NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports92,600 miles · Sep 8, 2010
Service Brakes, Hydraulic
I STARTED THE TRUCK, PUT IT INTO DRIVE AND PROCEEDED TO THE END OF MY ALLEY. I STEPPED ON THE BRAKE PEDAL WHICH WENT DOWN MORE THEN NORMAL AND THE TRUCK DID NOT STOP UNTIL I APPLIED MORE PRESSURE TO THE BRAKE PEDAL WHICH CAUSED THE REAR WHEELS TO SKID AND STOP THE TRUCK, I CAREFULLY AND SLOWLY REVERSED THE TRUCK BACK INTO THE D…
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I STARTED THE TRUCK, PUT IT INTO DRIVE AND PROCEEDED TO THE END OF MY ALLEY. I STEPPED ON THE BRAKE PEDAL WHICH WENT DOWN MORE THEN NORMAL AND THE TRUCK DID NOT STOP UNTIL I APPLIED MORE PRESSURE TO THE BRAKE PEDAL WHICH CAUSED THE REAR WHEELS TO SKID AND STOP THE TRUCK, I CAREFULLY AND SLOWLY REVERSED THE TRUCK BACK INTO THE DRIVE WAY AND PARKED IT. THERE WAS A WET SPOT IN THE ALLEY THAT UPON INSPECTION WAS BRAKE FLUID. LOOKING UNDER THE TRUCK THERE WAS BRAKE FLUID DRIPPING FROM A RUSTED THRU BRAKE LINE ON THE LEFT SIDE OF THE TRUCK UNDER ABOUT WHERE YOUR LEFT FOOT WOULD BE WHILE SITTING IN THE TRUCK. THE TRUCK WAS TOWED TO THE CHEVY DEALER TO BE REPAIRED. THE SERVICE ADVISOR TOLD ME BRAKE LINE FAILURE IS NOT UNCOMMON IN THE VINTAGE TRUCK. THE TOW TRUCK DRIVER TOLD ME MINE WAS THE 3RD TUCK HE TOWED TODAY WITH THE SAME CONDITION. I DO NOT WANT THIS INCIDENT REPORT TO REFLECT BADLY ON THE DEALERSHIP WHO HAS ALWAYS BEEN THERE FOR ME AND MY FAMILY. BURSTING BRAKE LINES ON THE HIGHWAY CAUSES ME GREAT CONCERN. I WAS TOLD THE REPLACEMENT BRAKE LINE IS OF THE SAME STEEL MATERIAL AS THE FAILED PART AND NOT STAINLESS STEEL. *TR
NHTSA ODI #10354478
101,000 miles · Sep 4, 2010
Service Brakes, Hydraulic
I OWN A 2001 CHEVROLET 2500 HD TRUCK. I HAVE HAD BRAKE FAILURE 4 TIMES WITHIN THE PAST 3 YEARS DUE TO RUSTED BRAKE LINES. ONCE WHILE PULLING A HORSE TRAILER GOING UP AND DOWN HILLS. LUCKILY THERE WAS NO TRAFFIC IN FRONT ABLE TO COAST SAFELY TO THE SIDE OF THE ROAD. ANOTHER TIME WHILE DRIVING INTO THE CITY. SAME THING. LUCK…
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I OWN A 2001 CHEVROLET 2500 HD TRUCK. I HAVE HAD BRAKE FAILURE 4 TIMES WITHIN THE PAST 3 YEARS DUE TO RUSTED BRAKE LINES. ONCE WHILE PULLING A HORSE TRAILER GOING UP AND DOWN HILLS. LUCKILY THERE WAS NO TRAFFIC IN FRONT ABLE TO COAST SAFELY TO THE SIDE OF THE ROAD. ANOTHER TIME WHILE DRIVING INTO THE CITY. SAME THING. LUCKILY NO ONE IN FRONT. AND RECENTLY WHILE DRIVING THE TRAILER AGAIN LOADED WITH HORSES THE LINE HAD RUSTED THRU AGAIN IN ANOTHER PLACE. THE TRUCK HAS BEEN INTO MIDAS IN FRANKFORT KENTUCKY 2 TIMES TO REPAIR RUSTED BRAKE LINES. THE OTHER TWO TIMES HAVE TAKEN TO A LOCAL MECHANIC. EVERY MECHANIC COMMENTS ABOUT THE RUST ON THE UNDERCARRIAGE. ALSO THE FACE PLACE FOR THE REAR AXEL THAT HOLDS THE OIL FOR THE REAR DRIVE HAS RUSTED THRU AND BEEN REPLACED ONCE BECAUSE THE LUBRICANT WAS LEAKING OUT OF IT. THIS WAS DONE THRU A CHEVROLET DEALER TWO YEARS AGO. THE PLATE IS AGAIN VERY RUSTED AND WHO KNOWS WHEN IT WILL HAVE TO BE REPLACED. THE TRUCK IS NOT DRIVEN VERY MUCH ANYMORE SINCE IT IS NOT RELIABLE. THE ONLY OTHER ALTERNATIVE THAT I HAVE IS TO REPLACE EVERY SINGLE BRAKE LINE WHICH IS TOO COSTLY FOR ME AT THIS TIME. I BELIEVE WITH ALL THAT I HAVE READ THAT THIS IS A RECURRING PROBLEM THAT CHEVY HAD WITH THEIR TRUCKS. THE TRUCK IS SITTING IN THE DRIVE RIGHT NOW WITH THE MOST RECENT BRAKE LINE FAILURE. THE MOST RECENT ONE GOES FROM THE DRIVERS FRONT WHEEL SIDE TO THE PASSENGER SIDE FRONT WHEEL. TOO MUCH RUST AND YOU NEVER KNOW WHEN THE BRAKES WILL FAIL WHEN RIDING IN THIS VEHICLE. THANK YOU *TR
NHTSA ODI #10353890
60,000 miles · Sep 1, 2010
Power Train
TRUCK STALLED IN TRAFFIC IN DRIVE GEAR. WOULD NOT START WITHOUT A SHORT COOL DOWN PERIOD. THE CRANKSHAFT POSITION SENSOR WAS REPLACED BY G.M. *TR
