NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
78 reportsClear category filter70,000 miles · Jun 20, 2013
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT UPON INSPECTION, IT WAS FOUND THAT THE BRAKE LINES WERE RUSTED. THE VEHICLE WAS TAKEN TO A MECHANIC WHO CONFIRMED THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED ABOUT THE FAILURE. THE FAILURE MILEAGE WAS 70,000 AND THE CURRENT MILEAGE…
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT UPON INSPECTION, IT WAS FOUND THAT THE BRAKE LINES WERE RUSTED. THE VEHICLE WAS TAKEN TO A MECHANIC WHO CONFIRMED THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED ABOUT THE FAILURE. THE FAILURE MILEAGE WAS 70,000 AND THE CURRENT MILEAGE WAS 156,000. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #10520900
100,791 miles · May 4, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS APPLIED AND BECAME STUCK TO THE FLOORBOARD ABNORMALLY. THE CONTACT WAS ABLE TO CONTROL THE VEHICLE IN ORDER TO AVOID CRASHING INTO A PRECEDING VEHICLE. THE CONTACT DROVE THE VEHICLE HOME, INSPECTED THE BRAKE SYSTEM AND…
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 50 MPH, THE BRAKE PEDAL WAS APPLIED AND BECAME STUCK TO THE FLOORBOARD ABNORMALLY. THE CONTACT WAS ABLE TO CONTROL THE VEHICLE IN ORDER TO AVOID CRASHING INTO A PRECEDING VEHICLE. THE CONTACT DROVE THE VEHICLE HOME, INSPECTED THE BRAKE SYSTEM AND DISCOVERED THAT SEVERAL BRAKE LINES WERE CORRODED. ONE OF THE BRAKE LINES WAS REPLACED A FEW YEARS PRIOR TO THE MOST RECENT FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 100,791.
NHTSA ODI #10457464
Mileage unknown · Mar 14, 2012
Service Brakes, Hydraulic
I WAS DRIVING IN MEDIUM TRAFFIC WHEN A VEHICLE IN FRONT OF ME STOPPED QUICKLY AND I APPLIED MY BRAKES. THEN I NOTICED THE PEDDLE GO DOWN TO THE FLOOR. THAT WAS THE ONLY WARNING I RECEIVED AND SO I IMMEDIATELY DROVE HOME PUMPING MY BRAKES WHEN I NEEDED TO STOP AND TRIED TO STOP INFREQUENTLY AS POSSIBLE. *TR
NHTSA ODI #10451581
34,000 miles · Dec 18, 2011
Service Brakes, Hydraulic
THE 1ST PROB LEFT REAR BRAKE LINE BROKE. 2ND PROB 37000 MI HAD TO REPLACE ALL ROTORS AND PADS BECAUSE ROTORS RUSTED AND CHEWED UP PADS,ALSO REPLACED 1 CALIPER AND BRAKE LINE. 3RD PROB 10/11 42115 MI OTHER REAR BRAKE LINE BROKE. 4RTH PROB 12/11 42450MI BRAKE LINE TO THE PROPORTIONING VALVE BROKE. THE FIRST PROB I WAS ROLLING TO …
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THE 1ST PROB LEFT REAR BRAKE LINE BROKE. 2ND PROB 37000 MI HAD TO REPLACE ALL ROTORS AND PADS BECAUSE ROTORS RUSTED AND CHEWED UP PADS,ALSO REPLACED 1 CALIPER AND BRAKE LINE. 3RD PROB 10/11 42115 MI OTHER REAR BRAKE LINE BROKE. 4RTH PROB 12/11 42450MI BRAKE LINE TO THE PROPORTIONING VALVE BROKE. THE FIRST PROB I WAS ROLLING TO A STOP @ A STOP SIGN. THE 3RD AND 4RTH PROB HAPPENED IN MY DRIVEWAY. IT SHOULD BE A CRIME TO PUT PEOPLES LIVES IN DANGER BECAUSE OF INFERIOR MATERIALS.
