NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
184 reportsClear category filter170,000 miles · Oct 3, 2017
Service Brakes
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 7 MPH, THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND PULSATED UNTIL THE VEHICLE STOPPED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT STATED THAT THE FAILURE STARTED INTERMITTENTLY APPROXIMATELY THREE WEEKS AGO AND HAS BECOME WORSE. THE FAI…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 7 MPH, THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND PULSATED UNTIL THE VEHICLE STOPPED. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE CONTACT STATED THAT THE FAILURE STARTED INTERMITTENTLY APPROXIMATELY THREE WEEKS AGO AND HAS BECOME WORSE. THE FAILURE OCCURRED DAILY. THE VEHICLE WAS NOT DIAGNOSED BY AN INDEPENDENT MECHANIC OR A DEALER. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE, BUT THE VIN WAS NOT INCLUDED IN A RECALL. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 170,000.
NHTSA ODI #11031601
175,000 miles · Oct 2, 2017
Electrical SystemService BrakesCrash
THE ANTI-LOCK BRAKE SYSTEM ENGAGES AT SLOW SPEEDS CAUSING INABILITY TO STOP. THE ROAD SURFACE DOES NOT MATTER, WET, DRY, DIRT OR PAVED, IT IS A FAILING SYSTEM. THIS WAS A RANDOM PROBLEM, NOW IT HAPPENS ALL THE TIME. THE SYSTEM WILL MAKE A RATCHETING SOUND THEN A GRINDING BEFORE AS YOU COME TO A STOP. YOU HAVE TO BE READY TO LET …
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THE ANTI-LOCK BRAKE SYSTEM ENGAGES AT SLOW SPEEDS CAUSING INABILITY TO STOP. THE ROAD SURFACE DOES NOT MATTER, WET, DRY, DIRT OR PAVED, IT IS A FAILING SYSTEM. THIS WAS A RANDOM PROBLEM, NOW IT HAPPENS ALL THE TIME. THE SYSTEM WILL MAKE A RATCHETING SOUND THEN A GRINDING BEFORE AS YOU COME TO A STOP. YOU HAVE TO BE READY TO LET OFF THE BRAKE AND REAPPLY PRESSURE HOPING IT WORKS. I LIVE IN A NEIGHBORHOOD WITH SMALL CHILDREN RUNNING AROUND EVERYWHERE. I WOULD HATE TO THINK WHAT WOULD HAPPEN IF THESE BRAKES FAILED ME WHEN I REALLY NEEDED THEM.
NHTSA ODI #11030820
172,000 miles · Sep 3, 2017
Service Brakes
ALL BRAKE LINE FOR ENTIRE TRUCK HAD TO BE REPLACED BECAUSE OF RUST ISSUES, AS WELL AS REAR BACKING PLATES WHICH HAD RUSTED COMPLETELY AWAY. ABS SENSORS ARE ACTIVATING AT LOW SPEED ON DRY PAVEMENT CAUSING TRUCK TO TAKE LONGER SPACE TO STOP
NHTSA ODI #11021260
134,000 miles · Aug 2, 2017
Service Brakes
BRAKE LINES ARE SEVERELY CORRODED. CAUSING PIN HOLE LEAKS. LINES ARE SO SEVERELY CORRODED THAT THERE IS NO WAY TO FIX EXCEPT TO REPLACE ALL BAKE LINES. THIS IS A EXTERME COSTLY REPAIR. DEALER SHIP QUOTED A MINIMUM $1700.00 BUT COULD BE HIGHER. LEAKS OCCURR WHILE DRIVING THEN APPLYING BRAKES DUE TO CORROSION CAUSE WEAK SPOTS…
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BRAKE LINES ARE SEVERELY CORRODED. CAUSING PIN HOLE LEAKS. LINES ARE SO SEVERELY CORRODED THAT THERE IS NO WAY TO FIX EXCEPT TO REPLACE ALL BAKE LINES. THIS IS A EXTERME COSTLY REPAIR. DEALER SHIP QUOTED A MINIMUM $1700.00 BUT COULD BE HIGHER. LEAKS OCCURR WHILE DRIVING THEN APPLYING BRAKES DUE TO CORROSION CAUSE WEAK SPOTS IN LINES. LEAKS ONLY OCCURR WHILE DRIVING THEN APPLYING BRAKES THAT CAUSE INCREASE IN PRESSURE IN LINES. THIS COULD BE VERY DANGEROUS IN FAST MOVING TRAFFIC.
NHTSA ODI #11012458
251,000 miles · Feb 28, 2017
Service Brakes
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. WHILE DRIVING 6 MPH, THE BRAKES FAILED TO WORK WITHOUT WARNING. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 251,000.
