NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
587 reportsMileage unknown · Nov 9, 2005
Power TrainService Brakes, HydraulicWheels
DT: THE CONSUMER STATED THAT THE ANTI LOCK BRAKES WERE ACTIVATING AT LOW SPEEDS. THE VEHICLE WAS TAKEN TO THE DEALERSHIP, AND THEY CLEANED THE FRONT HUBS OF RUST. THEN THE ABS WORKED PROPERLY, BUT THE ABS AND BRAKE LIGHT WOULD COME ON. THE VEHICLE WAS TAKEN BACK TO THE DEALERSHIP, AND THEY FOUND THAT THERE WAS AN INTERNAL EL…
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DT: THE CONSUMER STATED THAT THE ANTI LOCK BRAKES WERE ACTIVATING AT LOW SPEEDS. THE VEHICLE WAS TAKEN TO THE DEALERSHIP, AND THEY CLEANED THE FRONT HUBS OF RUST. THEN THE ABS WORKED PROPERLY, BUT THE ABS AND BRAKE LIGHT WOULD COME ON. THE VEHICLE WAS TAKEN BACK TO THE DEALERSHIP, AND THEY FOUND THAT THERE WAS AN INTERNAL ELECTRICAL FAILURE IN THE BRAKE CONTROL MODULE. THEY PERFORMED NHTSA RECALL 05V379000 REPAIRS. WHEN DRIVING THE VEHICLE OFF OF THE LOT IT ALMOST HIT ANOTHER CAR. THE VEHICLE WAS TAKEN BACK TO THE SERVICE DEPARTMENT AND THEY DISCONNECTED THE FUSE FOR THE ABS AND THE ABS LIGHT STAYED ON. THE VEHICLE WOULD NOT PASS INSPECTION. THE CONSUMER CONTACTED GM AND THEY STATED THAT THE PROBLEM WAS NOT RELATED TO THE RECALL AND THE CONSUMER WOULD HAVE TO PAY FOR REPAIRS OUT OF POCKET. *AK (12/01/05) THE TOW HAUL MODE WAS INOPERATIVE. *SC
NHTSA ODI #10142293
95,000 miles · Oct 31, 2005
Service Brakes, HydraulicStructure
DT: THE CONTACT IS HAVING A PROBLEM WITH THE ABS. IT IS ENGAGING AT LOW SPEEDS AT 5 MPH. THIS HAS BEEN A CONTINUING PROBLEM FOR THE PAST TWO YEARS. HE PULLED THE ABS FUSE TO GET THE ABS DEACTIVATED. THE VEHICLE IS RUNNING CORRECTLY NOW THAT THE FUSE HAS BEEN REMOVED. HE CONTACTED GM, AND WAS INFORMED THAT THERE WERE NO RECALLS O…
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DT: THE CONTACT IS HAVING A PROBLEM WITH THE ABS. IT IS ENGAGING AT LOW SPEEDS AT 5 MPH. THIS HAS BEEN A CONTINUING PROBLEM FOR THE PAST TWO YEARS. HE PULLED THE ABS FUSE TO GET THE ABS DEACTIVATED. THE VEHICLE IS RUNNING CORRECTLY NOW THAT THE FUSE HAS BEEN REMOVED. HE CONTACTED GM, AND WAS INFORMED THAT THERE WERE NO RECALLS ON THIS VEHICLE. ALSO, HE STATES THAT THE STRAPS ON THE TAILGATE ARE NOT HOLDING CORRECTLY. *AK
NHTSA ODI #10141323
80,000 miles · Oct 31, 2005
Service Brakes, Hydraulic
FAILURE OF ANTILOCK BRAKES. BRAKES COME ON AT LOW SPEEDS ALMOST CAUSING ACCIDENTS. *NM
NHTSA ODI #10141278
77,000 miles · Oct 19, 2005
Service Brakes, Hydraulic
DT: THERE IS A RECALL ON THE ANTI LOCK BRAKES . THE CONTACT'S VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN. THE BRAKES GRAB ONLY AT LOW SPEEDS. THE CONTACT IS EXPERIENCING THE SAME SYMPTOMS AS INDICATED IN THE RECALL BUT THE VEHICLE IS NOT INCLUDED. THE VEHICLE HAS NOT BEEN TO A DEALER OR SERVICE REPAIR SHOP. THE C…
