NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
126 reportsClear category filter109,000 miles · May 23, 2013
Service Brakes
WAS AT BOAT RAMP PULLING TRAILER OUT OF WATER, LOUD POP, PARKED THE TRUCK. CAME BACK TO TRUCK AFTER BOATING TO FIND I HAD NO BRAKES. HAD FRONT BRAKE LINE REPLACED, VEHICLE SAT FOR APRX. 2-3 WEEKS WENT TO HOOK BOAT UP ONLY TO FIND THAT WHEN I WENT TO SHIFT INTO GEAR THE REAR BRAKE LINE RUPTURED! HAVE ALWAYS OWNED CHEVY VEHICL…
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WAS AT BOAT RAMP PULLING TRAILER OUT OF WATER, LOUD POP, PARKED THE TRUCK. CAME BACK TO TRUCK AFTER BOATING TO FIND I HAD NO BRAKES. HAD FRONT BRAKE LINE REPLACED, VEHICLE SAT FOR APRX. 2-3 WEEKS WENT TO HOOK BOAT UP ONLY TO FIND THAT WHEN I WENT TO SHIFT INTO GEAR THE REAR BRAKE LINE RUPTURED! HAVE ALWAYS OWNED CHEVY VEHICLES, TIME TO LISTEN TO MY FATHERS ADVICE AND GO TO FORD! *TR
NHTSA ODI #10513276
104,800 miles · May 22, 2013
Service Brakes
BACKING BOAT INTO WATER AT BOAT RAMP. APPLIED BRAKES TO STOP, PEDAL WENT TO FLOOR, SLAMMED TRANSMISSION INTO PARK AND WAS ABLE TO STOP WITHOUT LOSING MY BOAT AND TRUCK. INSPECTED ALL LINES--ALL CORRODED AND SEEPING BRAKE FLUID. TRUCK HAS ONLY 105,000 MILES, WAS RUSTPROOFED AND UNDERCARRIAGE WASH EVERY WEEK DURING WINTER. HAVE H…
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BACKING BOAT INTO WATER AT BOAT RAMP. APPLIED BRAKES TO STOP, PEDAL WENT TO FLOOR, SLAMMED TRANSMISSION INTO PARK AND WAS ABLE TO STOP WITHOUT LOSING MY BOAT AND TRUCK. INSPECTED ALL LINES--ALL CORRODED AND SEEPING BRAKE FLUID. TRUCK HAS ONLY 105,000 MILES, WAS RUSTPROOFED AND UNDERCARRIAGE WASH EVERY WEEK DURING WINTER. HAVE HAD CHEVY VEHICLES AND RAN THEM UP TO 300,000 MILES IN THE 70'S AND 80'S AND NEVER HAD A BRAKE LINE FAILURE. IT IS OBVIOUS THE LINES ARE OF LOW QUALITY-PURCHASED SS LINES PENDING REPAIR. *TR
NHTSA ODI #10513092
175,000 miles · May 3, 2013
Service Brakes
REAR BRAKE LINE (NOT BRAKE HOSE) RUPTURED DUE TO CORROSION. I WAS STILL IN MY DRIVEWAY WHEN THE LINE RUPTURED BUT, WAS FIVE MINUTES FROM GETTING ON THE INTERSTATE. I WAS PULLING A TRAILER WHEN THE RUPTURE OCCURRED. WHEN I APPLIED THE BRAKE THE PEDAL WENT TO THE FLOOR WITH NO WARNING. MY DRIVEWAY IS ON A STEEP HILL BUT, I WAS ABL…
