NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
158 reports55,350 miles · Jun 17, 2010
Seats
1999 GMC SIERRA ABOUT 55,000MILES: MANUAL SEAT DRIVERS SIDE: THE DEVICE THAT PREVENTS THE SEAT FROM SLIDING BACK AND FORTH FREELY ON ITS TRACKS HAS FAILED. NOW THE SEAT IS ALL THE WAY BACK EXCEPT UNDER BRAKING, WHEN IT ABRUPTLY SLIDES ALL THE WAY TO THE STEERING WHEEL. NO MATTER HOW ALERT YOU TRY TO BE, EVENTUALLY SOME MANEUVER …
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1999 GMC SIERRA ABOUT 55,000MILES: MANUAL SEAT DRIVERS SIDE: THE DEVICE THAT PREVENTS THE SEAT FROM SLIDING BACK AND FORTH FREELY ON ITS TRACKS HAS FAILED. NOW THE SEAT IS ALL THE WAY BACK EXCEPT UNDER BRAKING, WHEN IT ABRUPTLY SLIDES ALL THE WAY TO THE STEERING WHEEL. NO MATTER HOW ALERT YOU TRY TO BE, EVENTUALLY SOME MANEUVER WILL BE NEEDED WITHOUT TIME TO BRACE YOURSELF, YOUR FOOT WILL MASH THE BRAKE UNCONTROLLABLY TO THE FLOOR AS THE SEAT RUSHES FORWARD, YOUR ARMS WON'T BE ABLE TO STEER AS YOUR BODY RUSHES FORWARD INTO THE STEERING WHEEL. A HANDFUL OF BROKEN NYLON PIECES AND ZINC CASTING PIECES AND A SPRING WERE RECOVERED FROM THE STARBOARD TRACK. DEALER DOESN'T HAVE A REPLACEMENT FOR JUST THE BROKEN STUFF, THE TRACK ASSEMBLY IS INSANELY EXPENSIVE ($500 FOR BOTH SIDES) NOT COUNTING LABOR. NO JUNKYARD I CAN FIND HAS THE PART, THIS MODEL SEAT WAS ONLY MADE IN 1999. I FOUND ABOUT A DOZEN COMPLAINTS ONLINE ABOUT THIS WHEN I DID A GOOGLE SEARCH. *TR
NHTSA ODI #10336781
150,000 miles · Jun 11, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE BRAKING FROM UNKNOWN SPEEDS, THE BRAKES WOULD NOT ENGAGE. THE CONTACT HAD TO UTILIZE THE EMERGENCY BRAKE AND PROCEEDED UP AN INCLINE TO STOP THE VEHICLE. THE VEHICLE WAS TOWED TO THE CONTACTS RESIDENCE. THE CONTACT STATED THE BRAKE LINE EXPLODED DUE TO CO…
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TL* THE CONTACT OWNS A 1999 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE BRAKING FROM UNKNOWN SPEEDS, THE BRAKES WOULD NOT ENGAGE. THE CONTACT HAD TO UTILIZE THE EMERGENCY BRAKE AND PROCEEDED UP AN INCLINE TO STOP THE VEHICLE. THE VEHICLE WAS TOWED TO THE CONTACTS RESIDENCE. THE CONTACT STATED THE BRAKE LINE EXPLODED DUE TO CORROSION. THE DEALER ADVISED THE CONTACT TO BRING THE VEHICLE IN FOR REPAIRS. THE MANUFACTURER WOULD NOT ASSIST. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 150,000.
