NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
222 reportsClear category filter35,358 miles · Jul 6, 2011
Service Brakes, Hydraulic
I OWN A 1999 CHEVY SILVERADO 1500 THAT HAS ABOUT 35,000 MILES ON IT. VIN# [XXX]. PULLING A TRAILER WITH A BOAT AND GOING DOWN A HILL, THE BRAKE PEDAL WENT TO THE FLOOR. FORTUNATELY, I WAS ABLE TO BACK UP. I FOUND THAT THE BRAKE LINE HAD RUSTED THROUGH. LOOKING AT ALL THE BRAKE LINES, I FIND THERE IS A TREMENDOUS AMOUNT OF R…
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I OWN A 1999 CHEVY SILVERADO 1500 THAT HAS ABOUT 35,000 MILES ON IT. VIN# [XXX]. PULLING A TRAILER WITH A BOAT AND GOING DOWN A HILL, THE BRAKE PEDAL WENT TO THE FLOOR. FORTUNATELY, I WAS ABLE TO BACK UP. I FOUND THAT THE BRAKE LINE HAD RUSTED THROUGH. LOOKING AT ALL THE BRAKE LINES, I FIND THERE IS A TREMENDOUS AMOUNT OF RUST ON ALL THE LINES. THIS IS A SAFETY PROBLEM. IF I HAD BEEN IN OTHER CIRCUMSTANCES THE FAILURE WOULD HAVE LED TO SERIOUS CONSEQUENCES OF HUMAN LIFE. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10410636
130,670 miles · Jul 3, 2011
Service Brakes, Hydraulic
0PULLED INTO A SHOPPING CENTER PARKING LOT FROM HIGHWAY. DROVE APPROXIMATELY100FT., WHEN THE BRAKES WERE APPLIED THE BRAKE PEDAL WENT TO FLOORBOARD. I WAS ABLE TO SLOW DOWN AND PULL INTO A PARKING SPACE AND STOP. LOOKED FOR ANY SIGNS OF LEAKING BRAKE FLUID BUT DID NOT SEE ANY. I WAS ABLE TO MAKE IT HOME (ABOUT 2 MILES). UPON …
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0PULLED INTO A SHOPPING CENTER PARKING LOT FROM HIGHWAY. DROVE APPROXIMATELY100FT., WHEN THE BRAKES WERE APPLIED THE BRAKE PEDAL WENT TO FLOORBOARD. I WAS ABLE TO SLOW DOWN AND PULL INTO A PARKING SPACE AND STOP. LOOKED FOR ANY SIGNS OF LEAKING BRAKE FLUID BUT DID NOT SEE ANY. I WAS ABLE TO MAKE IT HOME (ABOUT 2 MILES). UPON ARRIVING HOME I NOTICED LARGE AMOUNTS OF BRAKE FLUID IN THE RIGHT FRONT FENDER WELL AND ENGINE COMPARTMENT. UPON LOOKING FURTHER AND WIPING DOWN EXCESS BRAKE FLUID I NOTICED A HEAVY DRIP FROM STEEL BRAKELINE NEXT TO RADIATOR. HAVE NOT REPAIRED. *TR
NHTSA ODI #10410346
131,000 miles · Jun 13, 2011
Service Brakes, HydraulicCrash
FAILURE OF BRAKE LINE FEEDING REAR BRAKES. RUSTED THROUGH. THIS IS THE 2ND FAILURE. *TR
NHTSA ODI #10406216
160,000 miles · Jun 10, 2011
Service Brakes, HydraulicCrash
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 45 MPH THE CONTACT APPLIED THE BRAKES AND THE PEDAL DEPRESSED TO THE FLOOR. AS A RESULT, THE CONTACT CRASHED INTO THE VEHICLE IN FRONT OF HIM. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A COLLISION REPAIR SHOP. THE TECHNICIANS STATED THAT T…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE DRIVING APPROXIMATELY 45 MPH THE CONTACT APPLIED THE BRAKES AND THE PEDAL DEPRESSED TO THE FLOOR. AS A RESULT, THE CONTACT CRASHED INTO THE VEHICLE IN FRONT OF HIM. A POLICE REPORT WAS FILED. THE VEHICLE WAS TOWED TO A COLLISION REPAIR SHOP. THE TECHNICIANS STATED THAT THE BRAKE LINE NEEDED TO BE REPLACED DUE TO CORROSION. THERE WAS AN OPEN INVESTIGATION UNDER NHTSA ACTION NUMBER: EA11001 (SERVICE BRAKES, HYDRAULIC SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:HOSES, LINES/PIPING, AND FITTINGS) THAT MAY BE RELATED TO THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 160,000. THE VIN WAS NOT AVAILABLE.
