NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
509 reports95,224 miles · Jun 21, 2012
Equipment Adaptive/mobilityService BrakesUnknown Or Other
I WAS DRIVING 60MPH WHEN CONSTRUCTION CONES BROUGHT TRAFFIC TO ONE LANE. AS I BEGAN TO APPLY MY BRAKES, I COULD FEEL MY FOOT GOING TO THE FLOOR AND I WAS NOT SLOWING AT ALL. I TRIED THE EMERGNCY BRAKE, AND ALSO NO BRAKING OCCURED. I MANAGED TO DRIVE ONTO THE MEDIUM, AND LUCKILY WAS ABLE TO AVOID ALL THE "CONSTRUCTION JUNK" TH…
Read full complaint
I WAS DRIVING 60MPH WHEN CONSTRUCTION CONES BROUGHT TRAFFIC TO ONE LANE. AS I BEGAN TO APPLY MY BRAKES, I COULD FEEL MY FOOT GOING TO THE FLOOR AND I WAS NOT SLOWING AT ALL. I TRIED THE EMERGNCY BRAKE, AND ALSO NO BRAKING OCCURED. I MANAGED TO DRIVE ONTO THE MEDIUM, AND LUCKILY WAS ABLE TO AVOID ALL THE "CONSTRUCTION JUNK" THAT LITTERED THAT AREA. AFTER A VERY LONG TIME, I WAS ABLE TO SAFELY MANEUVER TO A SAFE STOP. WHEN I SPOKE WITH THE MECHANIC, HE TOLD ME THERE WERE NO BRAKE LINES. *TT
NHTSA ODI #10462552
54,000 miles · Jun 15, 2012
Service BrakesService Brakes, Hydraulic
WHILE DRIVING, THE VEHICLE OPERATOR EXPERIENCED COMPLETE BRAKE FAILURE--VEHICLE WAS TOWED TO NEAREST CHEVROLET DEALER AND IS NOW AWAITING "NEW " BRAKE LINE INSTALLATION. I HAVE BEEN TOLD THAT THE ENTIRE BRAKING SYSTEM HAS CORRODED AND WILL NEED TO BE REPLACED. *JB
NHTSA ODI #10461852
42,365 miles · May 26, 2012
Service Brakes
I AM THE ORIGINAL OWNER OF THIS 2002 CHEVY SILVERADO. I WAS DRIVING ABOUT 15 MPH AND AS I STARTED BRAKING THE PEDAL WENT TO THE FLOOR. ONCE THE PEDAL WENT TO THE FLOOR THE TRUCK STARTED TO BRAKE. I WAS ABLE TO SLOWLY MAKE IT HOME AS I WAS ONLY A HALF MILE AWAY. WHEN I GOT HOME I INSPECTED THE UNDER SIDE OF THE VEHICLE AND FOUND …
Read full complaint
I AM THE ORIGINAL OWNER OF THIS 2002 CHEVY SILVERADO. I WAS DRIVING ABOUT 15 MPH AND AS I STARTED BRAKING THE PEDAL WENT TO THE FLOOR. ONCE THE PEDAL WENT TO THE FLOOR THE TRUCK STARTED TO BRAKE. I WAS ABLE TO SLOWLY MAKE IT HOME AS I WAS ONLY A HALF MILE AWAY. WHEN I GOT HOME I INSPECTED THE UNDER SIDE OF THE VEHICLE AND FOUND THE MAIN REAR BRAKE LINE HAD RUSTED AND WAS SPILLING BRAKE FLUID NEAR THE DRIVER REAR SHOCK. AFTER INSPECTING ALL THE STEEL TUBE BRAKE LINES THEY ALL WILL NEED REPLACING AS ALL ARE RUSTED VERY BADLY. *TR
NHTSA ODI #10459752
111,230 miles · Mar 5, 2012
Steering
STEERING SHAFT MAKES NOISES ON TURNS AND BUMPY ROADS. *TR
NHTSA ODI #10450283
