NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter105,000 miles · Sep 18, 2010
Service Brakes, HydraulicCrash
PURCHASED 2000 SILVERADO NEW IN FALL OF 2000. ON 8/30/10 DRIVING SOUTH ON MERRITT PKY (CT) BRINGING DAUGHTER TO COLLEGE APPLIED BRAKES, VEHICLE STARTED TO SLOW DOWN AND SUDDENLY FOOT WENT TO FLOOR AND ABSOLUTELY NO MORE BRAKES. HIT CAR IN FRONT WHICH HIT TWO OTHER VEHICLES. PUT ON EMERGENCY BRAKE AND STEERED INTO GUARDRAIL TO ST…
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PURCHASED 2000 SILVERADO NEW IN FALL OF 2000. ON 8/30/10 DRIVING SOUTH ON MERRITT PKY (CT) BRINGING DAUGHTER TO COLLEGE APPLIED BRAKES, VEHICLE STARTED TO SLOW DOWN AND SUDDENLY FOOT WENT TO FLOOR AND ABSOLUTELY NO MORE BRAKES. HIT CAR IN FRONT WHICH HIT TWO OTHER VEHICLES. PUT ON EMERGENCY BRAKE AND STEERED INTO GUARDRAIL TO STOP THE MOVING TRUCK. UNBELIEVABLY FRIGHTENING EXPERIENCE, FOUR VEHICLES INVOLVED INCLUDING OURS. TRUCK WAS TOTALED. WE ALWAYS LOVED THE VEHICLE AND FELT SECURE WHEN DRIVING IT NOW JUST THE THOUGHT OF BEING IN ANY VEHICLE AND NOT STOPPING IS A VERY REAL FEAR. STATE POLICE OFFICER DID NOT CITE US SAID IT WAS MECHANICAL FAILURE "BLEW A LINE". THERE VERY WELL COULD HAVE BEEN SERIOUS INJURIES/FATALITIES CAUSED BY THIS MECHANICAL FAILURE, WE WERE ALL FORTUNATE ONLY PROPERTY DAMAGE. PHOTOS WERE TAKEN AND SILVERADO WAS TOTALED. INSURANCE RATES WILL GO SKY HIGH NOW WITH SURCHARGE. CAN WE SUE GM? WE HAVE POLICE REPORT. *TR
NHTSA ODI #10356293
103,000 miles · Sep 3, 2010
Service Brakes, Hydraulic
BRAKE LINE RUPTURE DUE TO CORROSION. VEHICLE BRAKE PEDAL WENT RIGHT TO THE FLOOR. *TR
NHTSA ODI #10353699
87,758 miles · Aug 31, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE LINES WERE SEVERELY RUSTED THROUGH THE REAR AND FRONT METAL BRAKE LINES. THE MANUFACTURER WAS CONTACTED AND ADVISED HIM TO TAKE THE VEHICLE TO THE DEALER TO HAVE THE BRAKES INSPECTED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 87,7…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKE LINES WERE SEVERELY RUSTED THROUGH THE REAR AND FRONT METAL BRAKE LINES. THE MANUFACTURER WAS CONTACTED AND ADVISED HIM TO TAKE THE VEHICLE TO THE DEALER TO HAVE THE BRAKES INSPECTED. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 87,758. UPDATED 11/16/10 * UPDATED 11/23/10*JB
NHTSA ODI #10352922
104,000 miles · Aug 23, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS BRAKING FROM 45 MPH YET THE BRAKES WOULD NOT ENGAGE. THE CONTACT WAS TRAVELING UPHILL AND WAS ABLE TO COAST TO A STOP. THE VEHICLE WAS THEN TOWED TO HIS RESIDENCE WHERE HE DISCOVERED THAT THE BRAKE LINES WERE RUSTED PREMATURELY. THE DEALER WAS CONTACTED AND TH…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS BRAKING FROM 45 MPH YET THE BRAKES WOULD NOT ENGAGE. THE CONTACT WAS TRAVELING UPHILL AND WAS ABLE TO COAST TO A STOP. THE VEHICLE WAS THEN TOWED TO HIS RESIDENCE WHERE HE DISCOVERED THAT THE BRAKE LINES WERE RUSTED PREMATURELY. THE DEALER WAS CONTACTED AND THEY ADVISED THAT THEY WERE AWARE OF THE FAILURE. THE DEALER WAS ABLE TO ORDER THE PART NEEDED TO MAKE REPAIRS HOWEVER, THE CONTACT STATED HE WOULD REPAIR THE VEHICLE HIMSELF ONCE THE PART BECAME AVAILABLE. THE FAILURE AND CURRENT MILEAGE WAS 104,000. UPDATED 12/22/10 *BF THE CONSUMER STATED THE BRAKE LINE RUPTURED DUE TO RUST. UPDATED 12/30/10