NHTSA ODI #10440768
116,000 miles · Nov 13, 2011
Service Brakes, Hydraulic
THANK GOODNESS NO ONE WAS HURT, AND NO VEHICLE HIT WHEN MY BRAKE LINES BURST ON THIS VEHICLE. WHEN REPAIRED THE MECHANIC SAID THEY BASICALLY ROTTED OFF FROM RUST AND THAT THIS IS A VERY COMMON PROBLEM ON THESE VEHICLES. I UNDERSTAND SOME MAINTENANCE IS NORMAL ON ANY TRUCK, BUT BEING ABLE TO USE YOUR FINGERS TO CRUMBLE PARTS OF…
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THANK GOODNESS NO ONE WAS HURT, AND NO VEHICLE HIT WHEN MY BRAKE LINES BURST ON THIS VEHICLE. WHEN REPAIRED THE MECHANIC SAID THEY BASICALLY ROTTED OFF FROM RUST AND THAT THIS IS A VERY COMMON PROBLEM ON THESE VEHICLES. I UNDERSTAND SOME MAINTENANCE IS NORMAL ON ANY TRUCK, BUT BEING ABLE TO USE YOUR FINGERS TO CRUMBLE PARTS OF THE BRAKE LINE IS NOT. YOU NEED TO INVESTIGATE THIS BEFORE PEOPLE ARE HURT OR KILLED, IF SOME HAVEN'T BEEN ALREADY. YOU ALSO NEED TO REVISIT THE ABS SENSOR PROBLEM FROM THE PREVIOUS RECALL. THAT FIX DID NOT WORK, SO ALL I COULD DO IS DISCONNECT THEM OR CHANCE AN ACCIDENT!!!!!!!!!! *TR
NHTSA ODI #10435392
85,000 miles · Nov 10, 2011
Service Brakes, HydraulicStructureSuspension
RUST- HAD TO REPLACE ALL THE BRAKE LINES,ROCKER PANELS AND CAB CORNERS,GAS TANK STRAPS RUSTED OUT AND BROKE OFF .BOTH SPRING SHACKLES BROKE FROM RUST AND HAD TO BE REPLACED,THE FRAME HAD TO BE FIXED(CRACKED) AND NOW THE SHOCK MOUNTS HAVE RUSTED OFF AND HAVE TO BE FIXED AND ITS ONLY GOT 115,000 MILES. *TR
NHTSA ODI #10435171
Mileage unknown · Nov 9, 2011
Service Brakes, HydraulicStructure
MY 2000 GMC SIERRA'S FRAME IS EXTREMELY RUSTED. PARTS OF THE FRAME HAVE RUSTED COMPLETELY THROUGH. ALL THE BRAKES LINES HAVE BEEN REPLACED DUE TO RUST AS HAVE MANY OTHER BRAKE PARTS. I PURCHASED THE TRUCK USED BUT PREVIOUS OWNER STATED HE REPLACED THE BRAKE LINES DUE TO A LOW SPEED ACCIDENT. *TR
NHTSA ODI #10435108
118,000 miles · Nov 2, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 45 MPH, HE APPLIED THE BRAKES AND THE PEDAL WAS DEPRESSED TO THE FLOORBOARD. THE VEHICLE COASTED TO A STOP AND WAS SAFELY DRIVEN HOME AND THE CONTACT NOTICED THAT THERE WAS A HOLE IN THE BRAKE LINES DUE TO CORROSION. THE VEHICLE WAS NOT REPAIRED. …
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TL* THE CONTACT OWNS A 2000 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING 45 MPH, HE APPLIED THE BRAKES AND THE PEDAL WAS DEPRESSED TO THE FLOORBOARD. THE VEHICLE COASTED TO A STOP AND WAS SAFELY DRIVEN HOME AND THE CONTACT NOTICED THAT THERE WAS A HOLE IN THE BRAKE LINES DUE TO CORROSION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 118,000. THE VIN WAS UNAVAILABLE. UPDATED 12/17/11 *BF UPDATED 01/18/12
NHTSA ODI #10433958
72,000 miles · Oct 27, 2011
Service Brakes, Hydraulic
TRUCK HAD FAILED TO STOP AT AN INTERSECTION AS WE APPROACHED RED LIGHT. UPON DEPRESSING THE PEDAL THE BRAKE PEDAL WENT TO THE FLOOR JUST ENOUGH TO GET TRUCK SLOWED BEFORE EMERGENCY PEDAL WAS DEPRESSED TO COME TO A COMPLETE STOP. WE WERE TRAVELING ABOUT 20 MILES AN HOUR BEFORE WE REACHED INTERSECTION ABOUT 75 YARDS AWAY. AS LI…