NHTSA ODI #10335823
Mileage unknown · May 7, 2010
Service Brakes, Hydraulic
1999 GMC K1500 TRUCK. CONSUMER STATES PROBLEMS WITH THE BRAKES *TGW THE CONSUMER STATED HE HAS SPENT OVER $2,157.81 IN BRAKE REPAIRS. THE BRAKE LINES, RIGHT REAR CALIPER AND REAR DISC BRAKE ROTOR HAD TO BE REPLACED. *JB
NHTSA ODI #10329610
99,101 miles · Apr 22, 2010
Service Brakes, Hydraulic
BRAKE LINE BLEW OUT CORRODED. HAD TO REPLACE 5 BRAKE LINES AND 2 FRONT CALIPER DO TO CORROSION. MY BILL AT GM DEALER $957.35 FOR REPAIRS. *TR
NHTSA ODI #10327034
90,000 miles · Apr 17, 2010
Service Brakes, Hydraulic
1999.5 GMC SIERRA 1500 4WD EXT CAB, SHORTBED. MAY 2005 FRONT BRAKE LINE BURST WHILE APPLYING BRAKES DUE TO SLOWED TRAFFIC ON 65MPH INTERSTATE IN UPSTATE NY. USED SHOULDER TO AVOID HITTING VEHICLES IN FRONT OF ME, HOWEVER REAR BRAKES ONLY ON A 6K POUND PICKUP TRUCK, UNLOADED, DO NOT RESULT IN EFFECTIVE BRAKING. I HAD TO DOW…
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1999.5 GMC SIERRA 1500 4WD EXT CAB, SHORTBED. MAY 2005 FRONT BRAKE LINE BURST WHILE APPLYING BRAKES DUE TO SLOWED TRAFFIC ON 65MPH INTERSTATE IN UPSTATE NY. USED SHOULDER TO AVOID HITTING VEHICLES IN FRONT OF ME, HOWEVER REAR BRAKES ONLY ON A 6K POUND PICKUP TRUCK, UNLOADED, DO NOT RESULT IN EFFECTIVE BRAKING. I HAD TO DOWNSHIFT MY AUTOMATIC TO USE ENGINE BRAKING AS WELL AS THE PARKING BRAKE (WHICH ALSO IS POORLY DESIGNED AND INEFFECTIVE). TRUCK WAS TOWED TO GM DEALER WHERE FRONT BRAKE LINES WERE REPLACED AS ALL WERE RUSTED/ROTTED TO UNSAFE LEVELS, WITH ONE FRACTURING CAUSING THE LOSS OF PRESSURE AND FLUID. APRIL 2009 UPON DOING AN OIL CHANGED, MYSELF, I DISCOVER THE ALL OF THE BRAKE LINES, INCLUDING THE FRONT AS WELL AS THE REAR ARE IN VERY BAD SHAPE DUE TO RUST. AFTER SPEAKING TO MY MECHANIC I HAVE LEARNED THAT THE GM BRAKE LIKE FROM THE LATE 90S TO 2004 WERE NOT PROPERLY DESIGNED TO DEAL WITH THE WEATHER AND RESIST CORROSION. HE SAID AT LEAST ONCE A WEEK HE HAS TO REPLACE SECTIONS OF GM BRAKE LINE FROM THESE TRUCKS AND SUVS. I CANNOT CURRENTLY AFFORD TO REPLACE THESE YET AS ITS A $1700 JOB DUE TO THE LABOR INVOLVED AND THE FACT THAT REPLACING WITH GM'S BRAKE LINES WILL JUST RUST AGAIN IN 2-3 YEARS. SO I NEED AFTERMARKET LINES, PROBABLY STAINLESS STEEL OR AT LEAST SOMETHING WITH A PROPER AMOUNT OF NICKEL IN IT (WHICH GM HAS SKIMPED ON!) WHICH HOPEFULLY I CAN PUT ON IN THE NEXT FEW MONTHS BEFORE I GET KILLED OR SOMEONE ELSE KILLED. APRIL 2010. *TR
NHTSA ODI #10326108
66,000 miles · Apr 16, 2010
Service Brakes, HydraulicCrash
BRAKE LINE FAILURE DUE TO EXTREME RUST. AFTER ACCIDENT I CHECKED SEVERAL OTHER TRUCKS OF THE SAME VINTAGE WHERE I WORKED AND ALL HAD SIMILAR PROBLEM. *TR
NHTSA ODI #10325973
59,617 miles · Apr 16, 2010
Suspension
TL*THE CONTACT 1999 GMC SIERRA 1500. WHILE DRIVING 10 MPH THE BRAKES WERE APPLIED BUT THE VEHICLE DID NOT STOP UNTIL REPEATED PRESSURE AND THE EMERGENCY BRAKE WAS APPLIED. THE VEHICLE WAS TAKEN TO AN AUTHORIZED GMC DEALER AND THE LEFT FRONT HUB ASSEMBLY WAS REPLACED. THE FAILURE DID NOT RECUR. THE FAILURE MILEAGE WAS 59,617 A…
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TL*THE CONTACT 1999 GMC SIERRA 1500. WHILE DRIVING 10 MPH THE BRAKES WERE APPLIED BUT THE VEHICLE DID NOT STOP UNTIL REPEATED PRESSURE AND THE EMERGENCY BRAKE WAS APPLIED. THE VEHICLE WAS TAKEN TO AN AUTHORIZED GMC DEALER AND THE LEFT FRONT HUB ASSEMBLY WAS REPLACED. THE FAILURE DID NOT RECUR. THE FAILURE MILEAGE WAS 59,617 AND THE CURRENT MILEAGE WAS 127,000.
