NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
468 reports107,400 miles · Jun 13, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 15 TO 20 MPH AND DEPRESSING THE BRAKES WHEN THE ANTI-LOCK BRAKES ACTIVATED ABNORMALLY, CAUSING THE REAR BRAKE LINE TO FRACTURE. THE VEHICLE WAS THEN TOWED AND REPAIRED BY THE OWNER FOR THE FRONT AND REAR HUB ASSEMBLIES. THE MANUFACTURER W…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT WAS DRIVING APPROXIMATELY 15 TO 20 MPH AND DEPRESSING THE BRAKES WHEN THE ANTI-LOCK BRAKES ACTIVATED ABNORMALLY, CAUSING THE REAR BRAKE LINE TO FRACTURE. THE VEHICLE WAS THEN TOWED AND REPAIRED BY THE OWNER FOR THE FRONT AND REAR HUB ASSEMBLIES. THE MANUFACTURER WAS CONTACTED AND OFFERED NO ASSISTANCE. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 107,400. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10406200
150,000 miles · May 3, 2011
Fuel System, Gasoline
THE FUEL LEVEL SENDING UNIT IN MY 2001 CHEVROLET SILVERADO IS TOTALLY INACCURATE. ABOUT A YEAR AFTER I PURCHASED THE TRUCK IN 2005 THE FUEL GAUGE BECAME SPORADIC, RANDOMLY GOING TO EMPTY THEN BACK TO FULL AND EVERY WHERE IN BETWEEN. THIS WOULD MOSTLY HAPPEN WHEN THE TRUCK WAS LOWER ON FUEL. AS THE NEXT COUPLE YEARS PASTED BY IT…
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THE FUEL LEVEL SENDING UNIT IN MY 2001 CHEVROLET SILVERADO IS TOTALLY INACCURATE. ABOUT A YEAR AFTER I PURCHASED THE TRUCK IN 2005 THE FUEL GAUGE BECAME SPORADIC, RANDOMLY GOING TO EMPTY THEN BACK TO FULL AND EVERY WHERE IN BETWEEN. THIS WOULD MOSTLY HAPPEN WHEN THE TRUCK WAS LOWER ON FUEL. AS THE NEXT COUPLE YEARS PASTED BY IT GOT WORSE AND WORSE. FINALLY IN 2009 I REPLACED THE UNIT AND FUEL PUMP. THE KIT INCLUDED AND NEW CONNECTOR FOR THE WIRING HARNESS, SO I WAS HOPEFUL THIS WOULD RESOLVE THE ISSUE. WELL AFTER ABOUT A YEAR OR LESS I STARTED HAVING ISSUES AGAIN. THIS TIME THE FUEL GAUGE DOES NOT RANDOMLY GO ALL THE WAY TO EMPTY OR FULL RANDOMLY, BUT ONCE IT GETS PAST 3/4 OF A TANK IT CANNOT BE TRUSTED ANYMORE. ESPECIALLY ONCE YOU GET PAST THE 1/4 OF A TANK IT LOOSES ALL ACCURACY. ALLOT OF TIMES IT WHEN I START THE TRUCK IT WILL BE AT 1/8 OF A TANK BUT AS I START DRIVING IT WILL GO UP TO A 1/4 OF A TANK. OR VISA VERSA. I LIVE IN A FLAT PART OF THE COUNTRY AND THIS HAS NOTHING TO DO WITH HILLS. LAST TIME I FILLED UP IT SAID I HAD A LITTLE LESS THEN A 1/8 OF A TANK (ABOUT 3 GALLONS, 26 GALLON TANK) AND WHEN I FILLED IT UP I PUT ALMOST 26 GALLONS IN. I WOULD REPLACE IT, BUT I DON'T WANT THE SAME THING TO START HAPPENING AGAIN. *TR
NHTSA ODI #10398729
Mileage unknown · Apr 20, 2011
Fuel System, Gasoline
2001 CHEVY SILVERADO'S GAS GAUGE SHOWS EMPTY AND THE GAS LIGHT COMES ON EVEN WITH A FULL TANK RAISING THE RISK OF RUNNING OUT OF GAS ON THE HIGHWAY OR IN AN UNSAFE LOCATION. QUOTES TO FIX THE PROBLEM RANGE FROM $500 - $800. *TR
NHTSA ODI #10396951
89,000 miles · Apr 17, 2011
Service Brakes, Hydraulic
BRAKE FAILURE. *TR
NHTSA ODI #10396543
157,000 miles · Mar 24, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THAT THE FRONT AND REAR BRAKES WERE RUSTED FROM THE BRAKE LINE TO THE ABS CONTROL UNIT. THE VEHICLE WAS NOT TAKEN TO THE DEALER OR AN INDEPENDENT MECHANIC FOR REPAIRS OR DIAGNOSIS. THE FAILURE MILEAGE WAS 157,000 AND THE CURRENT MILEAGE WAS 158,000.
