS UNIT LOCATED INSIDE THE FRAME RAIL, UNDER THE DRIVERS SEAT, ARE SEVERELY RUSTED AND WILL NEED TO BE REPLACED. ONE OF THE LINES RUSTED THROUGH AND SPRUNG A LEAK. SINCE THE LINES ARE RUNNING ALONG THE TOP SIDE OF THE FRAME RAIL FROM THE MASTER CYLINDER AND TO THE FRONT WHEELS, THE REPLACEMENT WILL BE A DIFFICULT JOB. TO THE BEST OF MY KNOWLEDGE, THE MANUFACTURER DOES NOT CARRY REPLACEMENT LINES AND THEY MUST BE CUSTOM BENT. SINCE THE LINES ARE TYPICALLY INSTALLED ON A BARE FRAME WITHOUT THE CHASSIS, THE ORIGINAL INSTALLATION IS MUCH EASIER THAN FIELD REPLACEMENT. GIVEN THE DIFFICULTY OF FIELD REPLACEMENT AND THE CONSEQUENCES OF BRAKE FAILURE, THE MANUFACTURER SHOULD USE A HIGHER QUALITY ORIGINAL PART. *TR
NHTSA ODI #10348083
56,489 miles · Jul 31, 2010
Service Brakes, Hydraulic
2001 CHEVY SILVERADO. ODOMETER 56K. 3/20/10 TOTAL BRAKE FAILURE. BRAKES, CALIPERS, FRONT TO REAR BRAKE LINES REPLACED. RUSTED LINES. 7/24/10 FOUR MONTHS AFTER, REPEATED BRAKE FAILURE. TOTALLY BLEW REAR BRAKES. CURRENTLY AT DEALERSHIP FOR SERVICE. AVOIDED A COLLISION. EXPENSIVE, AND POTENTIALLY DANGEROUS. NEEDS A SAFETY…
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2001 CHEVY SILVERADO. ODOMETER 56K. 3/20/10 TOTAL BRAKE FAILURE. BRAKES, CALIPERS, FRONT TO REAR BRAKE LINES REPLACED. RUSTED LINES. 7/24/10 FOUR MONTHS AFTER, REPEATED BRAKE FAILURE. TOTALLY BLEW REAR BRAKES. CURRENTLY AT DEALERSHIP FOR SERVICE. AVOIDED A COLLISION. EXPENSIVE, AND POTENTIALLY DANGEROUS. NEEDS A SAFETY RECALL ON THIS DEFECT. *TR
NHTSA ODI #10346519
60,000 miles · Jul 28, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE DRIVING AT VARIOUS SPEEDS, THE ANTI-LOCK BRAKING SYSTEM (ABS) WOULD INDEPENDENTLY ENGAGE. THE BRAKE AND ABS WARNING LIGHTS WOULD ALSO ILLUMINATE DURING THE FAILURE. THE CONTACT REMOVED THE ABS FUSE IN ORDER TO PREVENT IT FROM ENGAGING. HE ALSO LOCATED…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE DRIVING AT VARIOUS SPEEDS, THE ANTI-LOCK BRAKING SYSTEM (ABS) WOULD INDEPENDENTLY ENGAGE. THE BRAKE AND ABS WARNING LIGHTS WOULD ALSO ILLUMINATE DURING THE FAILURE. THE CONTACT REMOVED THE ABS FUSE IN ORDER TO PREVENT IT FROM ENGAGING. HE ALSO LOCATED A RECALL FOR THE FAILURE (NHTSA CAMPAIGN ID NUMBER: 05V379000: BRAKES HYDRAULIC ANTI LOCK) BUT THE MANUFACTURER ADVISED HIS VIN WAS NOT INCLUDED IN THE RECALL. THE MANUFACTURER DID NOT PROVIDE ANY FURTHER ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE VIN WAS NOT AVAILABLE. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 60,000.