NHTSA ODI #10405852
113,052 miles · Jun 3, 2011
Service Brakes, Hydraulic
ON THE EVENING OF MAY 31ST I WAS DRIVING OUT A 2 LANE ROAD AT APPROX 40 MPH FOLLOWING ANOTHER VEHICLE. THE OTHER VEHICLE DID A "PANIC BRAKE" AND SWERVED TO MISS A DEER IN THE ROAD. I "PANIC BRAKED" WHEN HE DID AND MY PEDAL WENT ALL THE WAY TO THE FLOOR WITH NO WARNING AND I SLOWED DOWN BUT DIDN'T STOP. WHEN I FOUND A SAFE PLACE …
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ON THE EVENING OF MAY 31ST I WAS DRIVING OUT A 2 LANE ROAD AT APPROX 40 MPH FOLLOWING ANOTHER VEHICLE. THE OTHER VEHICLE DID A "PANIC BRAKE" AND SWERVED TO MISS A DEER IN THE ROAD. I "PANIC BRAKED" WHEN HE DID AND MY PEDAL WENT ALL THE WAY TO THE FLOOR WITH NO WARNING AND I SLOWED DOWN BUT DIDN'T STOP. WHEN I FOUND A SAFE PLACE TO STOP I GOT OUT AND CHECKED MY FLUID WHICH WAS DOWN BUT NOT EMPTY AT THIS POINT. I HAD A WET SPOT BEHIND THE LEFT REAR TIRE ON THE FRAME RAIL. WHEN THE GARAGE LOOKED AT IT THE BRAKE LINE WAS VERY RUSTED AND CORRODED AND HAD RUPTURED. I HAD NO WARNING LIGHT ON EITHER INDICATING A BRAKE PROBLEM. IN RESEARCHING THIS ISSUE ON THE INTERNET IT SEEMS TO BE A COMMON PROBLEM IN THESE TRUCKS. I HAD A NEW LINE RUN AT THE COST OF $120.00. THIS IS A VERY BAD SITUATION, THERE WAS NO WARNING OF A PROBLEM BEFORE OR AFTER THE RUPTURE, I COULD SLOW DOWN BUT NOT STOP, I HAD TO SHIFT TO LOW GEAR TO TRY TO STOP, THE BRAKE WARNING LIGHT OR ALARM NEVER SOUNDED. PLEASE DO SOMETHING AND HAVE GM HELP FIX THIS BEFORE SOME INNOCENT PERSON(S) ARE HURT OR KILLED.
NHTSA ODI #10405098
Mileage unknown · May 22, 2011
Service Brakes, Hydraulic
I HAVE A 1999 EXT. CAB CHEVY SILVERADO, MY ABS ,BRAKE, AND LOW FUEL WARNING LIGHTS STAY LITE UP UNTIL I TURN OFF VEHICLE. AND I HAVE FUEL AND REPLACED BRAKES AND THE THESE WARNING LIGHTS STILL COME ON. *TR
NHTSA ODI #10402335
160,283 miles · Apr 19, 2011
Service Brakes, Hydraulic
I HAVE A 1999 CHEVY SILVERADO EXT CAB 4WD. WHEN I AM COMING TO A STOP AND ALMOST STOPPED THE ANTILOCK BRAKES START GOING OFF! ITS VERY SCARY BECAUSE IT INCREASES MY STOP TIME CONSIDERABLY ! IT IS ALMOST DEFINITELY GOING TO CAUSE ME TO BE IN AN ACCIDENT! MY MILEAGE IS ROUGHLY 160000. THE PROBLEM DOES NOT GET WORSE OR BETTER AND I…
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I HAVE A 1999 CHEVY SILVERADO EXT CAB 4WD. WHEN I AM COMING TO A STOP AND ALMOST STOPPED THE ANTILOCK BRAKES START GOING OFF! ITS VERY SCARY BECAUSE IT INCREASES MY STOP TIME CONSIDERABLY ! IT IS ALMOST DEFINITELY GOING TO CAUSE ME TO BE IN AN ACCIDENT! MY MILEAGE IS ROUGHLY 160000. THE PROBLEM DOES NOT GET WORSE OR BETTER AND IT HAPPENS AT ALMOST EVERY STOP!! THIS IS A YEAR THAT WASN'T INVOLVED IN THE RECALL AND DEFINITELY SHOULD OF BEEN! PLEASE HELP BEFORE IT CAUSES INJURY TO ME,MY FAMILY,OR SOMEBODY ELSE!! *TR
NHTSA ODI #10396806