NHTSA ODI #10392789
147,000 miles · Mar 23, 2011
Structure
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO K1500. THE CONTACT STATED THAT WHILE TRYING TO CHANGE A FLAT TIRE THE SPARE TIRE WOULD NOT LOWER FROM THE CABLE SYSTEM. THE CONTACT WAS UNABLE TO CHANGE THE TIRE DUE TO THE CABLE SYSTEM FOR THE SPARE MALFUNCTION. THE CONTACT HAD TO PURCHASE A USED TIRE TO CHANGE THE FLAT TIRE. THE …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO K1500. THE CONTACT STATED THAT WHILE TRYING TO CHANGE A FLAT TIRE THE SPARE TIRE WOULD NOT LOWER FROM THE CABLE SYSTEM. THE CONTACT WAS UNABLE TO CHANGE THE TIRE DUE TO THE CABLE SYSTEM FOR THE SPARE MALFUNCTION. THE CONTACT HAD TO PURCHASE A USED TIRE TO CHANGE THE FLAT TIRE. THE CONTACT TOOK THE VEHICLE TO THE DEALER IN ORDER TO EXPLAIN WHAT HAPPENED WITH THE SPARE TIRE. THE DEALER INFORMED THE CONTACT THAT A DIAGNOSTIC TEST NEEDED TO BE PERFORMED. THE CONTACT STATED THAT THE FAILURE WAS A MANUFACTURERS DEFECT. THE FAILURE MILEAGE WAS 147,000. UPDATED 1/13/2012 *LN *TR
NHTSA ODI #10392596
115,000 miles · Mar 14, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS TRAVELING 35 MPH WHEN HE HAD TO ABRUPTLY APPLY THE BRAKES TO AVOID CRASHING INTO A VEHICLE THAT DROVE INTO HIS LANE. THERE WAS AN UNUSUAL INCREASE IN STOPPING DISTANCE AND TIME. THE CONTACT INSPECTED THE VEHICLE AND DISCOVERED THAT THE BRAKE LINES FROM THE MASTER C…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS TRAVELING 35 MPH WHEN HE HAD TO ABRUPTLY APPLY THE BRAKES TO AVOID CRASHING INTO A VEHICLE THAT DROVE INTO HIS LANE. THERE WAS AN UNUSUAL INCREASE IN STOPPING DISTANCE AND TIME. THE CONTACT INSPECTED THE VEHICLE AND DISCOVERED THAT THE BRAKE LINES FROM THE MASTER CYLINDER TO THE ABS UNIT AND FROM THE ABS UNIT TO THE FRONT BRAKES WERE CORRODED. THE FAILURE MILEAGE AND CURRENT MILEAGE WAS 115,000.
