I WAS TURNING A CORNER A SHORT WAY FROM MY HOUSE. MY BRAKE PEDAL SUDDENLY WENT TO THE FLOOR. I TRIED PUMPING THE BRAKES AND GOT ALMOST NO STOPPING POWER. LUCKILY, I WAS ABLE TO COAST UP INTO MY YARD. I LOOKED UNDER THE TRUCK AND THEIR WAS BRAKE FLUID ALL OVER THE FRAME RAIL AND THE BUNDLE OF LINES. ONE OR MORE HAD RUSTED THROUGH…
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I WAS TURNING A CORNER A SHORT WAY FROM MY HOUSE. MY BRAKE PEDAL SUDDENLY WENT TO THE FLOOR. I TRIED PUMPING THE BRAKES AND GOT ALMOST NO STOPPING POWER. LUCKILY, I WAS ABLE TO COAST UP INTO MY YARD. I LOOKED UNDER THE TRUCK AND THEIR WAS BRAKE FLUID ALL OVER THE FRAME RAIL AND THE BUNDLE OF LINES. ONE OR MORE HAD RUSTED THROUGH. IF I WAS IN TRAFFIC, THIS WOULD HAVE BEEN A VERY SERIOUS SITUATION! *TR
NHTSA ODI #10649253
135,000 miles · Oct 15, 2014
Service Brakes
WAS APPROACHING A STOP SIGN AT A BUSY INTERSECTION AND BRAKE PEDAL LOST PRESSURE FOLLOWED BY TOTAL BRAKE FAILURE. THANKFULLY NO ONE WAS STOPPED IN FRONT OF ME AND I SOMEHOW WAS ABLE TO MAKE IT ACROSS THE INTERSECTION WITHOUT GETTING HIT. AFTER COMING TO THIS SITE AND SEEING HUNDREDS OF RECORDED COMPLAINTS ABOUT THE EXACT SAME IS…
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WAS APPROACHING A STOP SIGN AT A BUSY INTERSECTION AND BRAKE PEDAL LOST PRESSURE FOLLOWED BY TOTAL BRAKE FAILURE. THANKFULLY NO ONE WAS STOPPED IN FRONT OF ME AND I SOMEHOW WAS ABLE TO MAKE IT ACROSS THE INTERSECTION WITHOUT GETTING HIT. AFTER COMING TO THIS SITE AND SEEING HUNDREDS OF RECORDED COMPLAINTS ABOUT THE EXACT SAME ISSUE, I'M EXTREMELY DISAPPOINTED THAT GM HAS NOT RECALLED THIS VEHICLE FOR FAULTY BRAKE LINES. *TR
NHTSA ODI #10644961
216,543 miles · Oct 6, 2014
Service Brakes
I WHILE DRIVING VEHICLE, IT LOST BRAKE PRESSURE CAUSING THE BRAKE PEDAL TO PUSH TO THE FLOOR, UPON EXAMINATION IT WAS DISCOVER THE BRAKE LINES THAT RUN FROM THE MASTER CYLINDER TO ABS MODULE WERE RUSTED OUT AND THE BRAKE LINES FROM THE ABS MODULE TO THE BRAKE CALIPERS WHERE RUSTED OUT AS WELL. THE BRAKE LINES HAD TO REPLACED. *…
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I WHILE DRIVING VEHICLE, IT LOST BRAKE PRESSURE CAUSING THE BRAKE PEDAL TO PUSH TO THE FLOOR, UPON EXAMINATION IT WAS DISCOVER THE BRAKE LINES THAT RUN FROM THE MASTER CYLINDER TO ABS MODULE WERE RUSTED OUT AND THE BRAKE LINES FROM THE ABS MODULE TO THE BRAKE CALIPERS WHERE RUSTED OUT AS WELL. THE BRAKE LINES HAD TO REPLACED. *TR
NHTSA ODI #10641871
285,000 miles · Oct 6, 2014
Service Brakes
AFTER STOPPING QUICKLY THE BROKE PEDAL WENT TO THE FLOOR AND NO LONGER HAD ANY RESISTANCE. THE BRAKING POWER WAS GREATLY REDUCED AND APPEARED THAT ONLY THE REAR BRAKES WERE FUNCTIONING. *TR
NHTSA ODI #10641594
195,815 miles · Oct 4, 2014
Service Brakes
DRIVING ABOUT 30 MPH AND APPROACHING STOPPED TRAFFIC AT A RED LIGHT HIT BRAKES TO STOP AND PEDAL WENT TO THE FLOOR WITH GREATLY REDUCED STOPPING ABILITY. HAD TO STEER OFF THE ROAD TO AVOID A REAR-END COLLISION. THIS IS SECOND TIME WITH BRAKE LINE FAILURE IN A COUPLE OF YEARS. I SPENT 30 + YEARS FULL TIME, IN-HOUSE AS S…
