NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter121,000 miles · Oct 26, 2010
Service Brakes, HydraulicStructure
CHEVROLET SILVERADO Z71 PICKUP TRUCK, 3 DOOR EXTENDED CAB VERSION. YEAR 2000. SEVERE BODY, BRAKE LINE AND FRAME RUST THROUGH. FRAME MEMBERS AND FUEL TANK, EXHAUST AND SHOCK ABSORBER SUPPORTS RUSTING THROUGH AND FAILING. CREATING VERY DANGEROUS CONDITION TO OCCUPANTS AND OTHER DRIVERS. BRAKE LINES FAILED COMPLETELY TWICE. BRAKE C…
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CHEVROLET SILVERADO Z71 PICKUP TRUCK, 3 DOOR EXTENDED CAB VERSION. YEAR 2000. SEVERE BODY, BRAKE LINE AND FRAME RUST THROUGH. FRAME MEMBERS AND FUEL TANK, EXHAUST AND SHOCK ABSORBER SUPPORTS RUSTING THROUGH AND FAILING. CREATING VERY DANGEROUS CONDITION TO OCCUPANTS AND OTHER DRIVERS. BRAKE LINES FAILED COMPLETELY TWICE. BRAKE CALIPER FAILURE. VIN: [XXX]. HAVE HAD TO MAKE BODY PANEL REPAIRS AND REPLACEMENT TO CONTROL RUST THROUGH, HAVE HAD A BRAKE LINE FAILURE WHILE EXITING I-10 IN FLORIDA WHILE ON A VACATION TRIP, COULD NOT STOP AT END OF EXIT RAMP AND CONTINUED THROUGH A 4 CORNER INTERSECTION WITH ONLY THE USE OF THE PARKING BRAKE. ALMOST CAUSED A MAJOR ACCIDENT WITH 3 VEHICLES. HAD TO GET EMERGENCY TOW AND REPAIRS TO CONTINUE RETURN TRIP TO MASSACHUSETTS. SECOND FAILURE OCCURRED IN TRAFFIC AFTER LEAVING REPAIR SHOP HAVING HAD TO REPLACE A RUSTED LEFT FRONT BRAKE CALIPER ! NOW, REAR FRAME CROSSMEMBERS ARE RUSTING THROUGH AND POSING A VERY DANGEROUS CONDITION TO MYSELF AND OTHERS. CHEVROLET DEALERSHIP IN HINGHAM, MA. APPEARS NOT TO BE INTERESTED IN MAKING ANY REPAIRS. BODY SHOP MANAGER SAYS, IT'S A POOR DESIGN AND POOR MATERIALS ( STEEL ) USED IN CONSTRUCTION. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10362412
203,000 miles · Oct 24, 2010
Service Brakes, HydraulicVehicle Speed ControlCrash
REAR LEFT SIDE BRAKELINE FAILURE DUE TO RUST ON 2000 CHEVY SILVERADO 1500, ON INSPECTION RUST NOTICED ON ALL BRAKE LINES. MANY SIMILAR REPORTS FROM CONSUMERS ON SAME COMPLAINT. NEWYORK BASED VEHICLE, TRUCK ALWAYS WASHED UNDERCARRIAGE TO REMOVE SALT FROM ROADWAY IN WINTER MONTHS. ALL LINES NEED REPLACEMENT...DANGEROUS CONDITION!!…
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REAR LEFT SIDE BRAKELINE FAILURE DUE TO RUST ON 2000 CHEVY SILVERADO 1500, ON INSPECTION RUST NOTICED ON ALL BRAKE LINES. MANY SIMILAR REPORTS FROM CONSUMERS ON SAME COMPLAINT. NEWYORK BASED VEHICLE, TRUCK ALWAYS WASHED UNDERCARRIAGE TO REMOVE SALT FROM ROADWAY IN WINTER MONTHS. ALL LINES NEED REPLACEMENT...DANGEROUS CONDITION!!!!! PLEASE HAVE YOUR VEHICLE INSPECTED FOR YOUR SAFETY. NO DAMAGE , CRASHED INTO CURB IN PARKING LOT. I STRONGLY BELIEVE THESE VEHICLES SHOULD ALL BE REMOVED FROM ROADS AND FIXED AT GM EXPENSE. NHTSA HAS RESPONSIBILITY TO ENFORCE SAFETY RECALLS BUT HAS YET TAKEN DUE TO INFLUENCE OF OUR "NATIONALIZED CAR MANUFACTURING COMPANY". DUE TO THE GOVERNMENT OWNERSHIP OF THIS COMPANY, ANY FAILURE TO ACT RESPONSIBLY ON THIS MATTER SHOULD BE SEEN AS "WANTON NEGLECT" BY THIS AGENCY FOR THE SAFETY OF THE PUBLIC AT LARGE & NOT JUST THESE VEHICLE OWNERS. I FULLY INTEND TO INFORM MY LOCAL REP. TO THE FAILURE OF THIS AGENCY TO TAKE SERIOUSLY THE CONSEQUENCES OF CONTINUING TO ALLOW 1.3 MILLION TRUCKS WITH KNOWN SERIOUS SAFETY ISSUES TO REMAIN OPERATING ON OUR ROADWAYS. *TR