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REAR BRAKE LINE (NOT BRAKE HOSE) RUPTURED DUE TO CORROSION. I WAS STILL IN MY DRIVEWAY WHEN THE LINE RUPTURED BUT, WAS FIVE MINUTES FROM GETTING ON THE INTERSTATE. I WAS PULLING A TRAILER WHEN THE RUPTURE OCCURRED. WHEN I APPLIED THE BRAKE THE PEDAL WENT TO THE FLOOR WITH NO WARNING. MY DRIVEWAY IS ON A STEEP HILL BUT, I WAS ABLE TO STOP THE VEHICLE WITH THE PARKING BRAKE BEFORE ENTERING THE STREET. VERY DANGEROUS. I USE THIS VEHICLE EVERY DAY. THIS COULD HAVE RESULTED IN A SERIOUS ACCIDENT SINCE I WAS PULLING A TRAILER AND HEADED FOR THE INTERSTATE, AS STATED EARLIER. I THOUGHT THESE VEHICLES WITH THE SPLIT MASTER CYLINDER STILL PROVIDED SOME BRAKING IN SITUATIONS SUCH AS THIS. APPARENTLY NOT. *TR
NHTSA ODI #10510479
149,822 miles · Apr 4, 2013
Service BrakesCrash
WHILE COMING DOWN A HILL TO A RED LIGHT, I APPLIED MY BRAKES AND THE BRAKE WENT TO THE FLOOR. AS IT WENT TO THE FLOOR I HEARD A NOISE, TURNED MY WHEEL TO ADVOID HITTING THE CAR INFRONT OF ME, I RAN OVER A SPEED LIMIT SIGN, ONLY TO MISS A BUILDING BY APPLING THE PARKING BRAKE. I WAS ONLY GOING 25MPH. A COP BEHIND ME HEARD THE POP…
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WHILE COMING DOWN A HILL TO A RED LIGHT, I APPLIED MY BRAKES AND THE BRAKE WENT TO THE FLOOR. AS IT WENT TO THE FLOOR I HEARD A NOISE, TURNED MY WHEEL TO ADVOID HITTING THE CAR INFRONT OF ME, I RAN OVER A SPEED LIMIT SIGN, ONLY TO MISS A BUILDING BY APPLING THE PARKING BRAKE. I WAS ONLY GOING 25MPH. A COP BEHIND ME HEARD THE POP AND STOP TO SEE IF WE (ME, MY FIANCE AND CHILD) WERE ALRIGHT. WHEN I TALK TO MY MECHANIC, HE SAID THERE HAS BEEN ALOT OF REPORTS OF THE BREAK LINES FAILING IN THE SILVERADO. THAT MOST OF HIS OTHER CLIENTS THAT HAVE HAD THIS PROBLEM CALL A CHEVY DEALER AND THEY EITHER PAID FOR THE REPAIRS OR GIVEN UP TO $500 TO THE REPAIRS. I CALL JBA CHEVROLET IN GLEN BURNIE MARYLAND, AND THEY STATED THAT THEY ARE UNWARE OF SUCH A PROBLEM AND REFUSE TO LOOK INTO OR HELP IN THE REPAIR. I HAVE READ OF THE CONCERNS/REPORTS OF OTHERS AND I AM WONDERING WHY THERE IS NOT A RECALL. FAMILIES ARE AT RISK. WHAT ACTIONS CAN I AND OTHER DRIVERS TAKE? CHEVY SHOULD BE HELD RESPONSIBLE. *TR
NHTSA ODI #10507136
27,643 miles · Mar 22, 2013
Service Brakes
ALL BRAKES LINES HAD TO BE REPLACED BECAUSE THEY RUSTED THROUGH. BRAKES HAD FAILED WHEN DRIVING ON HIGHWAY PRIOR TO REPLACEMENT THEN MYSTERIOUSLY CAME BACK LOCKED ON ONE SIDE (LEFT REAR). *TR
NHTSA ODI #10504104
163,850 miles · Mar 9, 2013
Service Brakes
DEAR SIR OR MADAM, I HAVE A 1999 CHEVY SILVERADO. I JUST HAD THE BRAKE LINES BURST ON MY CHEVY PICKUP. HAVING HEARD IT REPORTED ON THE LOCAL NEWS AND READING ABOUT IT ON LINE THAT. IT IS AN ISSUE THAT NEEDS TO BE ADDRESS, GM NEEDS TO STEP UP AND FIX THEIR LOW QUALITY WORK. TOYOTA HAD TO FIX THEIR GAS PEDAL ISSUE, THIS IS …
