NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
587 reports95,470 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.…
Read full complaint
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
88,000 miles · Mar 29, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH, THE ABS AND PARKING BRAKE WARNING INDICATORS ILLUMINATED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR DIAGNOSIS AND THEY STATED THAT THE ELECTRONIC BRAKE MODULE FAILED. THE VEHICLE HAD NOT BEEN REPAIRED.…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH, THE ABS AND PARKING BRAKE WARNING INDICATORS ILLUMINATED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER FOR DIAGNOSIS AND THEY STATED THAT THE ELECTRONIC BRAKE MODULE FAILED. THE VEHICLE HAD NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 88,000. UPDATED 05/03/11*LJ THE CONSUMER STATED THE ABS CONTROL MODULE NEEDED TO BE REPLACED. ALSO, THE BRAKES LINES WERE RUSTED. UPDATED 05/19/11
NHTSA ODI #10393625
125,000 miles · Mar 17, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT AFTER STARTING HIS VEHICLE AND DEPRESSING THE BRAKES, THE PEDAL EXTENDED TO THE FLOORBOARD. HE NOTICED THAT ALL OF THE BRAKE FLUID LEAKED OUT OF THE VEHICLE DUE TO THE BRAKE LINE BEING CORRODED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC AND WHO R…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT AFTER STARTING HIS VEHICLE AND DEPRESSING THE BRAKES, THE PEDAL EXTENDED TO THE FLOORBOARD. HE NOTICED THAT ALL OF THE BRAKE FLUID LEAKED OUT OF THE VEHICLE DUE TO THE BRAKE LINE BEING CORRODED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC AND WHO REPLACED THE ENTIRE BRAKE LINE. THE FAILURE MILEAGE WAS APPROXIMATELY 125,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10390537
96,823 miles · Mar 13, 2011
Service Brakes, Hydraulic
THE ORIGINAL EQUIPMENT MANUFACTURER BRAKE LINES RUSTED THROUGH AND CREATED A CONDITION OF SUBSTANTIAL FLUID LOSS AND HENCE NEARLY COMPLETE BRAKE FAILURE ON 1MAR2011. THERE WAS NO WARNING OF THE IMPENDING FAILURE. AS THE PRINCIPLE DRIVER WAS LEAVING THE DRIVEWAY THE TRUCK NEARLY DIDN'T STOP IN TIME FOR AN APPROACHING HIGHWAY-SP…
Read full complaint
THE ORIGINAL EQUIPMENT MANUFACTURER BRAKE LINES RUSTED THROUGH AND CREATED A CONDITION OF SUBSTANTIAL FLUID LOSS AND HENCE NEARLY COMPLETE BRAKE FAILURE ON 1MAR2011. THERE WAS NO WARNING OF THE IMPENDING FAILURE. AS THE PRINCIPLE DRIVER WAS LEAVING THE DRIVEWAY THE TRUCK NEARLY DIDN'T STOP IN TIME FOR AN APPROACHING HIGHWAY-SPEED VEHICLE. UPON PARKING THE VEHICLE AFTER THE FAILURE, BRAKE FLUID WAS DISCOVERED RUNNING OUT THE HARD STEEL BRAKE LINES ON THE DRIVERS SIDE OF THE TRUCK. THE LOCATION OF THE LINE FAILURE WAS VERY CLOSE TO WHERE LINES RUN ALONG UPPER OUTSIDE OF FRAME NEARING THE ABS UNIT. THE TRUCK OWNER, RESEARCHED THE CAUSES, FAILURES AND REMEDIES. THE TRUCK OWNER PURCHASED ALL NEW STEEL BRAKE LINES FOR ALL LINES, IN ADDITION ALL FLEXIBLE BRAKE LINES AND FITTINGS IN ORDER TO REPAIR THE FAILURE. *TR
NHTSA ODI #10389958
115,000 miles · Jan 28, 2011
Structure
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO K1500. THE CONTACT STATED THAT THE SUBFRAME OF THE VEHICLE WAS SEVERELY RUSTED. THE DEALER WAS NOTIFIED OF THE FAILURE WHO INFORMED THE CONTACT THAT THE SUB FRAME COULD NOT BE REPAIRED BUT WOULD NEED REPLACING. THE MANUFACTURER WAS CONTACTED WHO OFFERED TO PROVIDE HIM WITH A $2000 …
Read full complaint
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO K1500. THE CONTACT STATED THAT THE SUBFRAME OF THE VEHICLE WAS SEVERELY RUSTED. THE DEALER WAS NOTIFIED OF THE FAILURE WHO INFORMED THE CONTACT THAT THE SUB FRAME COULD NOT BE REPAIRED BUT WOULD NEED REPLACING. THE MANUFACTURER WAS CONTACTED WHO OFFERED TO PROVIDE HIM WITH A $2000 DISCOUNT TOWARD THE PURCHASE OF A NEW VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE CURRENT AND FAILURE MILEAGE WAS 115,000.