126,997 miles · Feb 28, 2012
Service Brakes, Hydraulic
DURING BRAKING FROM 35MPH TO MAKE A RIGHT TURN MY BRAKE PEDAL WENT TO THE FLOOR. THE TRUCK DID NOT SLOW DOWN ENOUGH TO MAKE THE TURN, I DROVE DOWN A BLOCK TO THE NEXT INTERSECTION AND USED MY PARKING BRAKE TO COMPLETE MY STOP. I PARKED THE TRUCK AND IMMEDIATELY NOTICED FLUID FROM THE BRAKE LINE LEAKING OUT ON GROUND IN THE AREA …
Read full complaint
DURING BRAKING FROM 35MPH TO MAKE A RIGHT TURN MY BRAKE PEDAL WENT TO THE FLOOR. THE TRUCK DID NOT SLOW DOWN ENOUGH TO MAKE THE TURN, I DROVE DOWN A BLOCK TO THE NEXT INTERSECTION AND USED MY PARKING BRAKE TO COMPLETE MY STOP. I PARKED THE TRUCK AND IMMEDIATELY NOTICED FLUID FROM THE BRAKE LINE LEAKING OUT ON GROUND IN THE AREA JUST BELOW WHERE THE DRIVERS FEET ARE. THE LINE IS A RIGID STEEL LINE IN A GROUP WITH 3 OTHERS THAT RUN FROM THE ABS CONTROL UNIT FORWARD AND ALL OF THESE STEEL LINES ARE SEVERELY CORRODED PARTICULARLY IN THE AREA OUTSIDE OF THE FRAME WHERE THE LINE HAS RUPTURED. MY TRUCK IS A CHEVROLET 1500 Z71 WITH 126,000 MILES AND HAS BEEN WELL MAINTAINED SINCE I HAVE OWNED IT. I FEEL THAT THIS ISSUE IS EXTREMELY DANGEROUS AND HAVE FOUND THAT THERE ARE MANY OTHERS WITH RUSTED AND RUPTURED BRAKES ON THEIR CHEVY TRUCKS. OTHER PEOPLE WERE NOT AS FORTUNATE AS ME BECAUSE MY SON AND I MADE IT HOME AND WE WERE UNHARMED. I FEEL THAT IT IS IMPERATIVE EVERYONE WHO OWNS A CHEVY TRUCK OF SIMILAR MODEL YEAR BE ALERTED AND WARNED OF THIS POTENTIALLY DEADLY AND DANGEROUS BRAKE PROBLEM. *TR
NHTSA ODI #10449514
98,000 miles · Feb 26, 2012
Steering
WHEN I TURN OR HIT A BUMP IT MAKES A CLUNK, AND YOU CAN HEAR IT AND FEEL IT THROUGH THE STEERING WHEEL, NOW HAVE 119000 MILES ON IT. I AM CONSURNED IT MY BECOME A SAFETY ISSUE. *TR
NHTSA ODI #10449362
105,000 miles · Feb 17, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE THE BRAKES WERE DEPRESSED, THE BRAKE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE MECHANIC CONFIRMED HAT THE BRAKE LINE HAD RUPTURED. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS REPAIRED. THE FAILURE M…
Read full complaint
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT WHILE THE BRAKES WERE DEPRESSED, THE BRAKE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO A PRIVATE MECHANIC WHERE THE MECHANIC CONFIRMED HAT THE BRAKE LINE HAD RUPTURED. THE MANUFACTURER WAS NOT CONTACTED. THE VEHICLE WAS REPAIRED. THE FAILURE MILEAGE WAS 105,000 AND THE CURRENT MILEAGE WAS 110,00.
