NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
21 reportsClear category filter79,500 miles · Sep 28, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED WHILE DRIVING 50 MPH THE VEHICLE STALLED WITHOUT ANY WARNINGS. THE CONTACT MENTIONED THAT HE WAS ABLE TO TURN THE VEHICLE BACK ON BUT THE FAILURE PERSISTED. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHO DIAGNOSED THAT THE FUEL PUMP WAS DEFECTIVE AND NEEDED TO BE RE…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED WHILE DRIVING 50 MPH THE VEHICLE STALLED WITHOUT ANY WARNINGS. THE CONTACT MENTIONED THAT HE WAS ABLE TO TURN THE VEHICLE BACK ON BUT THE FAILURE PERSISTED. THE VEHICLE WAS TAKEN TO A LOCAL MECHANIC WHO DIAGNOSED THAT THE FUEL PUMP WAS DEFECTIVE AND NEEDED TO BE REPLACED. THE MECHANIC ALSO ADVISED THAT THE FUEL LINES NEEDED TO BE CLEANED. THE REMEDY FAILED TO REPAIR THE PROBLEM. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE BUT DID NOT OFFER ANY ASSISTANCE SINCE THE VEHICLE WAS NOT INCLUDED IN NHTSA RECALL CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING). THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 79,500 AND THE CURRENT MILEAGE WAS 80,000.
NHTSA ODI #10427773
113,000 miles · Aug 14, 2011
Engine And Engine Cooling
EXHAUST BOLTS BROKE OFF AND NOW GASKET HAS FAILED. *TR
NHTSA ODI #10419415
94,000 miles · Aug 2, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. WHILE DRIVING APPROXIMATELY 35 MPH, THE ENGINE STALLED WITHOUT WARNING. UPON RESTARTING, THE VEHICLE OPERATED NORMALLY AND WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS. THE TECHNICIAN INFORMED THE CONTACT THAT THE CRANKSHAFT POSITION SENSOR WAS FAULTY. THE VEHICLE WAS NOT REP…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. WHILE DRIVING APPROXIMATELY 35 MPH, THE ENGINE STALLED WITHOUT WARNING. UPON RESTARTING, THE VEHICLE OPERATED NORMALLY AND WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS. THE TECHNICIAN INFORMED THE CONTACT THAT THE CRANKSHAFT POSITION SENSOR WAS FAULTY. THE VEHICLE WAS NOT REPAIRED. THE FAILURE CONTINUED TO RECUR WHENEVER THE VEHICLE WAS IN MOTION. THE MANUFACTURER WAS NOT NOTIFIED OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 94,000. UPDATED 09/15/11 *BF THE CONSUMER LEARNED A RECALL HAD BEEN ISSUED FOR THE CRANKSHAFT POSITION SENSOR. HOWEVER, HIS VIN WAS NOT INCLUDED. UPDATED 11/04/11
NHTSA ODI #10416617
54,500 miles · Jun 24, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 15 MPH THE VEHICLE SUDDENLY STALLED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE CONTACT WAS INFORMED THAT THE CRANK SHAFT POSITION SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THERE WAS A RECALL UNDER NH…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 15 MPH THE VEHICLE SUDDENLY STALLED. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHERE THE CONTACT WAS INFORMED THAT THE CRANK SHAFT POSITION SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THERE WAS A RECALL UNDER NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) THAT MAY BE RELATED TO THE FAILURE. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT THE VIN WAS NOT INCLUDED IN THE RECALL. THE APPROXIMATE FAILURE MILEAGE WAS 54,500. UPDATED 08/31/11*LJ UPDATED 09/07/11
NHTSA ODI #10408785
101,000 miles · May 23, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT WAS DRIVING APPROXIMATELY 60 MPH WHEN THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS UNABLE TO RESTART AND WAS TOWED TO THE CONTACTS HOME. THE VEHICLE WAS NOT INSPECTED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AND ADVISED THE CONTACT THAT THE VEHICLE WAS NOT IN…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT WAS DRIVING APPROXIMATELY 60 MPH WHEN THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS UNABLE TO RESTART AND WAS TOWED TO THE CONTACTS HOME. THE VEHICLE WAS NOT INSPECTED OR REPAIRED. THE MANUFACTURER WAS CONTACTED AND ADVISED THE CONTACT THAT THE VEHICLE WAS NOT INCLUDED IN ANY RECALL. THE FAILURE AND CURRENT MILEAGES WERE APPROXIMATELY 101,000.
