NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter88,000 miles · Sep 23, 2008
Engine And Engine Cooling
BEGAN HAVING PROBLEMS WITH STARTING THE VEHICLE ON OCCASION. THAT LEAD TO LOSING COMPLETE POWER WHILE AT HIGHWAY SPEEDS (65 MPH) AS WELL AS LOSING COMPLETE POWER WHILE AT IDLE OR SLOW SPEEDS. THE LAST TIME IT HAPPENED THE CHECK ENGINE LIGHT CAME ON. IT SHOWED A CODE THAT INDICATED THE CRANKSHAFT SENSOR WAS AT FAULT. TRUCK WA…
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BEGAN HAVING PROBLEMS WITH STARTING THE VEHICLE ON OCCASION. THAT LEAD TO LOSING COMPLETE POWER WHILE AT HIGHWAY SPEEDS (65 MPH) AS WELL AS LOSING COMPLETE POWER WHILE AT IDLE OR SLOW SPEEDS. THE LAST TIME IT HAPPENED THE CHECK ENGINE LIGHT CAME ON. IT SHOWED A CODE THAT INDICATED THE CRANKSHAFT SENSOR WAS AT FAULT. TRUCK WAS TAKEN TO DEALERSHIP AND THIS WAS CONFIRMED, HOWEVER THE DEALER INFORMED ME THAT THE RECALL (07V521000) DID NOT APPLY TO MY VIN EVEN THOUGH IT WAS A 2001 WITH AN 8.1 L. I PAID TO HAVE IT FIXED AT A COST OF $375. *TR
NHTSA ODI #10243179
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
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
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
50,000 miles · Jan 23, 2008
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE STALLED OVER A DOZEN TIMES. THE FAILURE WAS NOTICED WHILE DRIVING 70 MPH. THE CHECK ENGINE LIGHT ILLUMINATED PRIOR TO THE FAILURE. OCCASIONALLY, THE VEHICLE WOULD JUST JERK AND OTHER TIMES IT WOULD COMPLETELY SHUT DOWN. THE CONTACT H…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE STALLED OVER A DOZEN TIMES. THE FAILURE WAS NOTICED WHILE DRIVING 70 MPH. THE CHECK ENGINE LIGHT ILLUMINATED PRIOR TO THE FAILURE. OCCASIONALLY, THE VEHICLE WOULD JUST JERK AND OTHER TIMES IT WOULD COMPLETELY SHUT DOWN. THE CONTACT HAD TO WAIT APPROXIMATELY 5-10 MINUTES BEFORE THE VEHICLE WOULD RESTART. THE DEALER STATED THAT HIS VIN WAS EXCLUDED FROM THE CRANKSHAFT RECALL. THE PURCHASE DATE AND RECALL NUMBER WERE UNKNOWN. THE CURRENT MILEAGE WAS 73,000 AND FAILURE MILEAGE WAS APPROXIMATELY 50,000. UPDATED 02-19-08 *BF THE CONSUMER STATED THE PROBLEM STARTED AT 50,000 MILES AND THROUGH TO 73,000 CURRENTLY. UPDATED 02/14/08 *TR
NHTSA ODI #10215776
37,541 miles · Jan 18, 2008
Engine And Engine Cooling
MY 2001 CHEVROLET SILVERADO HD2500 P/U STARTED HAVING INTERMITTENT STALLING PROBLEMS IN JULY 2007. THE ENGINE WOULD DIE AND IT WOULD TAKE A FEW MINUTES TO RESTART. FINALLY IN SEPT 2007 IT DIED ON THE FREEWAY WHEN I WAS TRAVELING AT OVER 65 MPH. THE POWERSTEERING STOPPED AND THE POWER BRAKE ASSIST STOPPED. I WAS LUCKY THAT I D…
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MY 2001 CHEVROLET SILVERADO HD2500 P/U STARTED HAVING INTERMITTENT STALLING PROBLEMS IN JULY 2007. THE ENGINE WOULD DIE AND IT WOULD TAKE A FEW MINUTES TO RESTART. FINALLY IN SEPT 2007 IT DIED ON THE FREEWAY WHEN I WAS TRAVELING AT OVER 65 MPH. THE POWERSTEERING STOPPED AND THE POWER BRAKE ASSIST STOPPED. I WAS LUCKY THAT I DIDN'T HAVE A HIGH SPEED ACCIDENT. THE TRUCK WAS TAKEN TO THE LOCAL CHEVROLET DEALER AND THEY REPLACED THE CRANKSHAFT POSITION SENSOR AND CHARGED ME $420.99. THE VEHICLE ONLY HAD 37,546 MILES ON IT AT THE TIME BUT WAS OUT OF WARRANTY. I HAVE NOT HAD ANY FURTHER PROBLEMS SINCE THE REPAIR. I CONTACTED CHEVROLET ABOUT THEIR RECALL # 06083 NHTSA ID#07V521000 AND THEY ADVISED THAT MY VEHICLE DID NOT QUALIFY. I DON'T UNDERSTAND WHY SINCE IT IS THE SAME 8.1 ENGINE AND YEAR/MODEL. IF YOU GO ON THE GM-TRUCK.COM WEB SITE YOU WILL SEE THAT THIS IS AVERY COMMON AND DANGEROUS PROBLEM WITH THE 2001 8.1 GM ENGINES. *TR
NHTSA ODI #10215380
70,000 miles · Dec 28, 2007
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE FAILED TO START. WHILE DRIVING APPROXIMATELY 50 MPH, THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL AND THEN THE VEHICLE STALLED. THE VEHICLE IMMEDIATELY RESTARTED AUTOMATICALLY. A LOCAL MECHANIC STATED THAT THE CRANK S…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE FAILED TO START. WHILE DRIVING APPROXIMATELY 50 MPH, THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL AND THEN THE VEHICLE STALLED. THE VEHICLE IMMEDIATELY RESTARTED AUTOMATICALLY. A LOCAL MECHANIC STATED THAT THE CRANK SHAFT SENSOR CAUSED THE FAILURE. THE VEHICLE WAS REPAIRED AND THERE HAD BEEN NO FURTHER OCCURRENCES. THE DEALER STATED THAT HIS VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). HE FILED A FORMAL COMPLAINT WITH THE MANUFACTURER. THE CURRENT AND FAILURE MILEAGES WERE 70,000. UPDATED 02-14-08 *BF
NHTSA ODI #10213076
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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