102,000 miles · Apr 19, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THERE WAS A RECALL NHTSA CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) AND HIS VEHICLE WAS INCLUDED. THE RECALL REPAIRS WERE PERFORMED AT THE DEALER; HOWEVER, APPROXIMATELY FIVE YEARS AFTER THE REPAIRS WERE MADE THE CONTACT EXPERIENCED…
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TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THERE WAS A RECALL NHTSA CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK) AND HIS VEHICLE WAS INCLUDED. THE RECALL REPAIRS WERE PERFORMED AT THE DEALER; HOWEVER, APPROXIMATELY FIVE YEARS AFTER THE REPAIRS WERE MADE THE CONTACT EXPERIENCED A FAILURE WITH THE BRAKES. WHILE DRIVING APPROXIMATELY 10 MPH THE CONTACT STATED THAT WHEN HE DROVE OVER A BUMP IN THE ROAD THE BRAKE PEDAL FELL TO THE FLOOR AND THEN IT VIBRATED. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE TECHNICIANS STATED THAT THE REPAIRS WERE MADE UNDER THE RECALL AND THEY COULD NOT PROVIDE THE SERVICE FREE OF CHARGE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 102,000.
NHTSA ODI #10396757
103,567 miles · Apr 17, 2011
Service Brakes, Hydraulic
I OWN A 1999 CHEVY SILVERADO 1500 REG. CAB 4X4 PICKUP. MY REAR STEEL MAIN BRAKE LINE BLEW OUT RIGHT BEFORE THE REAR END DO TO EXCESSIVE CORROSION. MY BRAKE PEDAL WENT TO THE FLOOR. I WAS LUCKY I WAS ONLY GOING ABOUT 15 MPH AND WAS ABLE TO STOP USING THE EMERGENCY BRAKE. ALL OF MY BRAKE LINES ARE SEVERELY RUSTED. THIS IS DEFINIT…
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I OWN A 1999 CHEVY SILVERADO 1500 REG. CAB 4X4 PICKUP. MY REAR STEEL MAIN BRAKE LINE BLEW OUT RIGHT BEFORE THE REAR END DO TO EXCESSIVE CORROSION. MY BRAKE PEDAL WENT TO THE FLOOR. I WAS LUCKY I WAS ONLY GOING ABOUT 15 MPH AND WAS ABLE TO STOP USING THE EMERGENCY BRAKE. ALL OF MY BRAKE LINES ARE SEVERELY RUSTED. THIS IS DEFINITELY CAUSED BY INFERIOR PARTS AND GM SHOULD RECALL THESE TRUCKS BEFORE SOMEONE GETS KILLED!!!! *TR
NHTSA ODI #10396593
95,470 miles · Apr 4, 2011
Service Brakes, Hydraulic
1. STARTED ENGINE PULLED FORWARD APPLIED BRAKES. MOMENTARY NORMAL BRAKING THEN THE PETAL WENT TO THE FLOOR WITH NO WARNING. NO FAILURE NOTICE OF THE BRAKING SYSTEM. GREATLY DIMINISHED BRAKING ABILITY. 2. BRAKE LINE RUPTURE IN THE VICINITY OF THE ELECTRONIC BRAKE CONTROL UNIT DUE TO CORROSION. NEAR TOTAL LOSE OF BRAKING.…
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1. STARTED ENGINE PULLED FORWARD APPLIED BRAKES. MOMENTARY NORMAL BRAKING THEN THE PETAL WENT TO THE FLOOR WITH NO WARNING. NO FAILURE NOTICE OF THE BRAKING SYSTEM. GREATLY DIMINISHED BRAKING ABILITY. 2. BRAKE LINE RUPTURE IN THE VICINITY OF THE ELECTRONIC BRAKE CONTROL UNIT DUE TO CORROSION. NEAR TOTAL LOSE OF BRAKING. GREATLY INCREASED STOPPING DISTANCE. 3. REPAIR IN PROCESS. *TR
NHTSA ODI #10394114
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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