NHTSA ODI #10345927
57,154 miles · Jun 1, 2010
Service Brakes, Hydraulic
BRAKE LINE RUPTURED. *TR
NHTSA ODI #10334104
Mileage unknown · May 20, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS EXPERIENCING BRAKE FAILURES AND THE VEHICLE WAS REPAIRED UNDER NHTSA RECALL CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK) WHERE THE DEALER CLEANED THE LEFT BRAKE SENSOR. THE FAILURE RECURRED AND THE VEHICLE WAS TAKEN BACK TO THE DEALER. TH…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS EXPERIENCING BRAKE FAILURES AND THE VEHICLE WAS REPAIRED UNDER NHTSA RECALL CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK) WHERE THE DEALER CLEANED THE LEFT BRAKE SENSOR. THE FAILURE RECURRED AND THE VEHICLE WAS TAKEN BACK TO THE DEALER. THE DEALER REPLACED THE RIGHT AND LEFT BRAKE SENSORS UNDER THE CONTACTS FACTORY WARRANTY. THE CONTACT BELIEVED THE RECALL REPAIR SHOULD HAVE CALLED FOR THE SENSORS TO BE REPLACED AND NOT CLEANED. THE FAILURE MILEAGE WAS NOT AVAILABLE AND THE CURRENT MILEAGE WAS 37,402.
NHTSA ODI #10331450
86,435 miles · May 13, 2010
Service Brakes, Hydraulic
SILVERADO BRAKING IS SOFT AND SOMETIMES APPEARS TO BE ENGAGE WITH FRONT END TRANSFER, THAT WHAT IT SOUNDS LIKE, IT COULD BE FAULTY SENSOR THAT ACTIVATES THE ABS SYSTEM. NOT SURE... *TR
NHTSA ODI #10330242
115,464 miles · May 5, 2010
Service Brakes, Hydraulic
SUDDEN LOSS OF BRAKES ON 2001 CHEVY SILVERADO 1500. ALL BRAKE LINES WERE BADLY RUSTED, FLUID WAS LEAKING FROM A GROUP OF LINES TO THE HCU. REMOVED ALL RUSTED BRAKE LINES AND BRAKE COMPONENTS. REPLACED 5 BRAKE LINES, CALIPER, BRAKE HOSE, & FLUID. COST = $ 1369.21. *TR
NHTSA ODI #10329062
94,000 miles · Apr 13, 2010
Service Brakes, Hydraulic
ABS FAILURE. I TURNED IN MY 01 1500 SILVERADO (94K MILES)BACK IN 07 FOR THE INITIAL BRAKE RECALL. THE DEALERSHIP CLEANED THE SENSOR AND I HAVEN'T HAD A PROBLEM TILL MARCH 2010. THE ABS IS NONE STOP NOW,IT WAS NOT A GRADUAL GROWING PROBLEM MY BRAKES JUST STOPPED WORKING. IF IM GOING ABOUT 10-20MPH AND DO NOT SLAM ON THE BRAKE…
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ABS FAILURE. I TURNED IN MY 01 1500 SILVERADO (94K MILES)BACK IN 07 FOR THE INITIAL BRAKE RECALL. THE DEALERSHIP CLEANED THE SENSOR AND I HAVEN'T HAD A PROBLEM TILL MARCH 2010. THE ABS IS NONE STOP NOW,IT WAS NOT A GRADUAL GROWING PROBLEM MY BRAKES JUST STOPPED WORKING. IF IM GOING ABOUT 10-20MPH AND DO NOT SLAM ON THE BRAKES THE ABS SETS OFF AND THE TRUCK JUST SLIDES TILL I PUMP THE BRAKES AND GET VEHICLE TO STOP. I HAVE USED A FEW CANS OF BRAKE CLEANER ON THE FRONT BRAKES AND IT SEEMS TO WORK FOR A WEEK OR TWO BUT THERE NEEDS TO BE A PERMANENT SOLUTION. *TR
NHTSA ODI #10325565
172,400 miles · Apr 12, 2010
Service Brakes, Hydraulic
BRAKE LINES FAILED ON MY 2001 CHEVY SILVERADO. MY SON WAS DRIVING, BUT WAS ABLE TO STOP OK WITH THE BRAKE PEDAL TO THE FLOOR. I HAD TO HAVE ALL THE BRAKE LINES REPLACED AS THEY WERE RUSTED TOO BADLY TO REPAIR. THIS COST ME A LOT OF MONEY AND THANKFULLY NO ONE WAS INJURED. *TR
NHTSA ODI #10325011
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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