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DRIVING ABOUT 30 MPH AND APPROACHING STOPPED TRAFFIC AT A RED LIGHT HIT BRAKES TO STOP AND PEDAL WENT TO THE FLOOR WITH GREATLY REDUCED STOPPING ABILITY. HAD TO STEER OFF THE ROAD TO AVOID A REAR-END COLLISION. THIS IS SECOND TIME WITH BRAKE LINE FAILURE IN A COUPLE OF YEARS. I SPENT 30 + YEARS FULL TIME, IN-HOUSE AS SELF-EMPLOYED ENGINEERING CONSULTANT AT THE DAYTON, OHIO GM / DELCO / DELPHI FACILITIES AND I KNOW GM CAN DO BETTER. 10 SIBLINGS AND WE ALL HAVE BEEN GM CUSTOMERS - NET RESEARCH INDICATED $40 COST INCREASE TO GO STAINLESS STEEL ON BRAKE LINES. ( ONLY THE MOST IMPORTANT SAFETY FEATURE ON THE VEHICLE ) GENTLEMEN & LADIES ? R E A L L Y ! ! *TR
NHTSA ODI #10641426
193,990 miles · Oct 4, 2014
Service Brakes
DRIVING EAST ON OHIO STATE ROUTE AT 40 - 45 MPH SLOWING TO MAKE RIGHT TURN APPLIED BRAKES IN A NORMAL FASHION AND PEDAL WENT TO THE FLOOR WITH MINIMAL EFFECT ON VEHICLE VELOCITY. *TR
NHTSA ODI #10641401
160,000 miles · Sep 29, 2014
Service BrakesCrash
MY 1999 CHEVY SILVERADO PICKUP TRUCK EXPERIENCED A BRAKE LINE FAILURE IN MY DRIVEWAY, I WAS GOING 5 MPH OR LESS WHEN BOTH OF MY BRAKE LINE FAILED CAUSING ME TO REAR END MY DAUGHTERS CAR PARKED IN THE DRIVEWAY, LUCKY HER CAR WAS THERE OR I WOULD HAVE RUN INTO THE GARAGE DOOR. I HAD THE BRAKE LINES REPAIRED, THEY MUST HAVE ONLY R…
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MY 1999 CHEVY SILVERADO PICKUP TRUCK EXPERIENCED A BRAKE LINE FAILURE IN MY DRIVEWAY, I WAS GOING 5 MPH OR LESS WHEN BOTH OF MY BRAKE LINE FAILED CAUSING ME TO REAR END MY DAUGHTERS CAR PARKED IN THE DRIVEWAY, LUCKY HER CAR WAS THERE OR I WOULD HAVE RUN INTO THE GARAGE DOOR. I HAD THE BRAKE LINES REPAIRED, THEY MUST HAVE ONLY REPLACED THE SECTIONS THAT BROKE SINCE APROX. 1 YEAR LATER ONE OF THE BRAKE LINES BROKE AGAIN WHEN I WAS OUT OF STATE, I HAD THE SECTION THAT BROKE REPLACED JUST BEFORE THE REPAIR SHOP CLOSED AND I WAS ABLE TO GET BACK HOME. TODAY ANOTHER SECTION OF BRAKE LINE BROKE I AM GETTING THIS REPAIRED AND ANY REMAINING OLD BRAKE LINES REPLACED, ALSO MY EMERGENCY BRAKE IS BROKEN I'M NOT SURE WHAT THE PROBLEM IS YET. *TR
NHTSA ODI #10639914
216,000 miles · Sep 21, 2014
Service Brakes
WHILE APPROACHING A STOP LIGHT TO GET ON INTERSTATE 81 SOUTH IN WV, I WAS APPLYING THE BRAKES AND FELT A "POP" AND THEN I HAD NO BRAKES. I COASTED DOWN THE HILL AND ENTERED A "PARK & RIDE" LOT TO EVALUATE WHAT HAPPENED. A SIGNIFICANT AMOUNT OF BRAKE FLUID WAS POURING OUT FROM UNDER THE VEHICLE BEHIND THE DRIVERS SIDE ABOUT WHE…
