NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
222 reportsClear category filter102,000 miles · Jul 9, 2010
Service Brakes, Hydraulic
HIT BRAKES HARD BECAUSE TRAFFIC NO BRAKES. I MISSED THE CAR IN FRONT AND WAS ABLE TOO EXIT EXPRESS WAY WITH MY WIFE & 3 YOUNG ADULTS (MY SON & TWO DAUGHTER IN THE BACK SEAT. IT BLEW UNDER MY DRIVERS SEAT . WHEN I WENT TO REPAIR ALL BRAKE LINES NEEDS TO BE REPLACED. PLUS THE MORE I LOOK ON-LINE AND PEOPLE I TALK TOO EVERYONE IS H…
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HIT BRAKES HARD BECAUSE TRAFFIC NO BRAKES. I MISSED THE CAR IN FRONT AND WAS ABLE TOO EXIT EXPRESS WAY WITH MY WIFE & 3 YOUNG ADULTS (MY SON & TWO DAUGHTER IN THE BACK SEAT. IT BLEW UNDER MY DRIVERS SEAT . WHEN I WENT TO REPAIR ALL BRAKE LINES NEEDS TO BE REPLACED. PLUS THE MORE I LOOK ON-LINE AND PEOPLE I TALK TOO EVERYONE IS HAVING THE SAME PROBLEM. BODY&FRAME RUST ,WHAT CAN I DO? *TR
NHTSA ODI #10342341
83,600 miles · Jun 28, 2010
Service Brakes, Hydraulic
1999 SILVERADO 1500 4WD TRUCK WITH RUSTING BRAKE LINES. *TR
NHTSA ODI #10340466
58,491 miles · Jun 21, 2010
Service Brakes, Hydraulic
THERE IS AN ISSUE WITH THE BRAKE SYSTEM ON THE 2001 CHEVROLET SILVERADO PICK-UP THAT CHEVROLET HAS FAILED TO ADDRESS SATISFACTORILY. THE TRUCKS WERE RECALLED DUE TO AN ISSUE WITH THE SPEED SENSOR THAT WOULD CAUSE THE BRAKES TO FAIL. IN 2005 CHEVROLET RECALLED THE TRUCKS FOR THIS ISSUE AND SUPPOSEDLY PUT RUST PROTESTANT ON THE SP…
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THERE IS AN ISSUE WITH THE BRAKE SYSTEM ON THE 2001 CHEVROLET SILVERADO PICK-UP THAT CHEVROLET HAS FAILED TO ADDRESS SATISFACTORILY. THE TRUCKS WERE RECALLED DUE TO AN ISSUE WITH THE SPEED SENSOR THAT WOULD CAUSE THE BRAKES TO FAIL. IN 2005 CHEVROLET RECALLED THE TRUCKS FOR THIS ISSUE AND SUPPOSEDLY PUT RUST PROTESTANT ON THE SPEED SENSOR TO PROTECT IT FROM FAILING. IN 2010 I WAS NEARLY INVOLVED IN A TRAFFIC CRASH WHEN MY BRAKES FAILED. THE DEALERSHIP ADVISED THAT THE SPEED SENSOR WENT BAD. I CONTACTED CHEVROLET AND THEY FAILED TO PROPERLY ADDRESS THIS SITUATION. IN DOING RESEARCH I FOUND THAT THIS IS NOT AN ISOLATED INCIDENT AND NEEDS TO BE ADDRESSED BEFORE SOMEONE IS KILLED OR INJURED AS A RESULT OF FAULTY BRAKES. *TR
NHTSA ODI #10339276
103,000 miles · Jun 19, 2010
Service Brakes, Hydraulic
1999 CHEVROLET SILVERADO 1500 4WD STANDARD CAB 4.3 V-6 -FAILURE IN BRAKE LINE , I WAS STOPPED IN LINE AT DRIVE THRU AND FELT BRAKE PEDAL GO DOWN AND HEARD BREAK FLUID SQUIRT FROM LINE, INVESTIGATED PROBLEM AND FOUND A HOLE IN LINE DUE TO RUST , LOCATION OF PROBLEM WAS BELOW DRIVERS DOOR WHERE LINE RUNS ALONG FRAME, WILL HAVE TO…
