IllustrationBRAKE LINES RUSTED AND RUPTURED CAUSING VEHICLE TO LOSE BRAKING ABILITY. *TR
2000 Chevrolet Silverado 1500
Owner reports · Recalls · Investigations
Similar to other model years
Owner complaints for the 2000 Chevrolet Silverado 1500 do not stand out strongly from the model-year median of 525.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 1500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
210–25K
3725–50K
8050–75K
10275–100K
152100–150K
97150K+
489 reports with mileage · 125 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 237 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 162 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Structure. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
69 crash reports5 fire reports25 injury reports
Service Brakes complaints
162 reportsBRAKE LINE STARTED LEAKING WHILE DRIVING THROUGH A PARKING LOT. TOOK IT TO A GM DEALER TO HAVE IT REPAIRED AND HE SAID ALL THE BRAKE LINES WERE RUSTY AND NEEDED TO BE REPLACED. *TR
WHILE DRIVING ON SOUTH MINIVILLE ROAD IN PRINCE WILLIAM COUNTY VA, THE BRAKE PEDDLE WENT FROM WORKING FINE AND THEN STRAIGHT TO THE FLOOR. ITS WAS LUCKY THAT TRAFFIC WAS LIGHT BECAUSE I WOULDN'T HAVE BEEN ABLE TO STOP. THIS IS VERY COMMON PROBLEM WITH THESE TRUCKS AND SOMETHING CHEVY SHOULD BE RESPONSIBLE FOR FIXING. *TR
PEDAL WENT TO THE FLOOR WHILE DRIVING SUDDENLY. BRAKES LINES RUSTED THROUGH. BROUGHT TO DEALER TO FIX 9/17/13/. HAD TO RETURN VEHICLE TO DEALERSHIP AND INFORM THEM TO REPLACE ALL BRAKE LINES AS THEY ARE ALL RUSTED THROUGH, THEY WERE NOT AWARE OF THE GM ISSUE (I FOUND THE ISSUE ONLINE) . THEY HAD ONLY REPAIRED REAR LINES AND DID…
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PEDAL WENT TO THE FLOOR WHILE DRIVING SUDDENLY. BRAKES LINES RUSTED THROUGH. BROUGHT TO DEALER TO FIX 9/17/13/. HAD TO RETURN VEHICLE TO DEALERSHIP AND INFORM THEM TO REPLACE ALL BRAKE LINES AS THEY ARE ALL RUSTED THROUGH, THEY WERE NOT AWARE OF THE GM ISSUE (I FOUND THE ISSUE ONLINE) . THEY HAD ONLY REPAIRED REAR LINES AND DIDN'T BRING THE LINE TO THE FRONT, JOINED IT TO OLD LINE WITH UNION. LEAKED AGAIN IN MY DRIVEWAY ON 10/1/13 . BROUGHT IN 10/4/13 INSISTED ON TOTAL BRAKE LINE REPLACEMENT. REQUESTED THE GM OFFERED KIT $500.00 FOR THIS PURPOSE THAT GM AS OFFERED TO OWNERS AND DEALERS ABOUT THIS PROBLEM . REQUESTED DEALERSHIP CREDIT THE PRIOR BANDAID WORK IT DID. *TR
DRIVING IN A NORMAL SITUATION, BRAKING TO GET OVER INTO TURN LANE AND THE BRAKES WENT RIGHT TO THE FLOOR. FOUND BRAKE LINES UNDER LEFT FRONT OF CAB RUSTED THROUGH CAUSING COMPLETE BRAKING SYSTEM TO LOSE PRESSURE. FORTUNATELY I WAS NOT IN A CRITICAL SITUATION BECAUSE I LOST ALL BRAKING POWER, VERY SCARY. *TR
LUCKILY I WAS SITTING STILL AT A STOP LIGHT. THE PEDAL JUST DROPPED TO THE FLOOR BOARD. IT WASN'T UNTIL AFTER SEVERAL ATTEMPTS TO PUMP THE BRAKES BACK UP THAT A WARNING LIGHT EVEN CAME ON. UPON INSPECTION THE HARD LINE SUPPLYING THE REAR BRAKES HAD RUSTED THROUGH AND CAUSED THE BRAKES TO FAIL. ALSO CONTRARY TO OTHER REPORTS…
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LUCKILY I WAS SITTING STILL AT A STOP LIGHT. THE PEDAL JUST DROPPED TO THE FLOOR BOARD. IT WASN'T UNTIL AFTER SEVERAL ATTEMPTS TO PUMP THE BRAKES BACK UP THAT A WARNING LIGHT EVEN CAME ON. UPON INSPECTION THE HARD LINE SUPPLYING THE REAR BRAKES HAD RUSTED THROUGH AND CAUSED THE BRAKES TO FAIL. ALSO CONTRARY TO OTHER REPORTS I HAVE HEARD THE ENTIRE BRAKE SYSTEM FAILED, NOT JUST THE REAR BRAKES. *JS
BACKED UP OUT OF TURNAROUND. DROVE TO END OF DRIVEWAY AND STOPPED. TURNED LEFT OUT OF DRIVEWAY AND ACCELERATED UP TO SPEED. DROVE ABOUT A MILE AND APPROACHED CROSSROAD TO TURN RIGHT. STARTED TO SLOW DOWN AND THE BRAKE PEDAL WENT TO THE FLOOR SO I PUMPED IT AND HAD NOTHING WITH NO WARNING LIGHTS. LUCKILY THERE WAS NOBODY AT THE C…