NHTSA ODI #10325956
278,203 miles · Apr 14, 2010
Service Brakes, Hydraulic
BRAKE LINE LET GO WHEN BRAKES WERE APPLIED AND FLUID STARTED TO LEAK FROM UNDER THE DRIVERS SIDE UNDER DOOR/ TRUCK IS NOT OPERABLE SINCE / CURRENTLY WAITING TO BE ABLE TO AFFORD TO HAVE FIXED AS WAS ADVISED THAT COULD COST UP TO 500 HUNDRED DOLLARS AS ALL LINES WOULD NEED TO BE REPAIRED AS THEY ALL ARE CORRODED TO POINT OF MORE…
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BRAKE LINE LET GO WHEN BRAKES WERE APPLIED AND FLUID STARTED TO LEAK FROM UNDER THE DRIVERS SIDE UNDER DOOR/ TRUCK IS NOT OPERABLE SINCE / CURRENTLY WAITING TO BE ABLE TO AFFORD TO HAVE FIXED AS WAS ADVISED THAT COULD COST UP TO 500 HUNDRED DOLLARS AS ALL LINES WOULD NEED TO BE REPAIRED AS THEY ALL ARE CORRODED TO POINT OF MORE BREAKAGE. *TR
NHTSA ODI #10325727
160,000 miles · Apr 13, 2010
Service Brakes, Hydraulic
1999 GMC SIERRA 1500 5.3 - I HAD BRAKE LINES FAIL ON 3 SEPARATE OCCASIONS. FIRST WAS A HARD LINE TO THE FRONT DRIVERS SIDE, HAPPENED IN MY DRIVEWAY SO NO CRASH. SECOND WAS A LINE COMING FROM THE MASTER CYLINDER. THIS WAS WHILE TOWING A TRAILER AND THE TRAILER BRAKES MANAGED TO GET US STOPPED EVEN THOUGH WE WERE ON A HILL. THE TH…
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1999 GMC SIERRA 1500 5.3 - I HAD BRAKE LINES FAIL ON 3 SEPARATE OCCASIONS. FIRST WAS A HARD LINE TO THE FRONT DRIVERS SIDE, HAPPENED IN MY DRIVEWAY SO NO CRASH. SECOND WAS A LINE COMING FROM THE MASTER CYLINDER. THIS WAS WHILE TOWING A TRAILER AND THE TRAILER BRAKES MANAGED TO GET US STOPPED EVEN THOUGH WE WERE ON A HILL. THE THIRD FAILURE WAS STOPPING AT A LIGHT, LUCKILY NO ONE WAS IN FRONT OF ME AND I HAD PLENTY OF STOPPING DISTANCE. AFTER THAT I REPLACED ALL OF THE REMAINING LINES ON THE TRUCK. NO PROBLEMS SINCE. *TR
NHTSA ODI #10325463
68,000 miles · Apr 10, 2010
Service Brakes, HydraulicCrash
1999 GMC SIERRA PICKUP REGULAR CAB 4 WHEEL DISC BRAKES. TRUCK WOULD NOT COME TO A COMPLETE STOP AT A TRAFFIC LIGHT, SPEED LESS THAN 5 MPH. PEDAL VIBRATED THEN WENT ALMOST TO THE FLOOR. TRUCK BUMPED INTO CAR IN FRONT OF IT CAUSING MINOR DAMAGE TO CAR, VERY SLIGHT DAMAGE TO TRUCK. ROADS WERE CLEAR AND DRY, DAY WAS COLD BUT SUNNY. …
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1999 GMC SIERRA PICKUP REGULAR CAB 4 WHEEL DISC BRAKES. TRUCK WOULD NOT COME TO A COMPLETE STOP AT A TRAFFIC LIGHT, SPEED LESS THAN 5 MPH. PEDAL VIBRATED THEN WENT ALMOST TO THE FLOOR. TRUCK BUMPED INTO CAR IN FRONT OF IT CAUSING MINOR DAMAGE TO CAR, VERY SLIGHT DAMAGE TO TRUCK. ROADS WERE CLEAR AND DRY, DAY WAS COLD BUT SUNNY. *TR
NHTSA ODI #10324859
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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