NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports80,000 miles · Sep 3, 2008
Electrical System
I HAVE A 2001 2500 HD CHEVROLET WITH THE 8.1 LITER ENGINE. THE VEHICLE WILL STALL IN TRAFFIC AND WILL NOT START AGAIN. THE TRUCK WILL RUN ROUGH SOMETIMES WILL START AFTER A COOL DOWN PERIOD. THIS IS A VERY DANGEROUS SITUATION WITH IT STALLING IN TRAFFIC. THIS IS THE CRANKSHAFT SENSOR WHICH IS COVERED FOR SAME PICKUP WITH SAM…
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I HAVE A 2001 2500 HD CHEVROLET WITH THE 8.1 LITER ENGINE. THE VEHICLE WILL STALL IN TRAFFIC AND WILL NOT START AGAIN. THE TRUCK WILL RUN ROUGH SOMETIMES WILL START AFTER A COOL DOWN PERIOD. THIS IS A VERY DANGEROUS SITUATION WITH IT STALLING IN TRAFFIC. THIS IS THE CRANKSHAFT SENSOR WHICH IS COVERED FOR SAME PICKUP WITH SAME ENGINE OUT OF A DIFFERENT PLANT. THEY SAY EVEN THOUGH IT IS THE SAME FAULTY PART MY PICKUP IS NOT COVERED BECAUSE IT IS FROM A DIFFERENT PLANT. THIS ALMOST CAUSED A ACCIDENT WHILE I WAS DRIVING AS IT STALLED AS I WAS MAKING A TURN. *TR
NHTSA ODI #10240799
Mileage unknown · Sep 2, 2008
Engine And Engine Cooling
I HAVE A 2001 CHEVROLET 2500HD 8.1L WITH 120K MILES. TRUCK RUNS GREAT BUT MY ENGINE WILL JUST SHUT OFF. WHILE DRIVING AT ANY SPEED THE ENGINE WILL SHUT OFF THEN KICK ON AGAIN ALL BY ITSELF. WHEN STOPPED AT A LIGHT IT WILL SHUT OFF AND WILL NOT COME BACK ON UNLESS I TURN THE KEY TO START IT AGAIN. ENGINE IS THE ONLY THING THAT DI…
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I HAVE A 2001 CHEVROLET 2500HD 8.1L WITH 120K MILES. TRUCK RUNS GREAT BUT MY ENGINE WILL JUST SHUT OFF. WHILE DRIVING AT ANY SPEED THE ENGINE WILL SHUT OFF THEN KICK ON AGAIN ALL BY ITSELF. WHEN STOPPED AT A LIGHT IT WILL SHUT OFF AND WILL NOT COME BACK ON UNLESS I TURN THE KEY TO START IT AGAIN. ENGINE IS THE ONLY THING THAT DIES, STEREO, HEADLIGHTS, ETC ALL REMAIN ON AND I DON'T GET ANY SERVICE LIGHTS OR MESSAGES ON THE DASH WHEN IT HAPPENS. SOMETIMES IF IT FEELS AS IF IT IS GOING TO DIE ON ME I CAN STEP ON THE GAS PEDAL TO PREVENT IT FROM DYING. *TR
NHTSA ODI #10240661
58,000 miles · Sep 2, 2008
Electrical System
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE PASSING TWO TRACTOR TRAILERS AT 55 MPH, THE VEHICLE SHUT OFF. THE CONTACT WAS ABLE TO SLOW THE VEHICLE DOWN AND MANEUVER TO THE SHOULDER. HE WAITED UNTIL THE VEHICLE RESTARTED. THE DEALER STATED THAT THE IGNITION SENSOR WAS FAULTY AND A HOLE WOULD NEED TO BE CUT I…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE PASSING TWO TRACTOR TRAILERS AT 55 MPH, THE VEHICLE SHUT OFF. THE CONTACT WAS ABLE TO SLOW THE VEHICLE DOWN AND MANEUVER TO THE SHOULDER. HE WAITED UNTIL THE VEHICLE RESTARTED. THE DEALER STATED THAT THE IGNITION SENSOR WAS FAULTY AND A HOLE WOULD NEED TO BE CUT IN THE FLOORBOARD TO MAKE THE NECESSARY REPAIRS. THE CONTACT REFUSED TO SUSTAIN MORE DAMAGE TO THE VEHICLE. THE FAILURE MILEAGE WAS 58,000 AND CURRENT MILEAGE WAS 70,000.