NHTSA ODI #10351258
103,000 miles · Aug 18, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS ENTERING A RESIDENTIAL GARAGE AT 2 MPH WITH THE BRAKES DEPRESSED WHEN THE BRAKE PEDAL FELL MUCH FURTHER INTO THE FLOORBOARD THAN USUAL. THE VEHICLE DID NOT STOP AND THE CONTACT HAD TO ENGAGE THE EMERGENCY BRAKE TO STOP THE VEHICLE. THE CONTACT DISCOVERED THAT …
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS ENTERING A RESIDENTIAL GARAGE AT 2 MPH WITH THE BRAKES DEPRESSED WHEN THE BRAKE PEDAL FELL MUCH FURTHER INTO THE FLOORBOARD THAN USUAL. THE VEHICLE DID NOT STOP AND THE CONTACT HAD TO ENGAGE THE EMERGENCY BRAKE TO STOP THE VEHICLE. THE CONTACT DISCOVERED THAT THE BRAKE LINE WAS CORRODED AND RUSTED. IN ADDITION, BRAKE FLUID WAS LEAKING FROM A HOLE IN THE BRAKE LINE. THE DEALER ADVISED THAT THE ENTIRE BRAKE LINE WOULD NEED REPLACING. THE MANUFACTURER ADVISED THE VEHICLE WAS NOT UNDER RECALL AND WOULD NOT PROVIDE ANY ASSISTANCE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 103,000.
NHTSA ODI #10350351
120,975 miles · Aug 13, 2010
Service Brakes, Hydraulic
I APPLIED THE BRAKES TO STOP MY TRUCK WHEN APPROACHING A STOP SIGN AND MY BRAKE PEDAL WENT TO THE FLOOR. I COASTED INTO THE INTERSECTION AND STOPPED. LUCKILY THERE WAS NO TRAFFIC. THE VEHICLE WAS EVENTUALLY TOWED TO THE DEALER AND THE SUPPLY LINE TO THE REAR BRAKES WAS REPLACED. IT HAD FAILED DUE TO RUST. *TR
NHTSA ODI #10349193
93,733 miles · Aug 6, 2010
Service Brakes, Hydraulic
PRESSED BRAKE TO PUT INTO GEAR. BRAKE WENT TO THE FLOOR. NO PRESSURE. HEAR FLUID COMING OUT FROM UNDER DRIVER SIDE DOOR UNDERCARRIAGE. PRESSED FOOT BRAKE AGAIN. SAME THING. FLUID COMING OUT. NO PRESSURE. CHECKED. BRAKE FLUID LEAK FROM RUSTED BRAKE LINES. VERY BAD RUST. VERY DANGEROUS. BRAKE LINES SHOULD NOT RUST LIKE THAT. ONE O…
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PRESSED BRAKE TO PUT INTO GEAR. BRAKE WENT TO THE FLOOR. NO PRESSURE. HEAR FLUID COMING OUT FROM UNDER DRIVER SIDE DOOR UNDERCARRIAGE. PRESSED FOOT BRAKE AGAIN. SAME THING. FLUID COMING OUT. NO PRESSURE. CHECKED. BRAKE FLUID LEAK FROM RUSTED BRAKE LINES. VERY BAD RUST. VERY DANGEROUS. BRAKE LINES SHOULD NOT RUST LIKE THAT. ONE OF THE MOST IMPORTANT PART IN A CAR IS THE BRAKES. THIS IS A SEVERE SAFETY HAZARD. I WORK IN THE QUALITY DEPARTMENT FOR A MAJOR US DEFENSE CONTRACTOR AND THIS WOULD NOT PASS STANDARDS. MAJOR FAILURE. GOOD THING MY DAUGHTER AND ME WERE STILL PARKED. I LIVE ON A VERY STEEP HILL AND THAT WOULD HAVE BEEN VERY BAD IF I DIDN'T NOTICE PROBLEM. *TR
NHTSA ODI #10347841
85,000 miles · Jul 27, 2010
Parking BrakeService Brakes, Hydraulic