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DT: THERE IS A RECALL ON THE ANTI LOCK BRAKES . THE CONTACT'S VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN. THE BRAKES GRAB ONLY AT LOW SPEEDS. THE CONTACT IS EXPERIENCING THE SAME SYMPTOMS AS INDICATED IN THE RECALL BUT THE VEHICLE IS NOT INCLUDED. THE VEHICLE HAS NOT BEEN TO A DEALER OR SERVICE REPAIR SHOP. THE CONTACT HAS CALLED CHEVROLET ,WHO OFFERED NO ASSISTANCE OTHER THAN FILING A COMPLAINT. NO REPAIRS OR CORRECTIONS AT THIS TIME. *AK
NHTSA ODI #10140235
Mileage unknown · Sep 22, 2005
Fuel System, OtherStructure
TAIL GATE STRAPS BROKE. FUEL GAUGE IS INCONSISTENT AND GM HAS TO KNOW ABOUT IT BECAUSE THERE ARE FORUMS ALL OVER THE WEB STATING THE SAME THINGS I AM. I THINK THESE ARE RIDICULOUS PROBLEMS THAT GM IS NOT FACING UP TO. *JB
NHTSA ODI #10137278
Mileage unknown · Sep 8, 2005
Electrical SystemEngine And Engine CoolingService Brakes, Hydraulic
ANTILOCK BRAKE ILLUMINATION ON PANEL GOES ON AND OFF FOR NO APPARENT REASON. BRAKES, ROTORS AND DRUMS WERE CHECKED, VARIOUS OTHER PROBLEMS INCLUDE,WATER PUMP REPLACED, STARTER REPLACED, RADIATOR REPLACED, HEATER CORE PROBLEMS,ALTERNATOR REPLACED, CERTAIN ILLUMINATION LIGHTS ON RADIO COME ON. *NM
NHTSA ODI #10135863
Mileage unknown · Aug 18, 2005
Service Brakes, Hydraulic
MY 1999 SILVERADO PICKUP TRUCK IS HAVING BRAKING TROUBLE WHERE THE ABS SYSTEM KICKS ON DURING NORMAL DRY CONDITIONS. IT HAS CAUSED ME TO HAVE SOME NEAR MISSES WHILE TRYING TO STOP THE VEHICLE.*JB
NHTSA ODI #10133273
50,000 miles · Aug 18, 2005
Fuel System, Other
THE FUEL SENDING UNIT ON MY TRUCK IS DEFECTED. THE FUEL GAUGE IS SPORADIC. IT JUMPS FROM FULL TO EMPTY WHETHER IT IS FULL, OR HALF-FULL, OR NEAR EMPTY. I'VE TALKED WITH SEVERAL CHEVROLET/GMC TRUCK OWNERS WHO HAVE THE SAME PROBLEM. ON A CHEVROLET INTERNET FORUM (HTTP://WWW.GM-TRUCKS.COM), THE MAJORITY OF CHEVROLET/GMC TRUCK-O…
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THE FUEL SENDING UNIT ON MY TRUCK IS DEFECTED. THE FUEL GAUGE IS SPORADIC. IT JUMPS FROM FULL TO EMPTY WHETHER IT IS FULL, OR HALF-FULL, OR NEAR EMPTY. I'VE TALKED WITH SEVERAL CHEVROLET/GMC TRUCK OWNERS WHO HAVE THE SAME PROBLEM. ON A CHEVROLET INTERNET FORUM (HTTP://WWW.GM-TRUCKS.COM), THE MAJORITY OF CHEVROLET/GMC TRUCK-OWNERS HAVE REPORTED THE SAME FAILURE. SOME HAVE REPLACED THE SENDING UNIT AND THE PROBLEM WAS REMEDIED. I HAVE NOT FIXED THE PROBLEM DUE TO THE COST OF REPLACING THE UNIT AND THE LABOR REQUIRED TO DO SO. I BELIEVE THAT WITH A PROBLEM SO WIDE-SPREAD, THE DEVICE IS DEFECTIVE AND SHOULD BE RECALLED.*JB
NHTSA ODI #10133271
60,000 miles · Jun 9, 2005
Service Brakes, Hydraulic
I OWN A 1999 CHEVROLET SILVERADO MADE IN THE USA AND THE ABS SYSTEM FAILS TO STOP AT 5 MPH. THE VEHICLE WILL NOT STOP AND THE BRAKE HAS TO BE RELEASED AND PREASSURE REAPPLIED.