NHTSA ODI #10353389
100,000 miles · Aug 30, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 65 MPH, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAITED FOR ONE HOUR BEFORE THE VEHICLE WOULD RESTART AND RESUME NORMAL OPERATION; HOWEVER, WHILE TRAVELING THE STALLING FAILURE RECURRED. IN ADDITION, THE FAILURE OCCURRED ON A SEPARATE OCCA…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 65 MPH, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAITED FOR ONE HOUR BEFORE THE VEHICLE WOULD RESTART AND RESUME NORMAL OPERATION; HOWEVER, WHILE TRAVELING THE STALLING FAILURE RECURRED. IN ADDITION, THE FAILURE OCCURRED ON A SEPARATE OCCASION AND THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THEY INFORMED THE CONTACT THAT THE CRANK SHAFT POSITION SENSOR WOULD NEED TO BE REPLACED. THERE WAS A RECALL ASSOCIATED WITH NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). THE VIN WAS EXCLUDED FROM THE RECALL. THE VEHICLE HAD NOT BEEN REPAIRED AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS 100,000.
NHTSA ODI #10352784
28,328 miles · Aug 29, 2010
Tires
WHILE DRIVING ON THE HIGHWAY AT 65MPH MY REAR TIRE HAD THE TREAD SEPARATE FROM THE TIRE. *TR
NHTSA ODI #10352621
92,000 miles · Aug 20, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING LESS THAN 5 MPH, THE CONTACT ENGAGED THE BRAKE PEDAL AND THE ANTI-LOCK BRAKE SYSTEM ACTIVATED INDEPENDENTLY. THE FAILURE WOULD OCCUR WHENEVER THE BRAKES WERE APPLIED AT LESS THAN 5 MPH. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE FAILURE WAS CO…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING LESS THAN 5 MPH, THE CONTACT ENGAGED THE BRAKE PEDAL AND THE ANTI-LOCK BRAKE SYSTEM ACTIVATED INDEPENDENTLY. THE FAILURE WOULD OCCUR WHENEVER THE BRAKES WERE APPLIED AT LESS THAN 5 MPH. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE FAILURE WAS CONTRIBUTED TO THE SPEED SENSOR. THERE WAS A RECALL ASSOCIATED WITH THE NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK). THE CONTACTS VIN WAS EXCLUDED FROM THE RECALL. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 92,000.
NHTSA ODI #10350760
65,000 miles · Aug 15, 2010
Electrical System
MY 2001 CHEVY WITH THE 8100 ENGINE WOULD STALL AT SPEED AND ALSO AT IDLE. THE AT-SPEED STALL WOULD RESTART ON ITS OWN WITHIN 3 OR 4 SECONDS. THE AT-IDLE STALL WOULD REQUIRE SOME ENGINE CRANKING BUT IT WOULD RESTART.(ODOMETER READING WAS 105,000KM)THERE IS A RECALL FOR THIS ENGINE (CRANK POSITIONING SENSOR)HOWEVER MY VIN IS OUTS…
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MY 2001 CHEVY WITH THE 8100 ENGINE WOULD STALL AT SPEED AND ALSO AT IDLE. THE AT-SPEED STALL WOULD RESTART ON ITS OWN WITHIN 3 OR 4 SECONDS. THE AT-IDLE STALL WOULD REQUIRE SOME ENGINE CRANKING BUT IT WOULD RESTART.(ODOMETER READING WAS 105,000KM)THERE IS A RECALL FOR THIS ENGINE (CRANK POSITIONING SENSOR)HOWEVER MY VIN IS OUTSIDE OF THE RECALL. DEALER NOT SURE WHAT TO DO. I HAD THEM REPLACE THE SENSOR AT MY EXPENSE. THIS MOVE RESOLVED THE STALL PROBLEM. IT HAS NEVER STALLED AGAIN. QUESTION: WHY WOULD MY VIN NOT BE INCLUDED IN THE RECALL....SAME SYMPTOMS ...SAME SOLUTION AS THE RECALL ! *TR
NHTSA ODI #10349478
90,000 miles · Aug 13, 2010
Electrical System
STARTING THE TRUCK START DRIVING AT DIFFERENT SPEEDS AND THE TRUCK JUST SHUTS DOWN. LET THE TRUCK SIT FOR A FEW MINUTES AND IT WILL RESTART. SEARCH THE INTERNET AND TALKED TO THE LOCAL DEALERSHIP MECHANICS AND THEY ALL SAID THAT THE CRANK SENSOR IS THE PROBLEM. *TR
NHTSA ODI #10349223
50,000 miles · Aug 3, 2010
