THE INCIDENT HAPPENED WHILE DRIVING HOME FROM TOLEDO OHIO TO HOME IN WHITE LAKE MICHIGAN. MY EXIT WAS NORMAL WHEN EXITING THE FREEWAY. I APPLIED BRAKES TO BEGIN SLOWING DOWN. AS I APPROACHED THE END OF THE EXIT RAMP THE TRAFFIC LIGHT WAS RED WITH OTHER VEHICLES WAITING. I APPLIED THE BRAKES HARDER AND HEARD A POPPING NOISE. …
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THE INCIDENT HAPPENED WHILE DRIVING HOME FROM TOLEDO OHIO TO HOME IN WHITE LAKE MICHIGAN. MY EXIT WAS NORMAL WHEN EXITING THE FREEWAY. I APPLIED BRAKES TO BEGIN SLOWING DOWN. AS I APPROACHED THE END OF THE EXIT RAMP THE TRAFFIC LIGHT WAS RED WITH OTHER VEHICLES WAITING. I APPLIED THE BRAKES HARDER AND HEARD A POPPING NOISE. THE BRAKE PEDAL WENT TO THE FLOOR. I TRIED TO PUMP THE BRAKES TO GET THEM TO WORK TO NO AVAIL. RATHER THAN RUNNING IN TO STOPPED CARS I RAN MY TRUCK OFF THE ROAD. I WAS LUCKY THAT I WAS ABLE TO STOP MY TRUCK WITHOUT HITTING THE VEHICLES WAITING FOR THE LIGHT. I WENT ONLINE TO REVIEW THIS AND FOUND THERE ARE NUMEROUS COMPLAINTS. ONE COMMENT FROM GM IS THAT THE VEHICLE WILL STOP IF A LINE RUPTURES. NOT TRUE. ALSO, SINCE WHEN ARE BRAKE LINES A MAINTENANCE ISSUE AND NOT A SAFETY ISSUE. MY MANUAL DOESN'T SAY REPLACE BRAKE LINES EVERY 20,00 MILES OR 5 YEARS. *TR
NHTSA ODI #10638621
90,767 miles · Sep 21, 2014
Service Brakes
WAS LEAVING A PAINTBALL FIELD PARKING LOT. WAS MOVING AT IDLE SPEED OF 5MPH AND WENT TO SLOW DOWN TO HEAR SOMEONE YELLING SOMETHING. PEDAL WENT TO THE FLOOR. I CONTINUED TO THE STOP SIGN AND THE PEDAL ONCE AGAIN WENT STRAIGHT TO THE FLOOR. I HAD TO DRIVE 23.5 MILES TO GET BACK HOME USING THE OLD SCHOOL METHOD OF DOWN SHIFTING AN…
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WAS LEAVING A PAINTBALL FIELD PARKING LOT. WAS MOVING AT IDLE SPEED OF 5MPH AND WENT TO SLOW DOWN TO HEAR SOMEONE YELLING SOMETHING. PEDAL WENT TO THE FLOOR. I CONTINUED TO THE STOP SIGN AND THE PEDAL ONCE AGAIN WENT STRAIGHT TO THE FLOOR. I HAD TO DRIVE 23.5 MILES TO GET BACK HOME USING THE OLD SCHOOL METHOD OF DOWN SHIFTING AND APPLYING THE LITTLE BIT OF BRAKES I HAD LEFT. ****VERY DANGEROUS**** ONCE I GOT HOME I CHECKED MY BRAKE RESERVOIR AND IT WAS HALF FULL. UNDER THE TRUCK INSPECTION SHOWED FLUID FROM THE DRIVERS DOOR ALL THE BACK TO THE REAR END. I COULD NOT SEE WHERE THE LEAK ORIGINATED FROM. WILL HAVE TO TAKE TO A MECHANIC AND PAY. *TR
NHTSA ODI #10637880
53,000 miles · Sep 11, 2014
Service Brakes
ISSUE WITH THE ABS BRAKES. SOMETIMES THE ABS KICKS IN AND DOESN'T ALLOW YOU TO STOP. *TR
NHTSA ODI #10632486
58,457 miles · Sep 4, 2014
Service Brakes
AT UNDER 60,000 MILES BOTH BRAKE LINES FROM MASTER CYLINDER WERE BADLY RUSTED. ONE LINE FAILED AND THE OTHER WAS IN IMMINENT DANGER OF FAILURE. THIS IS AN EXTREMELY DANGEROUS PROBLEM AND CHEVROLET HAS BEEN RESISTING A RECALL FOR YEARS. THIS TRUCK WAS DRIVEN MOSTLY IN A NON-SALTED ROADS STATE. IT IS UNACCEPTABLE TO HAVE BRAKE LIN…
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AT UNDER 60,000 MILES BOTH BRAKE LINES FROM MASTER CYLINDER WERE BADLY RUSTED. ONE LINE FAILED AND THE OTHER WAS IN IMMINENT DANGER OF FAILURE. THIS IS AN EXTREMELY DANGEROUS PROBLEM AND CHEVROLET HAS BEEN RESISTING A RECALL FOR YEARS. THIS TRUCK WAS DRIVEN MOSTLY IN A NON-SALTED ROADS STATE. IT IS UNACCEPTABLE TO HAVE BRAKE LINES RUSTED THROUGH IN UNDER 60,000 MILES. CHEVY TRIES TO CUT COSTS AND SAVE A FEW PENNIES ON A COMPONENT THAT IS CRITICAL TO LIFE SAFETY AND THEY REFUSE TO MAKE IT RIGHT WHEN THEIR COST-CUTTING SCHEME FAILS. MY SECOND AND LAST CHEVY. *TR
NHTSA ODI #10630830
93,000 miles · Aug 21, 2014