NHTSA ODI #10240610
95,000 miles · Aug 18, 2008
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING AT ANY SPEED, THE VEHICLE SHUTS OFF AND HAS TO BE COOLED IN ORDER TO RESTART. THE FAILURE HAS OCCURRED APPROXIMATELY TWELVE TIMES WHILE DRIVING. THE VEHICLE WAS TAKEN TO A DEALER ONCE, BUT THERE WAS NO ERROR CODE. THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING AT ANY SPEED, THE VEHICLE SHUTS OFF AND HAS TO BE COOLED IN ORDER TO RESTART. THE FAILURE HAS OCCURRED APPROXIMATELY TWELVE TIMES WHILE DRIVING. THE VEHICLE WAS TAKEN TO A DEALER ONCE, BUT THERE WAS NO ERROR CODE. THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). THE CURRENT MILEAGE WAS 98,000 AND FAILURE MILEAGE WAS 95,000.
NHTSA ODI #10238649
36,000 miles · Aug 6, 2008
Engine And Engine Cooling
2001 CHEVROLET SILVERADO 8.1 LITER ENGINE WILL INTERMITTENTLY STALL IN TRAFFIC. SERVICE ENGINE LIGHT IS ON AND DEALER DIAGNOSTICS SAY IT IS A FAULTY CRANKSHAFT POSITION SENSOR. THERE IS ALREADY A RECALL OUT FOR THIS (GM RECALL 06083) OR NHTSA CAMPAIGN ID # 07V521000, HOWEVER, THE DEALERSHIP SAYS THAT MY VIN # IS NOT COVERED. …
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2001 CHEVROLET SILVERADO 8.1 LITER ENGINE WILL INTERMITTENTLY STALL IN TRAFFIC. SERVICE ENGINE LIGHT IS ON AND DEALER DIAGNOSTICS SAY IT IS A FAULTY CRANKSHAFT POSITION SENSOR. THERE IS ALREADY A RECALL OUT FOR THIS (GM RECALL 06083) OR NHTSA CAMPAIGN ID # 07V521000, HOWEVER, THE DEALERSHIP SAYS THAT MY VIN # IS NOT COVERED. MY VEHICLE IS EXHIBITING THE IDENTICAL PROBLEMS OUTLINED IN THE RECALL, SO THE PROBLEM IS OBVIOUSLY LARGER THAN THE FEW VIN'S THAT THEY ARE COVERING. *TR
NHTSA ODI #10237255
Mileage unknown · Jul 23, 2008
Power Train
2001 CHEVROLET 2500HD 4X4 SILVERADO STALLING WHILE DRIVING AND TURNING CAUSING LOSS OF STEERING AND BRAKING. PLEASE SEE NHTSA ID 07V521000. I AM TOLD THAT THIS PROBLEM IS OCCURRING IN MANY 6.0 TRUCKS AND A RECALL ONLY COVERS A SMALL PORTION. VERY DANGEROUS FOR A POPULAR WORK SERIES TRUCK. *TR
NHTSA ODI #10235425
119,000 miles · Jun 16, 2008
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT EXPERIENCED INTERMITTENT LOSSES OF POWER WITH HIS VEHICLE. THE FAILURE OCCURRED NUMEROUS TIMES WHILE DRIVING AT BOTH LOW AND HIGH SPEEDS, BUT WAS ORIGINALLY NOTICED AT 60 MPH. THERE WERE NO WARNING INDICATORS PRIOR TO THE VEHICLE LOSING POWER. OCCASIONALLY, …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT EXPERIENCED INTERMITTENT LOSSES OF POWER WITH HIS VEHICLE. THE FAILURE OCCURRED NUMEROUS TIMES WHILE DRIVING AT BOTH LOW AND HIGH SPEEDS, BUT WAS ORIGINALLY NOTICED AT 60 MPH. THERE WERE NO WARNING INDICATORS PRIOR TO THE VEHICLE LOSING POWER. OCCASIONALLY, THE VEHICLE WOULD SHUT DOWN AND IMMEDIATELY RESTART, BUT OTHER TIMES, IT WOULD TAKE LONGER TO DO SO. THE DEALER STATED THAT THE VIN WAS NOT INCLUDED IN