NHTSA ODI #10957599
138,000 miles · Jan 17, 2017
Service Brakes
CAME OUT OF A RESTAURANT PUT FOOT ON BRAKE PEDAL AND IT WENT TO THE FLOOR HAD TRUCK TOWED TO DEALER AND WAS TOLD BRAKE LINES NEED REPLACING AT A COST OF 1100.00 DOLLARS. JUST GLAD THAT I WASN'T DRIVING AS THIS WAS VERY DANGEROUS. *TR
NHTSA ODI #10945872
100,000 miles · Jan 12, 2017
Service Brakes
STARTED VEHICLE EARLY ONE MORNING FOR THE FIRST TIME THAT DAY, ALLOWED IT TO WARM UP FOR ABOUT ONE (1) MINUTE AND THEN PLACED IT INTO REVERSE TO BACK OUT OF DRIVEWAY. AFTER TRAVELING ABOUT SIX (6) FEET IN REVERSE ATTEMPTED TO STOP, PEDAL WENT COMPLETELY TO FLOOR WITH NO RESISTANCE AT ALL AND VEHICLE STOPPED AFTER ABOUT SIX (6) F…
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STARTED VEHICLE EARLY ONE MORNING FOR THE FIRST TIME THAT DAY, ALLOWED IT TO WARM UP FOR ABOUT ONE (1) MINUTE AND THEN PLACED IT INTO REVERSE TO BACK OUT OF DRIVEWAY. AFTER TRAVELING ABOUT SIX (6) FEET IN REVERSE ATTEMPTED TO STOP, PEDAL WENT COMPLETELY TO FLOOR WITH NO RESISTANCE AT ALL AND VEHICLE STOPPED AFTER ABOUT SIX (6) FEET. THERE WAS A COMPLETE AND TOTAL BRAKE FAILURE. NO PRIOR INDICATIONS, NO DASHBOARD WARNING LIGHT. AFTER STOPPING THE VEHICLE I NOTICED A SMALL PUDDLE OF LIQUID ON THE GROUND NEAR THE REAR OF THE DRIVER'S SIDE DOOR. AFTER HAVING VEHICLE TOWED TO REPAIR SHOP I WAS NOTIFIED BY THE REPAIR SHOP THAT THE BRAKE LINES HAD COMPLETED CORRODED. TOTAL REPAIR SHOP COST TO REPLACE ALL BRAKE LINES WAS $810.36. THIS DID NOT INCLUDE THE COST OF THE TOW TRUCK TO GET THE VEHICLE TO THE REPAIR FACILITY. I AM THE FIRST AND ONLY OWNER OF THIS VEHICLE. *TR
NHTSA ODI #10944597
135,000 miles · Nov 17, 2016
Service Brakes
COMPLETE BRAKE FAILURE ON A BUSY SUBURBAN STREET. I WAS INTENDING TO STOP FOR A RED LIGHT AND HAD NO BRAKES. PEDAL WENT TO THE FLOOR. NO COLLISON. TRUCK NEEDED TO BE TOWED TO REPAIR SHOP. COST WAS $872.73.
NHTSA ODI #10926689
86,412 miles · Sep 27, 2016
Service Brakes
WE JUST PURCHASED A USED 2002 CHEVY SILVERADO ON 9/25, TOOK IT FOR A SAFETY INSPECTION AND WAS TOLD THAT THE BRAKE LINES HAD BURST AND BRAKE FLUID WAS LEAKING. THESE REPAIRS ARE GOING TO BE VERY EXPENSIVE AND I FEEL THAT GM SHOULD COVER THE COST OF THE REPAIRS, SINCE THERE ARE HUNDREDS OF PROBLEMS WITH THE BRAKE LINES ON VEHICLE…
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WE JUST PURCHASED A USED 2002 CHEVY SILVERADO ON 9/25, TOOK IT FOR A SAFETY INSPECTION AND WAS TOLD THAT THE BRAKE LINES HAD BURST AND BRAKE FLUID WAS LEAKING. THESE REPAIRS ARE GOING TO BE VERY EXPENSIVE AND I FEEL THAT GM SHOULD COVER THE COST OF THE REPAIRS, SINCE THERE ARE HUNDREDS OF PROBLEMS WITH THE BRAKE LINES ON VEHICLES OF THIS YEAR/MAKE/MODEL.
NHTSA ODI #10910017
163,000 miles · Sep 14, 2016
Service Brakes
TRAVELLING FROM PA TO CAPE HATTERAS, NC. TOTAL BRAKE FAILURE OF ALL 4 WHEELS IN BUMPER TO BUMPER TRAFFIC ON US 158 S BYPASS IN KILL DEVIL HILLS. MANAGED TO SWERVE ONTO RIGHT BERM GRASSY AREA AND SHIFT TO LOW AND USE HAND BRAKE TO STOP. HAD TWO CHILDREN IN THE BACK SEAT. ONE WAS A 2 YEAR OLD. HAD TO DRIVE 42 MILES WITH NO BRAKES …
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TRAVELLING FROM PA TO CAPE HATTERAS, NC. TOTAL BRAKE FAILURE OF ALL 4 WHEELS IN BUMPER TO BUMPER TRAFFIC ON US 158 S BYPASS IN KILL DEVIL HILLS. MANAGED TO SWERVE ONTO RIGHT BERM GRASSY AREA AND SHIFT TO LOW AND USE HAND BRAKE TO STOP. HAD TWO CHILDREN IN THE BACK SEAT. ONE WAS A 2 YEAR OLD. HAD TO DRIVE 42 MILES WITH NO BRAKES TO REACH DESTINATION. MECHANIC IN RODANTHE HAD TO REPLACE ALL BRAKE LINES AND MASTER CYLINDER. BRAKE LINES WERE TOTALLY RUSTED OUT. IF THIS WOULD HAVE HAPPENED ON I-95 AT 70 MPH WE WOULD PROBABLY ALL HAVE BEEN KILLED.
NHTSA ODI #10906749
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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