NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter78,000 miles · Jul 29, 2013
Engine And Engine CoolingPower Train
TL* THE CONTACT OWNS A 2001 CHEVROLET 2500 HD. THE CONTACT STATED THAT WHILE DRIVING UPHILL AT 55 MPH, THE ENGINE STALLED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND INFORMED THAT THERE WERE NO RECALLS FOR THE VEHICLE. THE FAILURE MILEAGE WAS APPROXIMATELY 78,000 AND THE CURRENT VEHICLE MILEAGE WAS 88,000…
Read full complaint
TL* THE CONTACT OWNS A 2001 CHEVROLET 2500 HD. THE CONTACT STATED THAT WHILE DRIVING UPHILL AT 55 MPH, THE ENGINE STALLED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND INFORMED THAT THERE WERE NO RECALLS FOR THE VEHICLE. THE FAILURE MILEAGE WAS APPROXIMATELY 78,000 AND THE CURRENT VEHICLE MILEAGE WAS 88,000. UPDATED 08/27/13*LJ
NHTSA ODI #10532358
Mileage unknown · Dec 21, 2011
Electrical SystemEngine And Engine CoolingFuel System, Gasoline
MY VEHICLE WOULD STALL OUT ON ME AT ANY TIME FOR ABOUT 2 MONTHS IT DIDN'T MATTER WHAT SPEED I WAS DOING OR WHERE I WAS IT WOULD STALL OUT SO I WOULD HAVE TO COAST TO THE SIDE OF THE ROAD WITH NO POWER STEERING AND WAIT TO CRANK THE VEHICLE BACK UP. THEN DECEMBER 23 2008 I WAS ON MY WAY HOME AND IT COMPLETELY STOPPED I COULDN'T G…
Read full complaint
MY VEHICLE WOULD STALL OUT ON ME AT ANY TIME FOR ABOUT 2 MONTHS IT DIDN'T MATTER WHAT SPEED I WAS DOING OR WHERE I WAS IT WOULD STALL OUT SO I WOULD HAVE TO COAST TO THE SIDE OF THE ROAD WITH NO POWER STEERING AND WAIT TO CRANK THE VEHICLE BACK UP. THEN DECEMBER 23 2008 I WAS ON MY WAY HOME AND IT COMPLETELY STOPPED I COULDN'T GET IT TO CRANK BATTERY WAS COMPLETELY DEAD AND IT WAS AT NIGHT ON A HIGHWAY. I TOOK IT TO EVERY DEALER SHIP AND EVERY MECHANIC AND NOONE COULD TELL ME WHAT WAS WRONG WITH IT. FINALLY I LOOKED ONLINE AT RECALLS AND FOUND THAT THERE IS A RECALL FOR THE EXACT MAKE AND MODEL OF MY VEHICLE BUT WHEN I CALLED GMC THEY TOLD ME THAT THERE WAS NO RECALL FOR MY VEHICLE SO I WENT AND PAID OUT OF MY OWN POCKET TO FIX THIS PROBLEM. THIS IS A MAJOR PROBLEM THAT THEY HAVE FOUND BUT AREN'T DOING ANYTHING ABOUT IT FOR ME I MEAN IF THEY HAVE THE RECALL ALREADY FOR THE SAME VEHICLE THEN WHY ISN'T MY VEHICLE INCLUDED? *TR
NHTSA ODI #10440906
Mileage unknown · Sep 9, 2011
Engine And Engine Cooling
BROKEN EXHAUST MANIFOLD BOLTS. *TR
NHTSA ODI #10424487
94,000 miles · Aug 19, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 66 MPH THE VEHICLE SUDDENLY STALLED. THE FAILURE OCCURRED INTERMITTENTLY AT DIFFERENT SPEEDS. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC WAS UNABLE TO DETERMINE THE FAILURE. THE VEHICLE WAS NOT REPAIRED…
Read full complaint
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 66 MPH THE VEHICLE SUDDENLY STALLED. THE FAILURE OCCURRED INTERMITTENTLY AT DIFFERENT SPEEDS. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC WAS UNABLE TO DETERMINE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. NHTSA RECALL CAMPAIGN NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) MAY BE RELATED TO THE FAILURE. THE MANUFACTURER WAS CONTACTED AND STATED THE VIN WAS NOT INCLUDED IN THE RECALL. THE APPROXIMATE FAILURE MILEAGE WAS 94,000.
NHTSA ODI #10420745
112,000 miles · Aug 9, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, APPROACHING A TRAFFIC STOP SIGNAL, THE BRAKE PEDAL WAS ENGAGED AND THE ENGINE STALLED WITHOUT WARNING. THE ENGINE RESTARTED AFTER WAITING A FEW MOMENTS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND T…
Read full complaint
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, APPROACHING A TRAFFIC STOP SIGNAL, THE BRAKE PEDAL WAS ENGAGED AND THE ENGINE STALLED WITHOUT WARNING. THE ENGINE RESTARTED AFTER WAITING A FEW MOMENTS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND THEY RECOMMENDED THE CRANKSHAFT POSITION SENSOR BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THERE WAS A RECALL RELATED TO THE SIMILAR DEFECT FOR THE MODEL YEAR 2001 SILVERADO, WHICH WAS UNDER NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). THE CONTACT PLANNED TO TAKE THE VEHICLE TO AN AUTHORIZED DEALER. THE MANUFACTURER WAS MADE AWARE OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 112,000.
