NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
147 reportsClear category filter60,000 miles · Aug 3, 2011
Fuel System, GasolineService Brakes, HydraulicStructure
2001 CHEVY SILVERADO 4 DOOR EXTRA CAB , BRAKE FAILURE TWO MONTHS AGO FROM BRAKE LINE RUPTURE OF HEAVILY RUSTED STEEL BRAKE LINE,LOCATED ABOVE GAS TANK. CLOSE INSPECTION REVEALED FRAME AND OTHER BRAKE AND GAS LINES, ROTORS, BRAKE ROTOR SHIELDS, EMERGENCY BRAKE CABLES BADLY RUSTED! NO REPAIRS MADE YET. 60,000 MILES ON TRUCK. B…
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2001 CHEVY SILVERADO 4 DOOR EXTRA CAB , BRAKE FAILURE TWO MONTHS AGO FROM BRAKE LINE RUPTURE OF HEAVILY RUSTED STEEL BRAKE LINE,LOCATED ABOVE GAS TANK. CLOSE INSPECTION REVEALED FRAME AND OTHER BRAKE AND GAS LINES, ROTORS, BRAKE ROTOR SHIELDS, EMERGENCY BRAKE CABLES BADLY RUSTED! NO REPAIRS MADE YET. 60,000 MILES ON TRUCK. BODY EXCEPT FOR ROCKER PANELS AND REAR BUMPER IS EXCELLENT ! BOTTOM OF TRUCK PRESSURE FLUSHED WEEKLY DURING WINTER AND SPRING SINCE 2002. FAILURE WHEN IN MY DRIVEWAY, WILL REPLACE SECTION OF LINE WITH LEAK THIS WEEK. IS TRUCK SAFE TO DRIVE? *KB
NHTSA ODI #10416984
70,000 miles · Jul 31, 2011
Service Brakes, Hydraulic
ON JULY 30TH, 2011 AT ABOUT 22:00 HRS, I WAS OPERATING MY 2001 CHEVROLET SILVERADO ON INTERSTATE 476 IN THE PHILADELPHIA METRO AREA AND INITIALLY IT WAS FUNCTIONING PROPERLY. WITHOUT WARNING A CATASTROPHIC BRAKE LINE RUPTURE OCCURRED. I INSPECTED THE STEEL LINES AND THEY ARE ALL CORRODED TO AN ALARMING DEGREE AND MUST BE REPL…
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ON JULY 30TH, 2011 AT ABOUT 22:00 HRS, I WAS OPERATING MY 2001 CHEVROLET SILVERADO ON INTERSTATE 476 IN THE PHILADELPHIA METRO AREA AND INITIALLY IT WAS FUNCTIONING PROPERLY. WITHOUT WARNING A CATASTROPHIC BRAKE LINE RUPTURE OCCURRED. I INSPECTED THE STEEL LINES AND THEY ARE ALL CORRODED TO AN ALARMING DEGREE AND MUST BE REPLACED. THE TRUCK HAS 70,000 MILES AND AFTER USE DURING THE SAME TRIP WITH NO PROBLEMS WHEN THE BRAKE PEDAL SUNK TO THE FLOOR. TO SAFELY STOP I HAD TO DOWN SHIFT TO A LOWER GEAR, AND USE THE EMERGENCY BRAKE AND SHIFT AGAIN TO NEUTRAL TO STOP SAFELY. *TR
NHTSA ODI #10416389
48,000 miles · Jul 18, 2011
Service Brakes, Hydraulic
EXPERIENCED BRAKE FAILURE DUE TO CORRODED BRAKE LINES FORM THE MASTER CYLINDER TO ABS UNIT. THE BRAKES FAILED WHILE ATTEMPTING TO STOP AT RED LIGHT ON A MAJOR HIGHWAY, CAUSING THE TRUCK TO ENTER THE INTERSECTION. BOTH MAIN LINES BLEW CAUSING TOTAL BRAKE FAILURE. ANY VEHICLE IN THE NORTH EAST REGION (USA) SHOULD COME STOCK WITH…
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EXPERIENCED BRAKE FAILURE DUE TO CORRODED BRAKE LINES FORM THE MASTER CYLINDER TO ABS UNIT. THE BRAKES FAILED WHILE ATTEMPTING TO STOP AT RED LIGHT ON A MAJOR HIGHWAY, CAUSING THE TRUCK TO ENTER THE INTERSECTION. BOTH MAIN LINES BLEW CAUSING TOTAL BRAKE FAILURE. ANY VEHICLE IN THE NORTH EAST REGION (USA) SHOULD COME STOCK WITH STAINLESS STEEL BRAKE LINES, AS TO PREVENT SUCH PREMATURE CORROSION.
NHTSA ODI #10414299
51,000 miles · Jul 10, 2011
Service Brakes, Hydraulic
I WAS APPROACHING A STOP SIGN AT ABOUT 45 MPH I APPLIED THE BRAKES TO SLOW DOWN AND THERE WAS NOTHING, I HIT THE EMERGENCY BRAKE AND REALIZED THEY NEVER WORKED. LUCKILY, I COULD SLOW DOWN AND PUT IT IN LOW RANGE UNTIL IT STOPPED. FURTHER INVESTIGATION SHOWED A RUPTURE IN THE REAR BRAKE LINE DUE TO CORROSION. DEALER REPLACED LINE…
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I WAS APPROACHING A STOP SIGN AT ABOUT 45 MPH I APPLIED THE BRAKES TO SLOW DOWN AND THERE WAS NOTHING, I HIT THE EMERGENCY BRAKE AND REALIZED THEY NEVER WORKED. LUCKILY, I COULD SLOW DOWN AND PUT IT IN LOW RANGE UNTIL IT STOPPED. FURTHER INVESTIGATION SHOWED A RUPTURE IN THE REAR BRAKE LINE DUE TO CORROSION. DEALER REPLACED LINE (SHABBY JOB) AT A HUGE COST. I FEEL THESE LINES SHOULD HAVE LASTED LONGER THAT THIS, I NOTICED THE LINES AT THE FRONT SPLITTER ARE ALSO SEVERELY CORRODED, I AM AFRAID TO PUT MY GRANDKIDS IN THIS TRUCK. I HAVE ALWAYS OWNED CHEVY'S BUT MAYBE ITS TIME FOR A CHANGE. ALL I ASK IS THIS PROBLEM BE CORRECTED. THANK YOU.