NHTSA ODI #10379404
109,200 miles · Jan 22, 2011
Latches/locks/linkagesSeats
1999 CHEVY SILVERADO. ON 1/21/11 I PULLED THE MANUAL RELEASE LEVER TO RELEASE THE DRIVER'S SIDE SEAT AND LOAD MATERIAL INTO THE EXTENDED CAB OF MY PICKUP. A PLASTIC PIECE WITH METAL COMPONENTS INSIDE THE TRACK (QUOTED FROM DEALER AS A SEAT ADJUSTER) FELL OUT OF THE RIGHT SIDE TRACK. MY DRIVER'S SIDE SEAT WOULD NOT AND CONTINUES…
Read full complaint
1999 CHEVY SILVERADO. ON 1/21/11 I PULLED THE MANUAL RELEASE LEVER TO RELEASE THE DRIVER'S SIDE SEAT AND LOAD MATERIAL INTO THE EXTENDED CAB OF MY PICKUP. A PLASTIC PIECE WITH METAL COMPONENTS INSIDE THE TRACK (QUOTED FROM DEALER AS A SEAT ADJUSTER) FELL OUT OF THE RIGHT SIDE TRACK. MY DRIVER'S SIDE SEAT WOULD NOT AND CONTINUES NOT TO LOCK INTO PLACE, CAUSING ME TO HAVE TO DRIVE WITH ONE FOOT ON THE FLOORBOARD, AND USE THE OTHER TO ACCELERATE AND BRAKE CONTINUOUSLY. WHEN DRIVEN, THE SEAT FREELY MOVES FORWARD AND BACKWARD WITH CENTRIFUGAL FORCE. NOTE: THE SEATBELT IS ATTACHED TO THE SEAT COMPLETELY, NOT ANCHORED TO THE SIDEWALL AND FLOOR OF THE VEHICLE, SO THERE IS NOTHING TO KEEP A DRIVER FROM SLIDING ALL THE WAY TO THE STEERING WHEEL IF AND WHEN THIS PIECE FAILS. *TR
NHTSA ODI #10378235
Mileage unknown · Jan 21, 2011
Seat Belts
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT BOTH FRONT SEAT BELT RETRACTORS NO LONGER FUNCTIONED PROPERLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CONTACT WAS TOLD THE SEAT BELT RETRACTORS FAILED DUE TO THE AGE OF THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT…
Read full complaint
TL*THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT BOTH FRONT SEAT BELT RETRACTORS NO LONGER FUNCTIONED PROPERLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CONTACT WAS TOLD THE SEAT BELT RETRACTORS FAILED DUE TO THE AGE OF THE VEHICLE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE UNAVAILABLE. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10378110
115,000 miles · Jan 19, 2011
Electrical System
DASH LIGHTS (4W/DRIVE,CRUISE,BRIGHTLIGHTS)STAY ON,GAUGES DO NOT WORK RIGHT. WAS TOLD WIRING HARNESS HAS SHORT IN IT,NEEDS REPLACED. *TR
NHTSA ODI #10377930
70,000 miles · Jan 14, 2011
Electrical System
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT INSTRUMENT PANEL GAUGES WOULD FAIL SPORADICALLY. THE GAUGES WOULD FLUCTUATE TO THE LEFT SIMULTANEOUSLY INDICATING THAT THE FUEL TANK WAS LOW, THE ENGINE WAS RUNNING HOT AND SO FORTH. THE VEHICLE HAD BEEN TAKEN TO THE DEALER SEVERAL TIMES BUT NEVER AT T…
Read full complaint
TL* THE CONTACT OWNS A 1999 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT INSTRUMENT PANEL GAUGES WOULD FAIL SPORADICALLY. THE GAUGES WOULD FLUCTUATE TO THE LEFT SIMULTANEOUSLY INDICATING THAT THE FUEL TANK WAS LOW, THE ENGINE WAS RUNNING HOT AND SO FORTH. THE VEHICLE HAD BEEN TAKEN TO THE DEALER SEVERAL TIMES BUT NEVER AT THE TIME WHEN THE FAILURE WAS ACTUALLY OCCURRING SO THE DEALER WAS UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE CONTACT EXPRESSED THAT HE DID NOT FEEL SAFE DRIVING THE VEHICLE. THE FAILURE MILEAGE WAS 70,000 AND THE CURRENT MILEAGE WAS 100,000. UPDATED 5/9/11 *CN UPDATED 05/16/11
NHTSA ODI #10376634
145,000 miles · Dec 25, 2010
Service Brakes, Hydraulic
WHILE DRIVING MY 1999 CHEVY SILVERADO I WENT TO STOP AND THE BRAKE WENT TO THE FLOOR. I GOT OUT AND FOUND THE BRAKE LINE IN THE ENGINE COMPARTMENT HAD BURST. ALL OF THE LINES WERE RUSTED TO THE POINT OF FAILURE. *TR
NHTSA ODI #10372381
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.
Illustration