NHTSA ODI #10418147
80,000 miles · May 3, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT WAS DRIVING 50 MPH WHEN THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO COAST THE VEHICLE FROM THE ROADWAY AND RESTART. THE FAILURE WOULD RECUR SPORADICALLY AND OFTENTIMES, THE CONTACT WAS UNABLE TO IMMEDIATELY RESTART THE VEHICLE. THE FAILURE WAS INTERMIT…
Read full complaint
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT WAS DRIVING 50 MPH WHEN THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO COAST THE VEHICLE FROM THE ROADWAY AND RESTART. THE FAILURE WOULD RECUR SPORADICALLY AND OFTENTIMES, THE CONTACT WAS UNABLE TO IMMEDIATELY RESTART THE VEHICLE. THE FAILURE WAS INTERMITTENT AND BECAME MORE FREQUENT OVER TIME. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHO REPLACED THE CRANKSHAFT POSITION SENSOR. THE MANUFACTURER WAS NOT WILLING TO OFFER ANY ASSISTANCE. THE CURRENT MILEAGE WAS APPROXIMATELY 113,000 AND THE FAILURE MILEAGE WAS APPROXIMATELY 80,000.
NHTSA ODI #10398836
57,000 miles · Apr 6, 2011
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING 35 MPH, THE VEHICLE STALLED AS THE BATTERY WARNING LIGHT ILLUMINATED. THE VEHICLE WAS SHIFTED INTO NEUTRAL AND THE CONTACT WAS ABLE TO RESTART THE VEHICLE. THE CONTACT STATED THAT HE HAD EXPERIENCED THE FAILURE EIGHT TO TEN TIMES OVER A COURSE OF TWO MONTHS. T…
Read full complaint
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING 35 MPH, THE VEHICLE STALLED AS THE BATTERY WARNING LIGHT ILLUMINATED. THE VEHICLE WAS SHIFTED INTO NEUTRAL AND THE CONTACT WAS ABLE TO RESTART THE VEHICLE. THE CONTACT STATED THAT HE HAD EXPERIENCED THE FAILURE EIGHT TO TEN TIMES OVER A COURSE OF TWO MONTHS. THE VEHICLE WAS TAKEN TO THE DEALER FOR THE FAILURE. THE CONTACT STATED HE REFERENCED NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) AND WAS ADVISED BY THE DEALER AND THE MANUFACTURER THAT HIS VEHICLE WAS NOT INCLUDED IN THE RECALL. THE VEHICLE WAS NOT INSPECTED FOR THE FAILURE BY THE DEALER AND WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 57,000 AND THE CURRENT MILEAGE WAS 58,000. UPDATED 5/2/11 *CN UPDATED 05/13/11
NHTSA ODI #10394423
65,000 miles · Nov 18, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 45 MPH THE VEHICLE STALLED AND WOULD NOT RESTART. THE VEHICLE HAD TO COOL DOWN BEFORE IT WOULD RESTART AGAIN. THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT MECHANIC WHO INFORMED THE CONTACT THAT THE CRANK SHAFT HAD FAILED. T…
Read full complaint
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 45 MPH THE VEHICLE STALLED AND WOULD NOT RESTART. THE VEHICLE HAD TO COOL DOWN BEFORE IT WOULD RESTART AGAIN. THE VEHICLE WAS DIAGNOSED BY AN INDEPENDENT MECHANIC WHO INFORMED THE CONTACT THAT THE CRANK SHAFT HAD FAILED. THE VEHICLE WAS INSPECTED AND REPAIRED BY A DEALER WHO REPLACED THE CRANK SHAFT SENSOR. THE FAILURE MILEAGE WAS 65,000.
NHTSA ODI #10366711
Mileage unknown · Nov 12, 2010
Engine And Engine Cooling
2001 CHEVROLET SILVERADO. CONSUMER STATES VEHICLE STALLED AND POWER AND BRAKES BECAME INOPERABLE *TGW THE CONSUMER LEARNED A RECALL HAD BEEN ISSUED FOR THE EXACT PROBLEM HE EXPERIENCED REGARDING THE CRANKSHAFT POSITION SENSOR. HOWEVER, HE WAS DENIED REIMBURSEMENT BY GM WHO STATED HIS VEHICLE IDENTIFICATION NUMBER WAS NOT INCLUD…
Read full complaint
2001 CHEVROLET SILVERADO. CONSUMER STATES VEHICLE STALLED AND POWER AND BRAKES BECAME INOPERABLE *TGW THE CONSUMER LEARNED A RECALL HAD BEEN ISSUED FOR THE EXACT PROBLEM HE EXPERIENCED REGARDING THE CRANKSHAFT POSITION SENSOR. HOWEVER, HE WAS DENIED REIMBURSEMENT BY GM WHO STATED HIS VEHICLE IDENTIFICATION NUMBER WAS NOT INCLUDED IN THE RECALL. *JB
NHTSA ODI #10366056
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…
Read full complaint
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
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.
Illustration