THE RECALL PERTAINING TO THIS FAILURE. THE CONTACT CALLED THE MANUFACTURER'S CUSTOMER SERVICE LINE AND WAS INFORMED THAT THERE WAS NO RECALL FOR THIS FAILURE; HOWEVER, HE WAS ALSO INFORMED THAT HIS VIN WAS NOT INCLUDED IN THE RECALL BECAUSE HIS CHECK ENGINE WARNING LIGHT DID NOT ILLUMINATE PRIOR TO THE FAILURE. THE RECALL NUMBER WAS UNKNOWN. THE CURRENT MILEAGE WAS 121,000 AND FAILURE MILEAGE WAS APPROXIMATELY 119,000. UPDATED 7/3/08 *CN
NHTSA ODI #10231208
121,000 miles · Jun 16, 2008
Engine And Engine Cooling
OVER THE PAST FEW MONTHS I HAVE BEEN EXPERIENCING MY TRUCK COMPLETELY SHUTTING DOWN REGARDLESS OF HOW FAST OR SLOW I'D BE DRIVING. HAVING TO DRIVE IN BUSY RUSH HOUR TRAFFIC AND THROUGH CONSTRUCTION ZONES, IT'S MY OPINION THAT THIS IS AN EXTREME SAFETY CONCERN, NOT ONLY FOR MYSELF BUT OTHERS. MY TRUCK IS AT A MECHANIC'S SHOP AN…
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OVER THE PAST FEW MONTHS I HAVE BEEN EXPERIENCING MY TRUCK COMPLETELY SHUTTING DOWN REGARDLESS OF HOW FAST OR SLOW I'D BE DRIVING. HAVING TO DRIVE IN BUSY RUSH HOUR TRAFFIC AND THROUGH CONSTRUCTION ZONES, IT'S MY OPINION THAT THIS IS AN EXTREME SAFETY CONCERN, NOT ONLY FOR MYSELF BUT OTHERS. MY TRUCK IS AT A MECHANIC'S SHOP AND THE MECHANIC TOLD ME THAT THERE'S A CODE IN THE COMPUTER MODULE THAT INDICATES A "CRANKSHAFT POSITIONING SENSOR AND ENGINE STALL" AND THAT GENERAL MOTORS HAS A RECALL RELATING TO THIS. WHEN I CALLED A LOCAL DEALERSHIP, CONNELL CHEVROLET IN COPPERAS COVE, TEXAS THEY TOLD ME THAT MY VEHICLE WASN'T INCLUDED IN THE RECALL "BECAUSE I COULDN'T HONESTLY TELL THEM THAT THE 'SERVICE ENGINE SOON LIGHT' HAD CAME ON; AND THAT MY TRUCK WASN'T RUNNING POORLY (OR A WORD TO THAT AFFECT). I ALSO CONTACTED GENERAL MOTORS AND THEY BASICALLY TOLD ME THE SAME THING. I AM HAVING MY TRUCK REPAIRED AS I PREPARE THIS COMPLAINT AND I HONESTLY AND SINCERELY HOPE THAT GENERAL MOTORS INCLUDES THE SYMPTOMS I'VE EXPERIENCED AND EXPAND THE RECALL, AND THAT ANYONE WHO HAD WORK DONE BY A MECHANIC OTHER THAN AT A DEALERSHIP BE REIMBURSED FOR THE REPAIRS. THIS PROBLEM HAS EXISTED INTERMITTENTLY OVER THE PAST FEW MONTHS, AS MENTIONED ABOVE. THE LAST INCIDENT DATE IS INDICATED BELOW: *TR
NHTSA ODI #10231138
62,500 miles · May 18, 2008
Engine And Engine Cooling
MY 2001 CHEVROLET SILVERADO STALLS WHILE DRIVING. THERE IS NO WARNING WHEN THIS HAPPENS. I MUST BRING THE TRUCK TO A HALT AND TRY TO RESTART. SOMETIMES IT TAKES TWO OR THREE TRIES BEFORE IT STARTS. IT SEEMS TO HAPPEN IN WARM WEATHER. *TR
NHTSA ODI #10228113
78,500 miles · Mar 20, 2008
Electrical System
INSTRUMENT CLUSTER INOPERATIVE. VOLTS GAUGE WOULD READ LOW. I HAD IT CHECKED OUT AND THE BATTERY WAS PROVIDING THE PROPER 13.8 VOLTS. *TR
NHTSA ODI #10221865
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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