NHTSA ODI #10362126
100,000 miles · Oct 15, 2010
Service Brakes, Hydraulic
WHILE DRIVING HOME ON THE INTERSTATE I ENCOUNTERED A TRAFFIC JAM AND HAD TO APPLY MY BRAKES. WHEN I DID, THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD TO USE MY E BRAKE TO AVOID A COLLISION. BOTH FRONT AND REAR BRAKES WERE LOST AND UPON INVESTIGATION I FOUND MOST OF MY BRAKE LINES UNDER THE CAR WERE CORRODED. I HAVE SINCE REPLACED…
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WHILE DRIVING HOME ON THE INTERSTATE I ENCOUNTERED A TRAFFIC JAM AND HAD TO APPLY MY BRAKES. WHEN I DID, THE BRAKE PEDAL WENT TO THE FLOOR AND I HAD TO USE MY E BRAKE TO AVOID A COLLISION. BOTH FRONT AND REAR BRAKES WERE LOST AND UPON INVESTIGATION I FOUND MOST OF MY BRAKE LINES UNDER THE CAR WERE CORRODED. I HAVE SINCE REPLACED THE FRONT LINES WITH A NON CORROSIVE MATERIAL AND AM IN THE PROCESS OF REPLACING THE REAR LINE. I DID SAVE ONE OF THE FRONT BRAKE LINES. *TR
NHTSA ODI #10360711
95,800 miles · Oct 13, 2010
Service Brakes, HydraulicCrash
BRAKE LINE BURST AND RESULTED IN LOW SPEED CRASH. PROPERTY AND VEHICLE DAMAGE OCCURRED DUE TO CORRODED BRAKE LINES. *TR
NHTSA ODI #10360374
189,721 miles · Oct 7, 2010
Service Brakes, Hydraulic
REAR STEEL BRAKE LINE FAILURE DUE TO CORROSION IN A NONE ENCLOSED AREA. BRAKE LINE ROTTED THROUGH IN AN AREA EXPOSED TO FRESH AIR. FURTHER INSPECTION SHOWS ALL STEEL BRAKE LINES ARE FAILING DUE TO CORROSION. BRAKE PEDAL WAS LOST ON THE HIGHWAY WHILE TOWING A 29 FOOT RV TRAVEL TRAILER. NO INCIDENT TO REPORT. *TR
NHTSA ODI #10359556
135,000 miles · Oct 7, 2010
Service Brakes, HydraulicCrash
I HAVE A 2000 CHEVROLET SILVERADO HALF TON Z71 FOUR WHEEL DRIVE PICKUP TRUCK. WHENEVER I HAVE TO BRAKE SUDDENLY THE BRAKES ABS SYSTEM KICKS IN IF I GO OVER A CRACK IN THE PAVEMENT. THE BRAKES FAIL AND I HAVE TO PUMP THE BRAKES TO STOP THE TRUCK. MY 16 YEAR OLD SON HAD A CAR ACCIDENT WITH THE TRUCK DUE TO THIS BRAKE FAILURE. H…
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I HAVE A 2000 CHEVROLET SILVERADO HALF TON Z71 FOUR WHEEL DRIVE PICKUP TRUCK. WHENEVER I HAVE TO BRAKE SUDDENLY THE BRAKES ABS SYSTEM KICKS IN IF I GO OVER A CRACK IN THE PAVEMENT. THE BRAKES FAIL AND I HAVE TO PUMP THE BRAKES TO STOP THE TRUCK. MY 16 YEAR OLD SON HAD A CAR ACCIDENT WITH THE TRUCK DUE TO THIS BRAKE FAILURE. HE HAD TO STOP SUDDENLY ON THE FREEWAY DUE TO A CAR ACCIDENT AHEAD OF HIM AND THE BRAKES FAILED WHEN THE TRUCK WENT ACROSS THE EXPANSION JOINT IN THE FREEWAY. HE REAR ENDED THE CAR IN FRONT OF HIM. IF HE HAD NOT SLOWED DOWN TO LESS THAN APPROXIMATELY 5 MPH IT COULD HAVE BEEN A VERY SERIOUS ACCIDENT. I THINK TRUCK'S ABS SYSTEM HAS A DESIGN FLAW IN IT AND COULD CAUSE SERIOUS RESULTS IF NOT LOOKED INTO. THE CHEVROLET DEALERS SAID THERE IS NO PROBLEM WITH THE SYSTEM BUT IT CONTINUES TO FAIL IN THESE SITUATIONS. *TR
NHTSA ODI #10359496