NHTSA ODI #10402387
60,380 miles · Apr 15, 2011
Engine And Engine Cooling
2001 GMC SIERRA - 8.1 ENGINE. ENGINE SHUTTING OFF WHILE DRIVING AND/OR FAILURE TO RESTART AFTER SHUT DOWN. THERE WAS AN NHTSA CASE FOR RECALLS, 07V521000, BUT MY VEHICLE WAS NOT PART OF THE RECALL CAMPAIGN 06083 BY GM FOR A DEFECTIVE CRANKSHAFT POSITION SENSOR. GM WOULD NOT INCLUDE MY VEHICLE IN THE RECALL IN SPITE OF IT BEING…
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2001 GMC SIERRA - 8.1 ENGINE. ENGINE SHUTTING OFF WHILE DRIVING AND/OR FAILURE TO RESTART AFTER SHUT DOWN. THERE WAS AN NHTSA CASE FOR RECALLS, 07V521000, BUT MY VEHICLE WAS NOT PART OF THE RECALL CAMPAIGN 06083 BY GM FOR A DEFECTIVE CRANKSHAFT POSITION SENSOR. GM WOULD NOT INCLUDE MY VEHICLE IN THE RECALL IN SPITE OF IT BEING AN IDENTICAL FAILURE. I BELIEVE THERE ARE MORE VEHICLES WITH DEFECTIVE SENSORS THAT WERE NOT INCLUDED IN THE ORIGINAL RECALL. IT COST OVER $700 TO REPAIR WHAT I BELIEVE IS A BIG SAFETY PROBLEM. I WAS LUCKY TO NOT GET IN AN ACCIDENT AFTER MY ENGINE SHUT OFF WHILE DRIVING ON THE HIGHWAY. THE SHUT DOWN RESULTED IN A LOSS OF POWER STEERING AND POWER BRAKES SO IT WAS DIFFICULT TO COAST TO A SAFE LOCATION ON THE HIGHWAY. *TR
NHTSA ODI #10396001
63,471 miles · Feb 20, 2011
Engine And Engine Cooling
ENGINE DIED WHILE DRIVING ON THE FREEWAY. *TR
NHTSA ODI #10383403
52,000 miles · Dec 8, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT FOR THE PAST YEAR THE VEHICLE HAD STALLED INTERMITTENTLY. THERE WERE NO PRIOR WARNINGS PRIOR TO THE STALLING, BUT THE MESSAGE CENTER AND BATTERY LIGHT WOULD ILLUMINATE AFTER THE FAILURE OCCURRED. THE DEALER PERFORMED A DIAGNOSTIC TEST, BUT WAS UNABLE TO DETEC…
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TL*THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT FOR THE PAST YEAR THE VEHICLE HAD STALLED INTERMITTENTLY. THERE WERE NO PRIOR WARNINGS PRIOR TO THE STALLING, BUT THE MESSAGE CENTER AND BATTERY LIGHT WOULD ILLUMINATE AFTER THE FAILURE OCCURRED. THE DEALER PERFORMED A DIAGNOSTIC TEST, BUT WAS UNABLE TO DETECT ANY FAILURE CODES. THE CONTACT TRIED REPLACING THE FUEL PUMP AND RELAYS, BUT THAT DID NOT CORRECT THE FAILURE. THE CONTACT THEN BECAME AWARE OF A RECALL FOR THE CRANKSHAFT POSITION SENSOR UNDER RECALL CAMPAIGN NUMBER 07V521000, ENGINE AND ENGINE COOLING. THE MANUFACTURER CONFIRMED THAT ALTHOUGH THE VEHICLE WAS EXPERIENCING THE SAME FAILURE, IT WAS NOT INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS 52000 AND THE CURRENT MILEAGE WAS 58300. UPDATED 02/07/11 *BF UPDATED 04/20/11