NHTSA ODI #10448302
196,000 miles · Feb 13, 2012
Service Brakes, Hydraulic
HELP PLEASE. ANTI LOCK BRAKES LOCK UP OR GO TO FLOOR AT LOW SPEED. RECALL 05V379000 COVERS VEHICLES WITH THIS DEFECT REGISTERED IN COLD WEATHER STATES EXTENDING TO MARYLAND AND D.C. I LIVE IN VIRGINIA, BUT HAVE DRIVEN IN COVERED AREAS, INCLUDING MARYLAND, PENNSYLVANIA, WEST VIRGINIA AND D.C. MY VEHICLE HAS A SAFETY DEFECT THAT H…
Read full complaint
HELP PLEASE. ANTI LOCK BRAKES LOCK UP OR GO TO FLOOR AT LOW SPEED. RECALL 05V379000 COVERS VEHICLES WITH THIS DEFECT REGISTERED IN COLD WEATHER STATES EXTENDING TO MARYLAND AND D.C. I LIVE IN VIRGINIA, BUT HAVE DRIVEN IN COVERED AREAS, INCLUDING MARYLAND, PENNSYLVANIA, WEST VIRGINIA AND D.C. MY VEHICLE HAS A SAFETY DEFECT THAT HAS REQUIRED A RECALL. IT SHOULD NOT BE EXCLUDED SIMPLY BECAUSE IT IS REGISTERED ON THE OTHER SIDE OF A STATE LINE. *TR
NHTSA ODI #10447823
Mileage unknown · Feb 13, 2012
Engine And Engine Cooling
EXHAUST MANIFOLD BOLTS BREAKING OFF LEAVING STUDS IN THE HEADS (4) MY LATE 2002 CHEVY Z71 DEVELOPED AN EXHAUST LEAK AND THE CATALYTIC CONVERTER STARTED BANGING AT IDLE OR AFTER PARKED. ENGINE HAS BLACK EXHAUST ON THE HEAD WHERE WE FOUND THE MAIN LEAK. SO, CARBON MONOXIDE HAS BEEN COMING INTO THE CAB AND THE ENGINE COMPARTMENT…
Read full complaint
EXHAUST MANIFOLD BOLTS BREAKING OFF LEAVING STUDS IN THE HEADS (4) MY LATE 2002 CHEVY Z71 DEVELOPED AN EXHAUST LEAK AND THE CATALYTIC CONVERTER STARTED BANGING AT IDLE OR AFTER PARKED. ENGINE HAS BLACK EXHAUST ON THE HEAD WHERE WE FOUND THE MAIN LEAK. SO, CARBON MONOXIDE HAS BEEN COMING INTO THE CAB AND THE ENGINE COMPARTMENT SEEMS HOTTER THAN NORMAL. WHEN CHECKING INTO THE ISSUE, I FOUND EVERY TRUCK IN OUR COMPANY FLEET HAS THIS SAME ISSUE AND OUR ASSOCIATES THAT HAVE PERSONAL TRUCKS DRIVING TO WORK CHECKED THEIRS AND THEY ALSO HAVE THE SAME ISSUE. FROM 1999 THRU 2008 YEARS. WHEN CONTACTING OUR LOCAL CHEVY DEALER, THEY ADVISED THEY HAD NEVER SEEN OR HEARD OF ANY ISSUES LIKE THIS. I FIND THAT HARD TO BELIEVE. EVERY PERSON I MENTION THIS TO, CHECKS THEIR TRUCK AND HAS THE SAME ISSUES WITH THE BROKEN BOLTS. THERE IS DEFINITELY A PROBLEM WITH THE EXHAUST MANIFOLD CONTRACTING AND EXPANDING TOO MUCH- CHEAP STEEL ATTACHED TO ALUMINUM HEADS APPEAR ON ALL OF THE V-8 TRUCK ENGINES. PLEASE LOOK INTO THIS AS A SAFETY ISSUE WITH HEAT AND CARBON MONOXIDE AS WELL AS THE COSTS TO REPAIR. *TR
NHTSA ODI #10447714
147,059 miles · Feb 4, 2012
Parking BrakeService Brakes, Hydraulic
SEVERE BRAKE FLUID LEAK ON MAIN STEEL LINE(S) UNDER DRIVERS SIDE ABOUT 1/2 WAY TOWARD THE REAR WHEELS. UNABLE TO DRIVE VEHICLE. PEDAL WENT TO FLOOR AS I WAS TRYING TO PUT THE VEHICLE IN GEAR. PUMPED BRAKES WITH NO INCREASE IN PEDAL. LOOKED UNDER VEHICLE AND BRAKE FLUID ON CEMENT. *KB
NHTSA ODI #10446640
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