82,797 miles · Oct 4, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 5 MPH AND APPROACHING A STOP. AS THE CONTACT DEPRESSED THE BRAKES, THE BRAKE LINE RUPTURED AND THE VEHICLE WOULD NOT STOP. THE EMERGENCY BRAKE WAS UTILIZED IN ORDER TO STOP THE VEHICLE. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE TO HIS RESIDENCE WHERE H…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 5 MPH AND APPROACHING A STOP. AS THE CONTACT DEPRESSED THE BRAKES, THE BRAKE LINE RUPTURED AND THE VEHICLE WOULD NOT STOP. THE EMERGENCY BRAKE WAS UTILIZED IN ORDER TO STOP THE VEHICLE. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE TO HIS RESIDENCE WHERE HE DISCOVERED FIVE BRAKE LINES EXPELLING FROM THE ABS MODULE. ALL FIVE LINES FROM THE ABS MODULE WERE SEVERELY CORRODED AND RUSTED. THE MANUFACTURER INFORMED THE CONTACT TO TAKE THE VEHICLE TO A DEALER FOR INSPECTION. AFTER THE VEHICLE WAS INSPECTED, THE DEALER ADVISED THE CONTACT THAT ALL BRAKE LINES WOULD NEED TO BE REPLACED AT THE CONTACT'S EXPENSE. THE CONTACT REPAIRED THE VEHICLE HIMSELF. THE FAILURE MILEAGE WAS 82,797.
NHTSA ODI #10359013
46,600 miles · Sep 28, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE SPEED SENSOR FOR THE ABS WAS DEFECTIVE; WHEN HE APPLIED THE BRAKES, THEY WOULD PULSATE AND MAKE A CLICKING SOUND. THE FAILURE ONLY OCCURRED WHEN HE WOULD ATTEMPT TO COMPLETELY STOP. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER THREE TIMES AND REPAI…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE SPEED SENSOR FOR THE ABS WAS DEFECTIVE; WHEN HE APPLIED THE BRAKES, THEY WOULD PULSATE AND MAKE A CLICKING SOUND. THE FAILURE ONLY OCCURRED WHEN HE WOULD ATTEMPT TO COMPLETELY STOP. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER THREE TIMES AND REPAIRED BUT THE FAILURE CONTINUED. THE CONTACT CALLED THE MANUFACTURER WHO STATED THAT THEY WOULD CONTACT THE DEALER AND CONTACT HIM BACK. THE VEHICLE HAD NOT BEEN REPAIRED. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 46,600.
NHTSA ODI #10358011
58,000 miles · Sep 22, 2010
Service Brakes, Hydraulic
I OWN A 2000 CHEVY SILVERADO P/U I HAVE APPROX. 58000 MILES ON IT ON 9-18-2010 MY WIFE WAS RETURNING HOME AND LOST THE BRAKES ON THE TRUCK SHE WAS TWO STREETS AWAY FROM HOME SO SHE SLOWLY PROCEEDED TO DRIVE IT HOME. UPON FURTHER INSPECTION I NOTICED ALL OF THE BRAKE LINES SEVERELY RUSTED WITH ONE LEAKING INSPECTING FURTHER I…
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I OWN A 2000 CHEVY SILVERADO P/U I HAVE APPROX. 58000 MILES ON IT ON 9-18-2010 MY WIFE WAS RETURNING HOME AND LOST THE BRAKES ON THE TRUCK SHE WAS TWO STREETS AWAY FROM HOME SO SHE SLOWLY PROCEEDED TO DRIVE IT HOME. UPON FURTHER INSPECTION I NOTICED ALL OF THE BRAKE LINES SEVERELY RUSTED WITH ONE LEAKING INSPECTING FURTHER IT WAS COME TO A CONCLUSION ALL THE BRAKE LINES WOULD HAVE TO BE REPLACED AS IF YOU TOUCHED ONE YOU MIGHT COMPROMISE THE OTHERS. AFTER CALLING THE DEALER AND HEARING IT WOULD COST ME APPRX 3000 DOLLARS TO HAVE IT DONE I HAVE TAKEN THREE DAYS OFF OF WORK TO DO THIS THE BEST THAT I CAN IT CANT BE ANY WORSE THAN THE LINES THAT ARE ON THERE NOW...... *TR
NHTSA ODI #10357054
90,000 miles · Sep 18, 2010
Service Brakes, Hydraulic
CORRODED BRAKE LINES BURST DURING BRAKING, LOSS BRAKING FRONT AND REAR LINES. COMPLETE BRAKE FAILURE TOWING TRAILER. NO CRASH OR INJURIES. REPLACING ALL BRAKE LINES. *TR
NHTSA ODI #10356297
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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