NHTSA ODI #10369675
90,300 miles · Sep 13, 2010
Engine And Engine CoolingPower Train
I HAVE OWNED MY 2001 GMC SIERRA 2500HD TRUCK SINCE IT WAS NEW. THE VEHICLE CURRENTLY HAS APPROXIMATELY 92000 MILES ON IT. WITH THE BRAKE LINE PROBLEM I RECENTLY HAD I FIGURED I SHOULD REPORT THE OTHER ISSUES THAT I DON?T THINK I SHOULD BE HAVING WITH A VEHICLE THAT IS LESS THAN 10 YEARS OLD. THE OIL COOLER LINES AND THE TRANS…
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I HAVE OWNED MY 2001 GMC SIERRA 2500HD TRUCK SINCE IT WAS NEW. THE VEHICLE CURRENTLY HAS APPROXIMATELY 92000 MILES ON IT. WITH THE BRAKE LINE PROBLEM I RECENTLY HAD I FIGURED I SHOULD REPORT THE OTHER ISSUES THAT I DON?T THINK I SHOULD BE HAVING WITH A VEHICLE THAT IS LESS THAN 10 YEARS OLD. THE OIL COOLER LINES AND THE TRANSMISSION COOLER LINES HAVE ALL RUSTED THROUGH AND HAVE HAD TO BE REPLACED. ALONG WITH THE LINES, THE CONNECTORS FOR THE LINES HAVE ALL HAD TO BE REPLACED DUE TO CATASTROPHIC FAILURE (THEY RUSTED SO BAD THAT WERE FALLING APART). IF THE VEHICLE WAS 20 YEARS OLD I MIGHT EXPECT THIS PROBLEM, BUT NOT ON ONE LESS THAN 10 YEARS OLD AND THE MILEAGE THAT IT HAS. *TR
NHTSA ODI #10355178
Mileage unknown · Sep 13, 2010
Engine And Engine Cooling
I HAVE OWNED MY 2001 GMC SIERRA 2500HD TRUCK SINCE IT WAS NEW. THE VEHICLE CURRENTLY HAS APPROXIMATELY 92,000 MILES ON IT. DURING THE TIME I HAVE OWNED IT, IT HAS HAD A PROBLEM WITH THE EXHAUST MANIFOLDS COMING LOOSE, DUE TO LOOSING STUDS, BROKEN STUDS OR THE STUDS JUST FALLING OUT. THE TWO DEALERSHIPS HAVE REPAIRED THIS PROB…
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I HAVE OWNED MY 2001 GMC SIERRA 2500HD TRUCK SINCE IT WAS NEW. THE VEHICLE CURRENTLY HAS APPROXIMATELY 92,000 MILES ON IT. DURING THE TIME I HAVE OWNED IT, IT HAS HAD A PROBLEM WITH THE EXHAUST MANIFOLDS COMING LOOSE, DUE TO LOOSING STUDS, BROKEN STUDS OR THE STUDS JUST FALLING OUT. THE TWO DEALERSHIPS HAVE REPAIRED THIS PROBLEM FOUR OR FIVE TIMES WHILE UNDER WARRANTY AND THE PROBLEM HAS OCCURRED AGAIN. I HAVE NEVER SEEN THIS KIND OF PROBLEM ON ANY OTHER VEHICLE THAT I HAVE OWNED AND I HAVE OWNED MANY VEHICLES. THE DANGER THAT THIS PROBLEM CREATES IS THE POSSIBILITY OF FIRE AND CARBON MONOXIDE IN THE CAB OF THE TRUCK. GM/THE DEALERSHIPS REFUSE TO ADDRESS THIS ISSUE, SO I AM FORCED TO TURN IT OVER TO YOU. *TR
NHTSA ODI #10355168
NHTSA investigations
2EA06016 · 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.
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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