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1999 CHEVROLET SILVERADO 1500 4WD STANDARD CAB 4.3 V-6 -FAILURE IN BRAKE LINE , I WAS STOPPED IN LINE AT DRIVE THRU AND FELT BRAKE PEDAL GO DOWN AND HEARD BREAK FLUID SQUIRT FROM LINE, INVESTIGATED PROBLEM AND FOUND A HOLE IN LINE DUE TO RUST , LOCATION OF PROBLEM WAS BELOW DRIVERS DOOR WHERE LINE RUNS ALONG FRAME, WILL HAVE TO REPLACE LINE, WILL KEEP OLD LINE FOR INSPECTION IF NEEDED. *TR
NHTSA ODI #10339107
70,693 miles · May 14, 2010
Service Brakes, Hydraulic
1999 CHEVY SILVERADO P/U HAD RUSTY BRAKE LINES CAUSING TOTAL BRAKE FAILURE. SPENT OVER $5000 AT DEALER TO CORRECT PROBLEM. ALL HYDRAULIC LINES HAD TO BE REPLACED. GM REFUSED TO REIMBURSE ME FOR ANY OF THE REPAIRS OR REPAIR BRAKES TO MY SATISFACTION. *TR
NHTSA ODI #10330404
140,000 miles · Apr 23, 2010
Service Brakes, Hydraulic
I OWN A 1999 SILVERADO EXTENDED CAB 2WD LS PICKUP TRUCK. I NEARLY RAN THROUGH MY PARENTS GARAGE WHEN THE BRAKE LINE SUDDENLY RUPTURED AND LEAKED. UPON FURTHER INVESTIGATION ALL THE LINES ARE TERRIBLY CORRODED AND RUSTED TO A POINT OF BEING BRITTLE( EVEN LINES UNDER THE HOOD WHERE THEY ARE TYPICALLY PROTECTED) I WAS HAPPY THA…
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I OWN A 1999 SILVERADO EXTENDED CAB 2WD LS PICKUP TRUCK. I NEARLY RAN THROUGH MY PARENTS GARAGE WHEN THE BRAKE LINE SUDDENLY RUPTURED AND LEAKED. UPON FURTHER INVESTIGATION ALL THE LINES ARE TERRIBLY CORRODED AND RUSTED TO A POINT OF BEING BRITTLE( EVEN LINES UNDER THE HOOD WHERE THEY ARE TYPICALLY PROTECTED) I WAS HAPPY THAT I WAS NOT ON THE HIGHWAY WHEN THIS OCCURRED. I HAVE SINCE CHANGED THE MAIN LINE TO THE REAR OF THE TRUCK WITH A BETTER QUALITY LINE AND AM WAITING TO DO THE BALANCE BUT AM UNEASY AND WILL PROBABLY HAVE TO JUST DO THEM. THIS TRUCK ALSO HAD RUSTY TRANSMISSION LINES THAT CAUSED TRANSMISSION FAILURE SINCE I DID NOT CATCH IT IN TIME WHEN THE LINE ROTTED OUT. WHAT IS GOING ON WHEN A COMPANY CANT PUT QUALITY MATERIALS IN A SYSTEM CRITICAL PART? THE REAR PLATES THAT SHIELD THE PARKING BRAKE COMPLETERUSTED AND FELL OFF. *TR
NHTSA ODI #10327141
126,000 miles · Apr 22, 2010
Service Brakes, Hydraulic
I OWN A 1999 CHEVY SILVERADO. I WAS GOING AROUND A BLIND DOWN HILL TURN, WHEN I GOT AROUND THE TURN THERE WAS A CAR COMPLETELY ON MY SIDE OF THE ROAD. I SLAMMED ON THE BRAKES, THE TRUCK SLOWED BUT DID NOT STOP, AND THE BRAKE PEDAL WENT TO THE FLOOR. AFTER I WAS ABLE TO STOP THE TRUCK, I FOUND THAT THE STEEL BRAKE LINE RUNNING AL…