NHTSA ODI #10124647
59,376 miles · Jun 2, 2005
EquipmentService Brakes, Air
I HAVE A 1999 CHEVY SILVERADO K1500 EXTENDED CAB. I BOUGHT IT IN THE SUMMER OF 2002. BY JANUARY OF 2003, I BEGAN HAVING TROUBLE WITH THE ABS KICKING IN WHEN IS WAS SLOWING DOWN TO A STOP. THE ROADS WERE NOT WET OR SLIPPERY AND I ALMOST WENT INTO TRAFFIC SEVERAL TIMES (I HAVE ALSO ALMOST HIT A PARKED CAR PULLING IN A PARKING S…
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I HAVE A 1999 CHEVY SILVERADO K1500 EXTENDED CAB. I BOUGHT IT IN THE SUMMER OF 2002. BY JANUARY OF 2003, I BEGAN HAVING TROUBLE WITH THE ABS KICKING IN WHEN IS WAS SLOWING DOWN TO A STOP. THE ROADS WERE NOT WET OR SLIPPERY AND I ALMOST WENT INTO TRAFFIC SEVERAL TIMES (I HAVE ALSO ALMOST HIT A PARKED CAR PULLING IN A PARKING SPACE, AND ALMOST WENT OVER A STEEP EMBANKMENT SINCE THEN). I PAID OVER $300 IN FEBRUARY 2003 TO HAVE THEM FIXED AND THAT LASTED UNTIL FEBRUARY OF 2004. WHEN I ALMOST WENT OVER THE STEEP EMBANKMENT AT MY LOCAL GROCERY STORE WHEN I WAS PULLING INTO A PARKING SPACE, I DECIDED TO PULL THE FUSE. THE ONLY PROBLEM WITH THIS IS THAT YOU DON'T HAVE CRUISE ANY LONGER. I FINALLY DECIDED I HAD TO GET IT FIXED BECAUSE WE WANTED THE CRUISE FEATURE SO I GOT IT FIXED IN DECEMBER OF 2004. BY THAT TIME, THE CHEVROLET DEALERS ARE FINDING OUT THERE IS A PROBLEM AND THEY JUST NEED TO CLEAN OUT THE SENSOR WHICH NOW COSTS ABOUT $75 (THE DEALERSHIP I BOUGHT THE TRUCK FROM WOULDN'T EVEN ADMIT THERE WAS A PROBLEM). THE BIG PROBLEM IS THAT I DO NOT KNOW WHEN THEY WILL GIVE ME PROBLEMS AGAIN AND I AM STILL A LITTLE AFRAID TO DRIVE MY TRUCK. I HAVE 2 YOUNG CHILDREN AND I WOULD HATE TO BE IN AN ACCIDENT AND HURT THEM BECAUSE OF SOMETHING THAT CHEVY KNOWS ABOUT AND REFUSES TO DEAL WITH. I HAVE BEEN CHECKING ONLINE, AND I HAVE NOTICED A LOT OF PEOPLE ARE HAVING THE SAME PROBLEM. THIS IS A SERIOUS PROBLEM THAT NEEDS TO BE ADDRESSED BEFORE SOMEONE LOSES THEIR LIFE OVER IT.
NHTSA ODI #10124036
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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