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 40-45 MPH, THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO RESTART THE VEHICLE AS IT RESUMED NORMAL OPERATION. THE DEALER REPLACED THE BATTERY BUT TO NO AVAIL. THE CONTACT STATED THE FAILURE WOULD ONLY OCCUR IN DRY WEATHER CONDITIONS. THE V…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 40-45 MPH, THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO RESTART THE VEHICLE AS IT RESUMED NORMAL OPERATION. THE DEALER REPLACED THE BATTERY BUT TO NO AVAIL. THE CONTACT STATED THE FAILURE WOULD ONLY OCCUR IN DRY WEATHER CONDITIONS. THE VEHICLE WAS TAKEN TO THE DEALER SEVERAL TIMES BUT THE FAILURE PERSISTED. MOST RECENTLY, THE FAILURE RECURRED AND THE VEHICLE INDEPENDENTLY RESTARTED. THE DEALER ADVISED THAT THE CRANK SHAFT WOULD NEED TO BE REPLACED TO CORRECT THE FAILURE. THE VEHICLE WAS LEFT WITH THE DEALER WHERE THE CONTACT WAS AWAITING REPAIRS. THE CONTACT REFERENCED NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) BUT WAS UNABLE TO CONFIRM IF HIS VIN WAS INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS 50,000 AND THE CURRENT MILEAGE WAS 56,000.
NHTSA ODI #10347028
100,000 miles · Jul 31, 2010
Service Brakes, Hydraulic
WE WERE JUST HEADING DOWN OUR DRIVE ON VACATION TOWING OUR TRAVEL TRAILER WHEN MY HUSBAND COULD NOT STOP THE TRUCK. THE BRAKES HAD STOPPED WORKING. WE FOUND OUT THE BRAKE LINE HAD CORRODED AND WAS LEAKING BRAKE FLUID. WE TOOK THE VEHICLE TO A LOCAL REPAIR SHOP WHO FIXED THE BRAKE LINE AND WE CONTINUED ON OUR TRIP. WE RETURNED …
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WE WERE JUST HEADING DOWN OUR DRIVE ON VACATION TOWING OUR TRAVEL TRAILER WHEN MY HUSBAND COULD NOT STOP THE TRUCK. THE BRAKES HAD STOPPED WORKING. WE FOUND OUT THE BRAKE LINE HAD CORRODED AND WAS LEAKING BRAKE FLUID. WE TOOK THE VEHICLE TO A LOCAL REPAIR SHOP WHO FIXED THE BRAKE LINE AND WE CONTINUED ON OUR TRIP. WE RETURNED YESTERDAY AND MY HUSBAND MOVED THE TRUCK THIS MORNING AND ANOTHER CORRODED BRAKE LINE BLEW! I THANK GOD THIS DID NOT HAPPEN AS WE WERE DRIVING OUR TRAILER THROUGH THE MOUNTAINS OR OUR FAMILY WOULD NOT BE HERE TO TALK ABOUT IT. LOOKS LIKE WE WILL BE REPLACING ALL THE BRAKE LINES TODAY OUT OF CONCERN FOR OUR SAFETY. *TR
NHTSA ODI #10346464
NHTSA investigations
3EA06016 · Crank Position Sensor Failure - Stall
Opened Sep 14, 2006 · Closed Nov 9, 2007
Status: closed (inferred from source dates) · Engine And Engine Cooling; Engine And Engine Cooling:engine
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
Additional source detail variants (2)
Engine And Engine Cooling:engine
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
Engine And Engine Cooling
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
EA04012 · Hydraulic Pump Failres
Opened Apr 30, 2004 · Closed Feb 28, 2005
Status: closed (inferred from source dates) · Service Brakes, Hydraulic:power Assist; Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Additional source detail variants (2)
Service Brakes, Hydraulic:power Assist
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
PE04004 · Hydraulic Pump Shaft Failures
Opened Jan 8, 2004 · Closed Apr 30, 2004
Status: closed (inferred from source dates) · Service Brakes, Hydraulic; Service Brakes, Hydraulic:power Assist; Service Brakes, Hydraulic:power Assist:hydraulic; Steering:hydraulic Power Assist System; Steering:hydraulic Power Assist:pump
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Additional source detail variants (5)
Service Brakes, Hydraulic
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Service Brakes, Hydraulic:power Assist
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Service Brakes, Hydraulic:power Assist:hydraulic
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Steering:hydraulic Power Assist:pump
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Steering:hydraulic Power Assist System
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
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