NHTSA ODI #10412542
179,000 miles · Jul 7, 2011
Service Brakes, Hydraulic
THE ABS SENSOR ON BOTH SIDES OF MY 2001 SILVERADO WENT OUT, THIS CAUSES YOUR BRAKES TO BE SOFT AND NOT STOP AT SLOW SPEEDS. ALTHOUGH THERE IS A RECALL ON THESE VEHICLES, MINE IS NOT INCLUDED. I HAD TO PAY 725 JUST TO REPAIR ONE SIDE. CHEVY KNOWS THESE PARTS ARE DEFECTIVE AND THEY WONT DO ANYTHING ABOUT IT. *TR
NHTSA ODI #10410958
153,402 miles · Jun 22, 2011
Service Brakes, HydraulicCrash
MY BRAKES ARE BEGINNING TO FAIL WHEN MAKING SHARP TURNS. NOTICEABLE WHEN TURNING INTO PARKING SPACES. I HIT THE BACK OF A PARKED VEHICLE THIS WEEKEND BECAUSE OF IT AND NOW I'M AFRAID TO DRIVE MY TRUCK. WHEN THE SHARP TURN IS MADE (IN EITHER DIRECTION) THE ABS KICKS IN AND THE PEDAL BEGINS TO VIBRATE THEN GOES TO THE FLOOR. THE V…
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MY BRAKES ARE BEGINNING TO FAIL WHEN MAKING SHARP TURNS. NOTICEABLE WHEN TURNING INTO PARKING SPACES. I HIT THE BACK OF A PARKED VEHICLE THIS WEEKEND BECAUSE OF IT AND NOW I'M AFRAID TO DRIVE MY TRUCK. WHEN THE SHARP TURN IS MADE (IN EITHER DIRECTION) THE ABS KICKS IN AND THE PEDAL BEGINS TO VIBRATE THEN GOES TO THE FLOOR. THE VEHICLE IS A 2001 CHEVY SILVERADO 1500, 4 WHEEL DRIVE. ON 6/21/2011 I CALLED CHEVROLET TO REPORT THIS PROBLEM AND ASK FOR HELP AND THEY WOULD NOT BECAUSE A RECALL HAD NOT BEEN MADE. I FOUND OTHER RECALLS ONLINE STATING THIS SAME KIND OF PROBLEM; (NHTSA RECALL CAMPAIGN ID NUMBER 05V379000) I WOULD LIKE FOR YOU TO ISSUE A RECALL AS SOON AS POSSIBLE SO I CAN BE REIMBURSED FOR THE REPAIRS I AM GOING TO HAVE TO MAKE RIGHT NOW TO MAKE MY VEHICLE SAFE TO DRIVE. *TR
NHTSA ODI #10408451
167,726 miles · Jun 21, 2011
Service Brakes, Hydraulic
RUSTED THROUGH STEEL BRAKE LINES FAILED TODAY AS I WAS BRAKING THE LINES RUPTURED AND I LOST BRAKES. AT FRAME MOUNT LOCATION AT REAR LEFT WHEEL AND ALSO AT PROPORTIONING ABS BLOCK ON FRAME RAIL BELOW DRIVERS SEAT NOTHING DONE TO REPAIR YET SITTING IN MY DRIVEWAY AFTER BEING TOWED HOME. *TR
NHTSA ODI #10407766
107,400 miles · Jun 13, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 15 TO 20 MPH AND DEPRESSING THE BRAKES WHEN THE ANTI-LOCK BRAKES ACTIVATED ABNORMALLY, CAUSING THE REAR BRAKE LINE TO FRACTURE. THE VEHICLE WAS THEN TOWED AND REPAIRED BY THE OWNER FOR THE FRONT AND REAR HUB ASSEMBLIES. THE MANUFACTURER W…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 15 TO 20 MPH AND DEPRESSING THE BRAKES WHEN THE ANTI-LOCK BRAKES ACTIVATED ABNORMALLY, CAUSING THE REAR BRAKE LINE TO FRACTURE. THE VEHICLE WAS THEN TOWED AND REPAIRED BY THE OWNER FOR THE FRONT AND REAR HUB ASSEMBLIES. THE MANUFACTURER WAS CONTACTED AND OFFERED NO ASSISTANCE. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 107,400. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10406200
89,000 miles · Apr 17, 2011
Service Brakes, Hydraulic
BRAKE FAILURE. *TR
NHTSA ODI #10396543
157,000 miles · Mar 24, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE FRONT AND REAR BRAKES WERE RUSTED FROM THE BRAKE LINE TO THE ABS CONTROL UNIT. THE VEHICLE WAS NOT TAKEN TO THE DEALER OR AN INDEPENDENT MECHANIC FOR REPAIRS OR DIAGNOSIS. THE FAILURE MILEAGE WAS 157,000 AND THE CURRENT MILEAGE WAS 158,000.
NHTSA ODI #10392789
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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