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WHILE APPROACHING A STOP LIGHT TO GET ON INTERSTATE 81 SOUTH IN WV, I WAS APPLYING THE BRAKES AND FELT A "POP" AND THEN I HAD NO BRAKES. I COASTED DOWN THE HILL AND ENTERED A "PARK & RIDE" LOT TO EVALUATE WHAT HAPPENED. A SIGNIFICANT AMOUNT OF BRAKE FLUID WAS POURING OUT FROM UNDER THE VEHICLE BEHIND THE DRIVERS SIDE ABOUT WHERE THE CAB MEETS THE BED. BRAKE PEDAL GOES ALL THE WAY TO THE FLOOR AND I HAVE NO BRAKES. I HAD TO LEAVE THE VEHICLE IN WV AND GET A RIDE HOME. WILL NEED TO HAVE IT TOWED IN A DAY OR TWO. UNABLE TO ENTER VIN BECAUSE THE VEHICLE IS STILL 30+ MILES AWAY FROM MY HOUSE. *TR
NHTSA ODI #10637832
150,000 miles · Sep 4, 2014
Service Brakes
I WENT TO STOP TO MAKE A TURN AND BRAKES WENT OUT. WAS ABLE TO SLOW ENOUGH TO MAKE IT TO THE HOUSE BRAKE FLUID ALL OVER REAR TIRE. THIS IS NOT THE 1ST TIME THE 1ST TIME HAULING A TRAILER WHEN BRAKES FAILED THE NEXT TIME MY SON WAS DRIVING AND VEHICLE CUT HIM OFF SLAMMED ON THE BRAKES BLEW LINE UNDER DRIVERS DOOR CAUSED ACCIDENT …
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I WENT TO STOP TO MAKE A TURN AND BRAKES WENT OUT. WAS ABLE TO SLOW ENOUGH TO MAKE IT TO THE HOUSE BRAKE FLUID ALL OVER REAR TIRE. THIS IS NOT THE 1ST TIME THE 1ST TIME HAULING A TRAILER WHEN BRAKES FAILED THE NEXT TIME MY SON WAS DRIVING AND VEHICLE CUT HIM OFF SLAMMED ON THE BRAKES BLEW LINE UNDER DRIVERS DOOR CAUSED ACCIDENT THE NEXT TIME WAS BACKING OUT OF DRIVEWAY AND APPLIED BRAKES PEDAL WENT TO THE FLOOR AT THIS TIME I AM AFRAID TO DRIVE THE TRUCK AS I NEVER KNOW WHEN THIS IS GOING TO HAPPEN TO ME I DO ALOT OF HIGHWAY DRIVING AND I FEEL THAT AFTER REPLACING 4 BRAKES LINES IN LESS THEN A YEAR AND THE TRUCK GIVES NO WARNING OF ANY KIND THE BRAKES ARE LOW. *TR
NHTSA ODI #10630635
227,000 miles · Sep 4, 2014
Service Brakes
I AM REPORTING YET ANOTHER CASE OF FAILURE FOR THE ABS MODULE AS WELL AS THE PROPORTIONING VALVE ON MY 99 SILVERADO. THERE IS AN EXTREMELY HIGH NUMBER OF INCIDENTS REPORTED THROUGHOUT VARIOUS FORUMS ON THE INTERNET, AND THE 3 MECHANICS I'VE SPOKEN TO ARE ALL VERY AWARE OF THIS COMMON ISSUE WITH 99-02 NBS TRUCKS. TO MY KNOWLE…
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I AM REPORTING YET ANOTHER CASE OF FAILURE FOR THE ABS MODULE AS WELL AS THE PROPORTIONING VALVE ON MY 99 SILVERADO. THERE IS AN EXTREMELY HIGH NUMBER OF INCIDENTS REPORTED THROUGHOUT VARIOUS FORUMS ON THE INTERNET, AND THE 3 MECHANICS I'VE SPOKEN TO ARE ALL VERY AWARE OF THIS COMMON ISSUE WITH 99-02 NBS TRUCKS. TO MY KNOWLEDGE, THERE IS NO RECALL FOR THIS PART, WHICH IS KNOWN TO FAIL JUST AS THE ORIGINAL 60K WARRANTY WAS UP. THIS IS A VERY IMPORTANT ISSUE FOR THOSE WHO HAVE PURCHASED THESE TRUCKS USED, ESPECIALLY. WHEN THE PUMP/MODULE FAILS, THERE IS A CERTAINTY THAT ABS FUNCTION NO LONGER WORKS, AND THE HIGH PROBABILITY THAT BRAKE LINE PRESSURES ARE UNEQUALIZED, CAUSING THE BRAKES TO LOCK UP EVEN AT SPEED. *TR
NHTSA ODI #10630558
Official recalls
0
No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
2
EA04011 · 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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