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DEAR SIR OR MADAM, I HAVE A 1999 CHEVY SILVERADO. I JUST HAD THE BRAKE LINES BURST ON MY CHEVY PICKUP. HAVING HEARD IT REPORTED ON THE LOCAL NEWS AND READING ABOUT IT ON LINE THAT. IT IS AN ISSUE THAT NEEDS TO BE ADDRESS, GM NEEDS TO STEP UP AND FIX THEIR LOW QUALITY WORK. TOYOTA HAD TO FIX THEIR GAS PEDAL ISSUE, THIS IS A FAR WORSE ISSUE WHEN YOU HAVE NO BRAKES AND YOUR CAR IS FULL OF PEOPLE. *TR
NHTSA ODI #10502215
114,658 miles · Mar 3, 2013
Service Brakes
REPLACED BRAKES AND CALIPERS BLEED SYSTEM THEN WENT TO DRIVE AND WHEN STOPPING NO PEDAL AT AL. REAR BRAKES WORK FRONTS DON'T. REBLED BRAKES AND WITH BOTH FRONT LINES OFF THERE IS NO FLUID COMING OUT THE LINES AND WHEN TESTING THE REAR I GET FLUID COMING OUT. MY TRUCK IS DISABLED TILL I CAN FIX THIS. *TR
NHTSA ODI #10501106
95,670 miles · Feb 25, 2013
Service Brakes
SUDDEN BRAKE FAILURE WHEN SLOWING TO TURN OFF THE HIGHWAY INTO A GAS STATION. THE BRAKE PEDAL WHEN COMPLETELY TO THE FLOOR WITH VERY LITTLE BRAKE FUNCTION. AFTER INSPECTION I FOUND A HOLE RUSTED IN ONE OF THE METAL BRAKE LINES JUST BELOW THE DRIVERS DOOR. *TR
NHTSA ODI #10500059
128,520 miles · Jan 2, 2013
Service Brakes
THE BRAKE LINE ON MY CHEVY SILVERADO PICK UP RUPTURED DO TO RUST. THE LINE IS LOCATED JUST UNDER THE DRIVERS DOOR. IT RUNS FROM THE MASTER CYLINDER TO THE ABS BLOCK. *TR
NHTSA ODI #10490713
83,231 miles · Dec 17, 2012
Service Brakes
I JUST SPENT OVER 2K REPLACING ALL OF MY BRAKE LINES WITH STAINLESS STEEL THE WAY THE FACTORY SHOULD HAVE DONE IT ORIGINALLY ON MY 1999 CHEVY SILVERADO. MY MECHANIC ALMOST HIT THE BAY DOOR WHEN THE BRAKE PEDAL WENT TO THE FLOOR AS THE RUSTED BRAKE LINE BLEW OUT. THE LOCAL GM DEALER THAT REPLACED THE LINES HAD ANOTHER CHEVY IN WI…
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I JUST SPENT OVER 2K REPLACING ALL OF MY BRAKE LINES WITH STAINLESS STEEL THE WAY THE FACTORY SHOULD HAVE DONE IT ORIGINALLY ON MY 1999 CHEVY SILVERADO. MY MECHANIC ALMOST HIT THE BAY DOOR WHEN THE BRAKE PEDAL WENT TO THE FLOOR AS THE RUSTED BRAKE LINE BLEW OUT. THE LOCAL GM DEALER THAT REPLACED THE LINES HAD ANOTHER CHEVY IN WITH THE SAME PROBLEM AND SAID THEY ARE GETTING 1 TO 2 PER WEEK WITH THE SAME, EXACT PROBLEM! I WAS LUCKY I WASN'T DRIVING ON THE INTERSTATE WHEN THE LINE BLEW OUT. SOMEONE IS GOING TO BE KILLED AND GM NEEDS TO DO A RECALL. *TR
NHTSA ODI #10489074
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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