NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
237 reportsClear category filter50,000 miles · Oct 26, 2014
Service BrakesService Brakes, Hydraulic
WHEN BRAKING AT LOW SPEEDS THE ABS WOULD COME ON AND THE VEHICLE WOULD NOT STOP ON SOLID DRY PAVEMENT. UPON MY INVESTIGATION WHAT I FOUND WAS THE FRONT HUB BEARING SEAL RUSTED OUT. THIS CAUSED ROAD SALTS/WATER TO ENTER THE HUB ASSY.. THIS THEN CREATED A RUST THAT GATHERED ON THE MAGNETIC ABS SPEED SENSOR . THE GM CAMPAIGN UNDE…
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WHEN BRAKING AT LOW SPEEDS THE ABS WOULD COME ON AND THE VEHICLE WOULD NOT STOP ON SOLID DRY PAVEMENT. UPON MY INVESTIGATION WHAT I FOUND WAS THE FRONT HUB BEARING SEAL RUSTED OUT. THIS CAUSED ROAD SALTS/WATER TO ENTER THE HUB ASSY.. THIS THEN CREATED A RUST THAT GATHERED ON THE MAGNETIC ABS SPEED SENSOR . THE GM CAMPAIGN UNDER NHTSA CAMPAIGN NUMBER: 05V379000 SAYS THIS IS DUE TO AN EXTERIOR RUST ISSUE. THIS IS NOT WHAT I FOUND ! WHEN THE GM PROCEDURE TO REPAIR THIS IS DONE , IT WILL FIX THE PROBLEM FOR A SHORT TIME BECAUSE THE RUSTED GREASE IS REMOVED FROM THE SENSOR TIP . I REPLACED BOTH FRONT HUB ASSY AND THIS IS NOW NOT A DEFECT . MY COMPLAINT IS THAT MANY HAVE REPORTED THAT , THIS IS A ONE TIME FIX, SO IT IS MY BELIEF GM SOLD THIS QUICK FIX TO NHTSA TO CHEAP OUT ON THE REAL FIX , WHICH IS TO REPLACE THE FRONT HUB ASSY AND USE SEALS WITH A RUST RESISTANT METAL . IT IS A LOT CHEAPER TO REMOVE THE RUST OFF THE SENSOR TIP , THAN TO FIX THE REAL CAUSE WHICH IS A RUSTED DAMAGED HUB ASSY DUE TO POOR METAL QUALITY OF THE GREASE/HUB BEARING SEAL. I HAVE BEEN WORKING ON TRANSPORTATION VEHICLES SINCE 1977 INCLUDING VEHICLES WITH ABS BRAKING SYSTEMS . *TR
NHTSA ODI #10650025
105,000 miles · Sep 25, 2014
Service BrakesService Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 SILVERADO 1500. THE CONTACT STATED WHILE DRIVING APPROXIMATELY 45 MPH, THE BRAKE PEDAL WENT TO THE FLOOR ABRUPTLY WHEN ENGAGED. THE BRAKES WERE APPLIED REPEATEDLY HOWEVER, THE VEHICLE FAILED TO SLOW DOWN. THE VEHICLE WAS MANEUVERED OFF THE ROAD IN A BACK AND FORTH MOTION ONTO A GRASSY SURFACE UNTIL RE…
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TL* THE CONTACT OWNS A 2000 SILVERADO 1500. THE CONTACT STATED WHILE DRIVING APPROXIMATELY 45 MPH, THE BRAKE PEDAL WENT TO THE FLOOR ABRUPTLY WHEN ENGAGED. THE BRAKES WERE APPLIED REPEATEDLY HOWEVER, THE VEHICLE FAILED TO SLOW DOWN. THE VEHICLE WAS MANEUVERED OFF THE ROAD IN A BACK AND FORTH MOTION ONTO A GRASSY SURFACE UNTIL REACHING A PARKING LOT. THE VEHICLE CAME TO A STOP AFTER DRIVING OVER A SPEED BUMP. THE CONTACT INSPECTED THE VEHICLE AND PLACED A RUBBER HOSE OVER THE HOLES IN THE FAULTY BRAKE LINES AND SECURED WITH SUPPORT CLAMPS. THE VEHICLE WAS DRIVEN TO THE RESIDENCE AT AN EXTREMELY LOW SPEED. THE CONTACT REPLACED BOTH FRONT BRAKE LINES AND MAIN LINES HIMSELF. THE MANUFACTURER WAS NOTIFIED OF THE ISSUE. THE VIN WAS NOT AVAILABLE. THE APPROXIMATE FAILURE MILEAGE WAS 105,000.