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TRUCK HAD FAILED TO STOP AT AN INTERSECTION AS WE APPROACHED RED LIGHT. UPON DEPRESSING THE PEDAL THE BRAKE PEDAL WENT TO THE FLOOR JUST ENOUGH TO GET TRUCK SLOWED BEFORE EMERGENCY PEDAL WAS DEPRESSED TO COME TO A COMPLETE STOP. WE WERE TRAVELING ABOUT 20 MILES AN HOUR BEFORE WE REACHED INTERSECTION ABOUT 75 YARDS AWAY. AS LIGHT TURNED GREEN, WE SLOWLY PULLED INTO A PARKING LOT AND PARKED TRUCK UNTIL A TOW TRUCK COULD GET VEHICLE BACK TO THE GARAGE FOR REPAIRS. UPON INSPECTION BY OUR MECHANIC, IT WAS FOUND THAT THE BRAKE LINE HAD RUPTURED NEAR THE ANTI-LOCK BRAKE HOUSING WHICH WAS CAUSED BY CORROSSION AND POOR BRAKE LINE TUBING MATERIAL. IT WAS NOTED THAT MATERIAL WAS NOT STAINLESS STEEL OR ANY NON-CORROSIVE MATERIAL SUPPLIED AND INSTALLED BY THE OEM. IT TOOK TWO WEEKS FOR OUR TRUCK TO BE REPAIRED AS THE MECHANIC HAD TO CUSTOMER BEND THE NEW BRAKE LINES BECAUSE OEM DOES NOT HAVE REPLACEMENT LINES WHICH CAME TO A FINAL COST OF CLOSE TO $1300. *TT
NHTSA ODI #10433086
138,000 miles · Oct 26, 2011
Service Brakes, Hydraulic
1ST INCIDENT ON OR ABOUT NOVEMBER 2010 REAR BRAKE LINE FAILURE NO PREVIOUS WARNING LIGHT INDICATION - STEEL LINE BURST CAUSING BRAKE FAILURE ALONG WITH EMERGENCY BRAKE FAILED THIS HAPPENED AT ABOUT 10 MILES AN HOUR SO THE VEHICLE WAS ABLE TO BE STOPPED BY A CURB. TESTING THE BRAKES NONE WORKED EVEN THOUGH IT WAS A REAR LINE FAI…
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1ST INCIDENT ON OR ABOUT NOVEMBER 2010 REAR BRAKE LINE FAILURE NO PREVIOUS WARNING LIGHT INDICATION - STEEL LINE BURST CAUSING BRAKE FAILURE ALONG WITH EMERGENCY BRAKE FAILED THIS HAPPENED AT ABOUT 10 MILES AN HOUR SO THE VEHICLE WAS ABLE TO BE STOPPED BY A CURB. TESTING THE BRAKES NONE WORKED EVEN THOUGH IT WAS A REAR LINE FAILURE. VEHICLE TOWED AND REPAIRED BY REPLACING THE LINE FROM ABSBOX TO REAR AND THE EMERGENCY BRAKE SHOES AND REAR DISC PADS WERE ALSO REPLACED. EVEN WITH THE EMERGENCY BRAKE SHOE REPLACEMENT ITS ABILITY TO STOP THE TRUCK WAS MINIMAL AT BEST 2ND INCIDENT ON OR ABOUT AUGUST 2011 THE TRUCK FAILED TO PASS NC STATE SAFETY INSPECTION AS EMERGENCY BRAKE WOULD NOT HOLD - THE EMERGENCY BRAKE SHOES AND REAR DISC PADS WERE REPLACED AGAIN WITH SIMILAR RESULTS WITH THE PREVIOUS REPLACEMENT - WITH MARGINAL EMERGENCY BRAKING OPERATION, BUT ENOUGH TO PASS THE NC STATE INSPECTION - ALSO THE BACKING PLATES OF THE REAR BRAKES HAD TO BE REPLACED AS THEY HAD RUSTED AWAY 3RD INCIDENT ON OR ABOUT OCTOBER 2011 FRONT BRAKE FAILURE NO PREVIOUS WARNING LIGHT INDICATION - STEEL LINE TO FRONT BRAKES BURST WHERE TWO OF THE LINES WERE RUBBING TOGETHER WHERE THEY CROSS OVER THE FRAME FROM THE ABS BOX. THIS OCCURRED AT A STOP SIGN. THE HYDRAULIC SYSTEM MAINTAINED SOME STOPPING ABILITY AND THAT COMBINED WITH THE RECENTLY REPLACED EMERGENCY BRAKE PADS DID STOP THE TRUCK JUST SLIGHTLY PAST THE STOP SIGN. TO MOVE THE VEHICLE TO A SAFE LOCATION IT HAD NO HYDRAULIC STOPPING ABILITY, BUT THE EMERGENCY BRAKE DID FUNCTION MARGINALLY AT THE VERY SLOW SPEED. THE VEHICLE AGAIN NEEDED TO BE TOWED. DUE TO THE WAY THE FRONT FOUR STEEL LINES ARE RUN AND BUNDLED TOGETHER WITH OBVIOUS OTHER POINTS WHERE THESE LINES RUB TOGETHER COMBINED WITH RUST WILL REQUIRE ALL THE FRONT STEEL LINES TO BE REPLACED INCLUDING THE STEEL LINES FROM THE MASTER CYLINDER TOO THE ABS BOX. *TT
NHTSA ODI #10432829
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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