NHTSA ODI #10390130
36,669 miles · Mar 10, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THE ABS SPEED SENSOR WAS REPLACED UNDER THE WARRANTY IN 2003 BUT THE REPAIR DID NOT CORRECT THE FAILURE. WHILE DRIVING AT APPROXIMATELY 10 MPH, HE ATTEMPTED TO BRAKE AND THE ABS ENGAGE. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT THE ANTI-LOCK…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 1500. THE CONTACT STATED THE ABS SPEED SENSOR WAS REPLACED UNDER THE WARRANTY IN 2003 BUT THE REPAIR DID NOT CORRECT THE FAILURE. WHILE DRIVING AT APPROXIMATELY 10 MPH, HE ATTEMPTED TO BRAKE AND THE ABS ENGAGE. THE MANUFACTURER WAS CONTACTED AND THEY ADVISED HIM THAT THE ANTI-LOCK HYDRAULIC REPAIR WAS PERFORMED IN 2005 UNDER RECALL NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTI-LOCK HYDRAULIC). THE CONTACT STATED THE RECALL REPAIR WAS PERFORMED ON THE VEHICLE BUT THE MAUNFACTURER WOULD NOT ASSIST. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 36,669, AND THE CURRENT FAILURE WAS 90,000. UPDATED 03/31/11*LJ UPDATED 1/13/2012 *LN THE CONSUMER STATED BOTH FRONT HUB ASSEMBLIES WERE REPLACED. *TR
NHTSA ODI #10389755
50,000 miles · Mar 10, 2011
Parking BrakeService Brakes, Hydraulic
HYDRAULIC BRAKE FAILURE. NHTSA ACTION NUMBER:PEO5020 WAS TOLD BY THE DEALER THIS WAS LIKELY THE "WHEEL SPEED SENSOR" AND REQUIRED A COMPLETE WHEEL BEARING REPLACEMENT AS THAT IS THE ONLY WAY THE "WHEEL SPEED SENSOR" COULD BE REPLACED. I BECAME SUSPICIOUS AFTER LOOKING AT THE "SERVICE ADVISORS" WRIT-UP WHICH WAS NOTHING LIKE I HA…
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HYDRAULIC BRAKE FAILURE. NHTSA ACTION NUMBER:PEO5020 WAS TOLD BY THE DEALER THIS WAS LIKELY THE "WHEEL SPEED SENSOR" AND REQUIRED A COMPLETE WHEEL BEARING REPLACEMENT AS THAT IS THE ONLY WAY THE "WHEEL SPEED SENSOR" COULD BE REPLACED. I BECAME SUSPICIOUS AFTER LOOKING AT THE "SERVICE ADVISORS" WRIT-UP WHICH WAS NOTHING LIKE I HAD DESCRIBED TO HIM OR THE MECHANIC AND NOTHING LIKE THEY HAD TOLD ME THE REPAIR WAS. WHEN CONFRONTING THE "SERVICE ADVISOR" ABOUT THE WAY IT WAS WRITTEN UP, HIS RESPONSE WAS "THIS WAS MY WAY OF WRITING IT UP". AFTER LOOKING UP THE NHTSA INFORMATION WHICH I PRINTED OUT, IT APPEARS THE MANUFACTURER WAS TO PAY FOR THE COMPLETE REPAIR. I WAS CHARGED BY THE DEALER FOR THE COMPLETE REPAIR. AFTER GETTING HOME I SEARCHED THE INTERNET FOR RECALLS AND HERE I AM - LOOKING FOR HELP IN THIS FRAUD BY THE DEALER. I AM NOW SUSPICIOUS THAT THEY MIGHT BE DOUBLE CHARGING - IE: CHARGE THE CUSTOMER AND ALSO CHARGE GM? ANOTHER REPAIR I HAD COMPLETED AT THE SAME TIME WAS A DEFECTIVE PARKING BRAKE - TOTAL FAILURE. NHTSA ACTION NUMBER: EAO4011 WAS TOLD BY THE DEALER MECHANIC THE LININGS WEAR EVEN WHEN THE PARKING BRAKE WAS NOT APPLIED. REQUIRED LININGS AND OTHER PART REPLACEMENT FOR WHICH I WAS ALSO CHARGED. IN THE RECALL VEHICLES I DID NOT SEE MY VEHICLE HOWEVER THE MECHANIC DESCRIBED THE CONDITION JUST AS THE RECALL NOTICE DESCRIBED IT SO I'M THINKING THIS VEHICLE MIGHT ALSO BE INCLUDED? THEY ALSO RECOMMENDED A BRAKE FLUSH - WHICH I HAD DONE AND NOW AM THINKING THIS MIGHT HAVE BEEN REQUIRED WHEN THE RECALL WORK WAS COMPLETED? I FIRST STARTED NOTICING THE PROBLEM (NHTSA ACTION NUMBER: PEO5020) WHEN PULLING INTO PARKING SPACES THIS WINTER HOWEVER DISMISSED IT AT FIRST THINKING I MAY HAVE BEEN ON ICE. I CAME VERY CLOSE TO SMASHING INTO A BLOCK WALL ON ONE OCCASION, A FENCE AND PARKING CURB ON OTHERS. THANKS. THANKS. *TR
NHTSA ODI #10389713
80,800 miles · Mar 1, 2011
Service Brakes, HydraulicCrash
SPEED WHEEL SENSOR FAILURE, GM DO NOT WANT TO BE RESPONSIBLE FOR THE SAFETY RECALL, THEY GAVE ME A CASE NUMBER, AND TOLD ME BECAUSE I WAS THE SECOND OWNER WARRANTY DOES NOT COVER TO FIX THE PROBLEM. *TR
NHTSA ODI #10386118
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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