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I OWN A 1999 CHEVY SILVERADO. I WAS GOING AROUND A BLIND DOWN HILL TURN, WHEN I GOT AROUND THE TURN THERE WAS A CAR COMPLETELY ON MY SIDE OF THE ROAD. I SLAMMED ON THE BRAKES, THE TRUCK SLOWED BUT DID NOT STOP, AND THE BRAKE PEDAL WENT TO THE FLOOR. AFTER I WAS ABLE TO STOP THE TRUCK, I FOUND THAT THE STEEL BRAKE LINE RUNNING ALONG THE FRAME HAD RUPTURED. THE LOCATION OF THE RUPTURE WAS UNDER THE DRIVERS SIDE DOOR. I TOOK THE TRUCK TO MY LOCAL CHEVY DEALER AND HAD THE LINE REPLACED. *TR
NHTSA ODI #10326975
140,000 miles · Apr 21, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING AND HAULING A TRAILER AT APPROXIMATELY 35 MPH, THE CONTACT DEPRESSED THE BRAKE PEDAL BUT THE BRAKES DID NOT ENGAGE SO THE VEHICLE WENT THROUGH A RED TRAFFIC LIGHT. THE CONTACT NOTICED THE BRAKE LINE SEEMED COMPLETELY RUSTED. THE VEHICLE HAD NOT BEEN REPAIRED AT T…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING AND HAULING A TRAILER AT APPROXIMATELY 35 MPH, THE CONTACT DEPRESSED THE BRAKE PEDAL BUT THE BRAKES DID NOT ENGAGE SO THE VEHICLE WENT THROUGH A RED TRAFFIC LIGHT. THE CONTACT NOTICED THE BRAKE LINE SEEMED COMPLETELY RUSTED. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE CURRENT AND FAILURE MILEAGES WERE APPROXIMATELY 140,000.
NHTSA ODI #10326776
53,000 miles · Apr 19, 2010
Service Brakes, Hydraulic
THE BRAKES FAILED ON MY 1999 CHEVROLET SILVERADO RECENTLY. A MECHANIC REPLACED ALL BRAKE LINES DUE TO CORROSION. *TR
NHTSA ODI #10326291
62,000 miles · Apr 19, 2010
Service Brakes, Hydraulic
MY 1999 CHEVY SILVERADO 1500 4WD (PURCHASED NEW BY ME) HAS HAD MULTIPLE CORROSION/RUST BRAKE LINE FAILURES THAT FIRST BEGAN WHEN THE VEHICLE WAS ONLY THREE YEARS OLD. ONE EVENT LEFT ME DESPERATE AS THE FAILURE OCCURRED WHEN BACKING MY 8,000LB BOAT DOWN A STEEP BOAT RAMP INTO THE WATER. THE ABS MODULE ALSO FAILED TO OPERATE WHEN …
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MY 1999 CHEVY SILVERADO 1500 4WD (PURCHASED NEW BY ME) HAS HAD MULTIPLE CORROSION/RUST BRAKE LINE FAILURES THAT FIRST BEGAN WHEN THE VEHICLE WAS ONLY THREE YEARS OLD. ONE EVENT LEFT ME DESPERATE AS THE FAILURE OCCURRED WHEN BACKING MY 8,000LB BOAT DOWN A STEEP BOAT RAMP INTO THE WATER. THE ABS MODULE ALSO FAILED TO OPERATE WHEN ONLY TWO YEARS OLD. ALL OF THIS HAS LED TO EXTREMELY EXPENSIVE REPAIRS AND MODIFICATIONS AT MY EXPENSE. MY TRUCK WAS NOT INCLUDED IN THE PREVIOUS RUST BELT STATES RECALL AS I LIVE IN VIRGINIA. *TR
NHTSA ODI #10326283
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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