NHTSA ODI #10639064
142,890 miles · Dec 9, 2013
Service BrakesService Brakes, Hydraulic
VEHICLE CAME TO STOP IN FRONT OF ME. DEPRESSING THE BRAKES, THE BRAKE PEDAL WENT TO THE FLOOR AND HAD TO SWERVE OFF THE ROAD AND INTO THE DITCH OF THE HIGHWAY TO AVOID AN ACCIDENT WITH THE OTHER VEHICLE. LEARNED THAT THE BRAKE LINES HAD RUSTED OUT AND CAUSED A SIGNIFICANT LEAK. UPON RESEARCHING THIS, FOUND OUT THIS HAS BEEN A…
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VEHICLE CAME TO STOP IN FRONT OF ME. DEPRESSING THE BRAKES, THE BRAKE PEDAL WENT TO THE FLOOR AND HAD TO SWERVE OFF THE ROAD AND INTO THE DITCH OF THE HIGHWAY TO AVOID AN ACCIDENT WITH THE OTHER VEHICLE. LEARNED THAT THE BRAKE LINES HAD RUSTED OUT AND CAUSED A SIGNIFICANT LEAK. UPON RESEARCHING THIS, FOUND OUT THIS HAS BEEN A COMMON PROBLEM WITH MY VEHICLE, AND THAT THERE IS AN INVESTIGATION EA11001 THAT HAS BEEN ONGOING FOR CLOSE TO 2 YEARS. 800+ REPORTS EXIST. THOUSANDS MORE UNREPORTED IN VARIOUS INTERNET FORUMS. WHEN WILL THIS BE RESOLVED WITH A VEHICLE SAFETY RECALL, BEFORE SOMEONE GETS KILLED? THIS IS A BAD DESIGN, DUE TO STEEL BRAKE LINES, AND DESIGNED TO COLLECT MOISTURE AND SALT BY MEANS OF SPRING MATERIAL ON EXTERIOR OF LINES, AND LINES GROUPED TOGETHER DIRECTLY BEHIND THE SPLASH COMING OFF THE FRONT TIRE. IT IS AN OBVIOUS FLAW. FURTHERMORE, GM APPARENTLY DOES NOT HAVE GM REPLACEMENT (CERTIFIED?) SET OF BRAKE LINES. IS IT GOING TO TAKE A FATAL CRASH TO FINALLY RESOLVE THIS? *TR
NHTSA ODI #10555332
54,506 miles · Nov 21, 2012
Service Brakes, Hydraulic
WHEN COMING TO STOP SIGN, BRAKE PEDAL WENT TO FLOOR.
NHTSA ODI #10486902
80,001 miles · Sep 17, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING 30 MPH THE ABS AND EMERGENCY BRAKE WARNING LIGHTS ILLUMINATED ON THE DASHBOARD. THE FAILURE RECURRED NUMEROUS TIMES. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND THE CONTACT WAS INFORMED THAT THERE WAS A FAILURE WITH…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE DRIVING 30 MPH THE ABS AND EMERGENCY BRAKE WARNING LIGHTS ILLUMINATED ON THE DASHBOARD. THE FAILURE RECURRED NUMEROUS TIMES. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND THE CONTACT WAS INFORMED THAT THERE WAS A FAILURE WITH THE WHEEL SPEED SENSOR. THE CONTACT WAS ALSO INFORMED OF A RECALL UNDER NHTSA CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTI-LOCK). THE DEALER AND MANUFACTURER WERE NOTIFIED AND BOTH ADVISED THE CONTACT THAT THE VINE WAS NOT INCLUDED IN THE RECALL. THE FAILURE AND CURRENT MILEAGES WERE 80,001. ..UPDATED 11/28/12 *BF UPDATED 11/29/12.*JB
NHTSA ODI #10475615
62,345 miles · Jun 26, 2012
Service BrakesService Brakes, Hydraulic
THE BRAKE LINES OF THE CHEVY SILVERADO 1500 HAVE ALL RUSTED OUT. THE UNDERCARRIAGE AND BRAKE LINES HAVE CORRODED CAUSING BRAKE FAILURE. SOME OF THE LINES WERE REPLACED WITHIN A FEW YEARS. BRAKE CALIPERS AFFECTED AS WELL. *JB *JB