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BACKED UP OUT OF TURNAROUND. DROVE TO END OF DRIVEWAY AND STOPPED. TURNED LEFT OUT OF DRIVEWAY AND ACCELERATED UP TO SPEED. DROVE ABOUT A MILE AND APPROACHED CROSSROAD TO TURN RIGHT. STARTED TO SLOW DOWN AND THE BRAKE PEDAL WENT TO THE FLOOR SO I PUMPED IT AND HAD NOTHING WITH NO WARNING LIGHTS. LUCKILY THERE WAS NOBODY AT THE CROSSROAD AND I WENT PAST IT AND MANAGED TO COME TO A STOP DOWN THE ROAD. MY MECHANIC FOUND THAT A RUSTED BRAKE LINE HAD BURST NEAR THE PROPORTIONING VALVE LOCATED UNDER THE DRIVERS DOOR. ALL THE BRAKE LINES WERE RUSTED AND NEEDED REPLACED. I FOUND THROUGH RESEARCH THAT THIS A VERY COMMON EVENT IN THESE VEHICLES. THE OWNERS OF THIS TYPE OF VEHICLE SHOULD AT LEAST BE WARNED BEFORE SERIOUS INJURIES OR WORSE SINCE THERE ARE STILL MANY ON THE ROADS. THIS POOR DESIGN AND USE OF INFERIOR MATERIALS SHOULD NOT HAPPEN ON SUCH AN IMPORTANT PART OF VEHICLE SAFETY. *TR
DRIVING HOME FROM A MORNING OF SHOPPING, I WENT TO STOP TO MAKE A TURN INTO WALGREEN'S PARKING LOT WHEN I NOTICED THE TRUCK WAS DIFFICULT TO STOP.. I PROCEEDED TO MAKE A PURCHASE AT WALGREEN'S, BUT WHEN I WAS FINISHED I DECIDED TO LOOK UNDER THE HOOD. I COULD SMELL AN ODOR THAT SMELLED LIKE BRAKE FLUID, BUT WASN'T SURE BECAUSE T…
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DRIVING HOME FROM A MORNING OF SHOPPING, I WENT TO STOP TO MAKE A TURN INTO WALGREEN'S PARKING LOT WHEN I NOTICED THE TRUCK WAS DIFFICULT TO STOP.. I PROCEEDED TO MAKE A PURCHASE AT WALGREEN'S, BUT WHEN I WAS FINISHED I DECIDED TO LOOK UNDER THE HOOD. I COULD SMELL AN ODOR THAT SMELLED LIKE BRAKE FLUID, BUT WASN'T SURE BECAUSE THE CONTAINER WAS STILL AT AN ACCEPTABLE LEVEL. I PROCEEDED TO DRIVE THE TRUCK HOME, APPROXIMATELY A HALF A MILE, AND NOTICED THE BRAKE PEDAL DOWN TO THE FLOOR. UPON ARRIVING AT HOME, I CHECKED UNDER THE HOOD AGAIN, AND NOTICED BRAKE FLUID ON THE EXHAUST PIPE ON THE DRIVER'S SIDE. I COULD SEE A BREAK IN THE BRAKE LINE ABOVE THE EXHAUST PIPE AND NOTICED VAPORS COMING OFF THE PIPE. THE TRUCK HAS ONLY 60,000 MILES ON, SO I WAS VERY CONCERNED ABOUT THE QUALITY OF THE MATERIALS USED FOR INSURING PEOPLE'S LIVES WITH THESE INFERIOR LINES. THE TRUCK WAS TOWED TO A CHEVY DEALERSHIP, AND WAS TOLD THE COST COULD BE IN THE NEIGHBORHOOD OF 1800 DOLLARS. IS THIS WHERE OUR QUALITY MANUFACTURING HAS TAKEN US? NO WONDER THE JAPANESE ARE WINNING. *TR
HAD TO STOP AT A RED LIGHT ON A HILL. BRAKE PEDAL WENT TO FLOOR NO BRAKES.HAD TO USE EMERGENCY BRAKE TO STOP. HAD BRAKE LINE TO REAR REPLACED.3 YEARS LATER (TODAY) BRAKE LINE TO FRONT FAILED RUSTED. THERE ARE SEVERAL BRAKE LINES ON THIS TRUCK THEY ARE ALL SEVERELY RUSTED AN NEED REPAIR. I AM IN THE AUTOBODY REPAIR BUSINESS AND H…
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HAD TO STOP AT A RED LIGHT ON A HILL. BRAKE PEDAL WENT TO FLOOR NO BRAKES.HAD TO USE EMERGENCY BRAKE TO STOP. HAD BRAKE LINE TO REAR REPLACED.3 YEARS LATER (TODAY) BRAKE LINE TO FRONT FAILED RUSTED. THERE ARE SEVERAL BRAKE LINES ON THIS TRUCK THEY ARE ALL SEVERELY RUSTED AN NEED REPAIR. I AM IN THE AUTOBODY REPAIR BUSINESS AND HAVE SEEN THIS PROBLEM ON ALMOST ALL SILVERADOS 6 YEARS AND OLDER . STARTING 1999 AND UP. *TR
BACKING UP TO LAUNCH BOAT ON RAMP AND BRAKE PEDAL WENT TO THE FLOOR. DROVE TRUCK 2 BLOCKS TO HOUSE USED EMERGENCY BRAKE TO STOP. SAW BRAKE FLUID ON THE ROAD. BRAKE LINES ARE SEVERELY CORRODED AND ONE HAS FAILED. MASTER CYLINDER HAS LOST ALL FLUID. *JS
Official recalls
0No 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
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.