Service Brakes
PULLED OUT OF PARKING LOT AT LOW SPEED AND STOPPED TO WAIT FOR A RED LIGHT. WHILE STOPPED WITH FOOT ON BRAKE PEDAL, BRAKE PEDAL SUDDENLY DROPPED TO THE FLOOR. WHEN LIGHT TURNED GREEN I ACCELERATED SLOWLY AND TESTED THE BRAKES TO FIND THE STOPPING POWER OF THE VEHICLE REDUCED TO NEAR ZERO. PULLED OVER IN A SAFE AREA AFTER A FE…
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PULLED OUT OF PARKING LOT AT LOW SPEED AND STOPPED TO WAIT FOR A RED LIGHT. WHILE STOPPED WITH FOOT ON BRAKE PEDAL, BRAKE PEDAL SUDDENLY DROPPED TO THE FLOOR. WHEN LIGHT TURNED GREEN I ACCELERATED SLOWLY AND TESTED THE BRAKES TO FIND THE STOPPING POWER OF THE VEHICLE REDUCED TO NEAR ZERO. PULLED OVER IN A SAFE AREA AFTER A FEW BLOCKS AND INSPECTED VEHICLE TO FIND FLUID SPRAYED AROUND FRONT PASSENGER WHEEL WELL AND DRIPPING FROM BRAKE LINE. SUSPECT SUDDEN BRAKE LINE RUPTURE HAD OCCURRED. DECIDED VEHICLE WAS UNSAFE TO OPERATE AND PARKED IT AWAITING TOW. *TR
NHTSA ODI #10626941
Mileage unknown · Aug 13, 2014
Air BagsService BrakesCrashInjury
I OWN A 2002 CHEVROLET SILVERADO 1500. THE BRAKES FAILED WHILE ATTEMPTING TO STOP THE VEHICLE IN A 35MPH ZONE. THE BRAKES INITIALLY WORKED AND THEN THE PEDAL WENT TO THE FLOOR. I COULD FEEL THE ABS ENGAGE BUT NOT STOP HITTING A VEHICLE IN FRONT OF ME. WHEN I EXITED THE VEHICLE I COULD SMELL THE BRAKE FLUID AND OBSERVED FLUID LEA…
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I OWN A 2002 CHEVROLET SILVERADO 1500. THE BRAKES FAILED WHILE ATTEMPTING TO STOP THE VEHICLE IN A 35MPH ZONE. THE BRAKES INITIALLY WORKED AND THEN THE PEDAL WENT TO THE FLOOR. I COULD FEEL THE ABS ENGAGE BUT NOT STOP HITTING A VEHICLE IN FRONT OF ME. WHEN I EXITED THE VEHICLE I COULD SMELL THE BRAKE FLUID AND OBSERVED FLUID LEAKING FROM MULTIPLE LOCATIONS. THE AIR BAGS DID NOT DEPLOY. THE DRIVER OF THE VEHICLE SUSTAINED INJURIES. A POLICE REPORT WAS FILED. THE VEHICLE IS CURRENTLY BEING REPAIRED BY THE MANUFACTURES DEALER. *TR
NHTSA ODI #10622148
100,000 miles · Aug 5, 2014
Air BagsService BrakesCrashInjury
TL* THE CONTACT OWNED A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKES FAILED WHILE DRIVING DOWNHILL. AS A RESULT, THE VEHICLE WAS CRASHED INTO A TREE. THE AIR BAGS FAILED TO DEPLOY. THE DRIVER WAS INJURED AND THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOT NOTIFIED. THE SPEED WAS UNKNOWN. THE APPROXIMATE…
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TL* THE CONTACT OWNED A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE BRAKES FAILED WHILE DRIVING DOWNHILL. AS A RESULT, THE VEHICLE WAS CRASHED INTO A TREE. THE AIR BAGS FAILED TO DEPLOY. THE DRIVER WAS INJURED AND THE VEHICLE WAS DESTROYED. THE MANUFACTURER WAS NOT NOTIFIED. THE SPEED WAS UNKNOWN. THE APPROXIMATE FAILURE MILEAGE WAS 100,000.
NHTSA ODI #10618912
131,000 miles · Jul 22, 2014
Service Brakes
PEDAL WENT TO THE FLOOR, RUSTED BRAKE LINE, GOT TO REPLACE 3 OF THE LINES... *TR
NHTSA ODI #10615400
131,800 miles · Jul 20, 2014
Service Brakes
RUSTED BRAKE LINES CAUSED A NEAR ACCIDENT WHEN THE LINE BROKE, RESULTING IN LOSS OF BRAKING ABILITIES. *TR
NHTSA ODI #10614818
124,600 miles · Jul 18, 2014
Service Brakes
BRAKE LINES WERE HEAVILY CORRODED AND FAILED. NO WARNING SIGNS TO MAKE THIS PROBLEM IDENTIFIABLE OR EXPECTED. THE TRUCK WAS IMMEDIATELY UNSAFE TO DRIVE. BOTH THE FRONT AND REAR LINES BETWEEN THE MASTER CYLINDER AND ABS MODULE FAILED, CAUSING THE TRUCK TO HAVE NO BRAKING POWER WHATSOEVER. *TR
NHTSA ODI #10614647
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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