2000 CHEVROLET SILVERADO 2 WHEEL DRIVE EXTENDED CAB WITH 85000 MILES CRAWLING THROUGH RUSH HOUR TRAFFIC, SOMEONE CUT ME OFF. I STEPPED ON THE BRAKES AND THE PEDAL WENT SLOWLY TO THE FLOOR. I TRIED "PUMPING THE PEDAL" TO NO EFFECT. I TRIED THE EMERGENCY BRAKE. IT DID NOT HOLD THE CAR. I PULLED OFF THE ROAD. SLOWED DOWN BY DOWN …
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2000 CHEVROLET SILVERADO 2 WHEEL DRIVE EXTENDED CAB WITH 85000 MILES CRAWLING THROUGH RUSH HOUR TRAFFIC, SOMEONE CUT ME OFF. I STEPPED ON THE BRAKES AND THE PEDAL WENT SLOWLY TO THE FLOOR. I TRIED "PUMPING THE PEDAL" TO NO EFFECT. I TRIED THE EMERGENCY BRAKE. IT DID NOT HOLD THE CAR. I PULLED OFF THE ROAD. SLOWED DOWN BY DOWN SHIFTING. COULD NOT FIND THE PROBLEM. PUMPED THE BRAKES A FEW TIMES. I SAW A PUDDLE UNDER THE DRIVERS SIDE REAR. I HAD RUPTURE IN THE METAL BRAKE LINE. I CRAWLED TO A SERVICE STATION WHO REPLACED THE BRAKE LINE. I HAVE NOT FOUND OUT WHAT IS WRONG WITH THE EMERGENCY BRAKE. *TR
NHTSA ODI #10345742
170,000 miles · Jul 26, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE BRAKING FROM 40 MPH AND APPROACHING A TRAFFIC STOP, THE BRAKE PEDAL FELL INTO THE FLOOR BOARD. THE METAL BRAKE LINE HAD FRACTURED AND CAUSED ALL BRAKE FLUID TO LEAK FROM THE VEHICLE. THE VEHICLE WAS TOWED TO THE DEALER WHO ADVISED THAT THE ENTIRE BRAK…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED WHILE BRAKING FROM 40 MPH AND APPROACHING A TRAFFIC STOP, THE BRAKE PEDAL FELL INTO THE FLOOR BOARD. THE METAL BRAKE LINE HAD FRACTURED AND CAUSED ALL BRAKE FLUID TO LEAK FROM THE VEHICLE. THE VEHICLE WAS TOWED TO THE DEALER WHO ADVISED THAT THE ENTIRE BRAKE LINE WOULD NEED TO BE REPLACED DUE TO CORROSION AND RUST. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. UPDATED 01/28/11*LJ UPDATED 04/20/11
NHTSA ODI #10345277
85,000 miles · Jul 22, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE VEHICLE WAS REPAIRED IN 2005 ACCORDING TO RECALL 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK); HOWEVER, IN MARCH 2010, THE CONTACT NOTICED THAT THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD WHEN HE ATTEMPTED TO SLOW THE VEHICLE DOWN OR STOP. THE VEHICLE WAS TAKEN TO AN AUTH…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE VEHICLE WAS REPAIRED IN 2005 ACCORDING TO RECALL 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK); HOWEVER, IN MARCH 2010, THE CONTACT NOTICED THAT THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD WHEN HE ATTEMPTED TO SLOW THE VEHICLE DOWN OR STOP. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CONTACT WAS INFORMED THAT THE FRONT SENSORS NEEDED TO BE REPLACED. THE CONTACT CALLED THE MANUFACTURER WHO OFFERED NO ASSISTANCE SINCE THE RECALL REPAIR HAD ALREADY BEEN PERFORMED. THE VEHICLE WAS NOT REPAIRED. THE CURRENT MILEAGE WAS 90,207. THE FAILURE MILEAGE WAS APPROXIMATELY 85,000.
NHTSA ODI #10344671
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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