NHTSA ODI #10463198
105,800 miles · Jun 15, 2012
Service Brakes, Hydraulic
DEPRESSED BRAKE PEDAL TO SHIFT OUT OF PARK,PEDAL WENT TO FLOOR. NO BRAKES.AAA TOWED TO DEALER. BRAKE LINES RUSTED OUT. LUCKY THIS WAS NOT AN EMERGENCY STOP!! GM NO HELP. $1451.00 LATER TRUCK REPAIRED. DRIVING GM PRODUCTS SINCE 1972 HAVE NEVER HAD THE CORRISON PROBLEMS THAT I HAVE HAD WITH THIS TRUCK.ROTORS BRAKES BRAKE LINES. …
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DEPRESSED BRAKE PEDAL TO SHIFT OUT OF PARK,PEDAL WENT TO FLOOR. NO BRAKES.AAA TOWED TO DEALER. BRAKE LINES RUSTED OUT. LUCKY THIS WAS NOT AN EMERGENCY STOP!! GM NO HELP. $1451.00 LATER TRUCK REPAIRED. DRIVING GM PRODUCTS SINCE 1972 HAVE NEVER HAD THE CORRISON PROBLEMS THAT I HAVE HAD WITH THIS TRUCK.ROTORS BRAKES BRAKE LINES. *JB
NHTSA ODI #10461883
150,000 miles · Apr 23, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 60 MPH WHEN THE BRAKE PEDAL BECAME STUCK TO THE FLOORBOARD. THE CONTACT PUMPED THE BRAKES SEVERAL TIMES BEFORE IT INDEPENDENTLY RELEASED. THE VEHICLE WAS NOT TAKEN TO THE DEALER NOR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VIN …
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING 60 MPH WHEN THE BRAKE PEDAL BECAME STUCK TO THE FLOORBOARD. THE CONTACT PUMPED THE BRAKES SEVERAL TIMES BEFORE IT INDEPENDENTLY RELEASED. THE VEHICLE WAS NOT TAKEN TO THE DEALER NOR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VIN WAS NOT AVAILABLE. THE FAILURE AND THE CURRENT MILEAGE WAS 150,000.
NHTSA ODI #10456116
60,000 miles · Apr 22, 2012
Service Brakes, Hydraulic
07/06/2008 - LEAVING A PARKING LOT. ATTEMPTED TO STOP. BRAKE PEDAL WENT TO FLOOR. BRAKE LINES CRACKED DUE TO RUST. BRAKE FLUID WAS COVERING GROUND UNDER TRUCK. THREE OUT OF FOUR MAIN LINES WERE REPLACED. 04/22/2012 - MILEAGE-98,600 - LEAVING MY DRIVEWAY AND DEPRESSED BRAKE PEDAL. BRAKE PEDAL WENT TO FLOOR. RIGHT FRONT…
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07/06/2008 - LEAVING A PARKING LOT. ATTEMPTED TO STOP. BRAKE PEDAL WENT TO FLOOR. BRAKE LINES CRACKED DUE TO RUST. BRAKE FLUID WAS COVERING GROUND UNDER TRUCK. THREE OUT OF FOUR MAIN LINES WERE REPLACED. 04/22/2012 - MILEAGE-98,600 - LEAVING MY DRIVEWAY AND DEPRESSED BRAKE PEDAL. BRAKE PEDAL WENT TO FLOOR. RIGHT FRONT BRAKE LINE HAD HOLES DUE TO RUST. THIS LINE WAS A SEPARATE LINE FROM THE OTHER THREE OUT OF FOUR LINES THAT WERE REPLACED. *TR
NHTSA ODI #10456065
53,387 miles · Apr 15, 2012
Service Brakes, Hydraulic
APPLYING BRAKES FOR SLOW TRAFFIC THE PEDAL WENT TO THE FLOOR. RAN OFF THE ROAD TO AVOID HITTING VEHICLE IN FRONT. NOTED FAILURE OF REAR BRAKE STEEL LINE WHICH WAS HEAVILY RUSTED. NO WARNINGS PRIOR TO BRAKE FAILURE. *TR
NHTSA ODI #10455293
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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