NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter122,000 miles · Aug 15, 2006
Engine And Engine Cooling
MOTOR COMPLETELY SHUT OFF AT 70 MPH, LOST POWER STEERING AND POWER BRAKING. MOTOR WOULD NOT START IN NEUTRAL. HAD TO CROSS THROUGH TRAFFIC TO THE SHOULDER AND STOP BEFORE MOTOR WOULD START AGAIN. HAPPENED 4 TIMES IN 3 DAYS. BROUGHT VEHICLE TO DEALER AND DEALER TOLD ME IT WAS THE CRANK SENSOR, THEY HAVE HAD TO DO IT BEFORE. *…
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MOTOR COMPLETELY SHUT OFF AT 70 MPH, LOST POWER STEERING AND POWER BRAKING. MOTOR WOULD NOT START IN NEUTRAL. HAD TO CROSS THROUGH TRAFFIC TO THE SHOULDER AND STOP BEFORE MOTOR WOULD START AGAIN. HAPPENED 4 TIMES IN 3 DAYS. BROUGHT VEHICLE TO DEALER AND DEALER TOLD ME IT WAS THE CRANK SENSOR, THEY HAVE HAD TO DO IT BEFORE. *NM
NHTSA ODI #10165535
75,000 miles · Apr 25, 2006
Electrical SystemEngine And Engine CoolingEquipment
DT*: THE CONTACT STATED WHILE APPROACHING A STOP, DRIVING 5 MPH AND APPLYING THE BRAKES, THE ANTI- LOCK BRAKE SYSTEM ACTIVATED. THIS CAUSED AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO A DEALER. UPON INSPECTION THE SPEED SENSOR HUB WAS CORRODED DUE TO ROAD SALT AND WAS REPLACED. THERE IS A NHTSA RECALL, # 05V3790…
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DT*: THE CONTACT STATED WHILE APPROACHING A STOP, DRIVING 5 MPH AND APPLYING THE BRAKES, THE ANTI- LOCK BRAKE SYSTEM ACTIVATED. THIS CAUSED AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO A DEALER. UPON INSPECTION THE SPEED SENSOR HUB WAS CORRODED DUE TO ROAD SALT AND WAS REPLACED. THERE IS A NHTSA RECALL, # 05V379000, REGARDING THE SERVICE BRAKES, ANTI-LOCK. THE CONSUMERS VEHICLE IDENTIFICATION NUMBER WAS NOT INCLUDED IN THE RECALL. THE ALTERNATOR FAILED. THE ROTORS AND BRAKES HAD TO BE REPLACED DUE TO THE ROTORS RUSTING FROM THE INSIDE. THE ROTORS COULD NOT BE TURNED BECAUSE THEY WERE HEAVILY RUSTED. THE LEFT POWER WINDOW FAILED, THE MANUFACTURER USED A STEEL CABLE FOR THE ASSEMBLY, WHICH ALLOWED WATER TO SEEP IN WHICH CAUSED CORROSION. THE LEFT REAR OUTSIDE AXLE WAS LEAKING. THE A/C IDLER PULLEY AND TENSIONER WAS MAKING A LOUD NOISE. THE RIGHT POWER WINDOW FAILED. THE TIRES WERE CRACKING ALONG THE EDGES CLOSE TO THE RIM. GREASE LEAKED OUT FROM THE CV JOINT. THE REAR OIL SEAL WAS LEAKING. THE RIMS WERE DELAMINATING. THE CD WOULD NOT EJECT FROM THE PLAYER. THE IGNITION SWITCH WAS REPLACED, THE PASSENGER WINDSHIELD WIPER WAS LOOSE, THE MULTI-FUNCTION SWITCH WAS REPLACED. THE ACCELERATOR WOULD STICK SOMETIMES AND THE DRIVER SIDE MIRROR WAS BROKEN. UPDATED 07/10/06. *JB
NHTSA ODI #10156085
20,050 miles · Oct 18, 2004
Engine And Engine Cooling
WHILE DRIVING 55 MPH THE VEHICLE LOST POWER AND THE CHECK ENGINE SENSOR LIGHT ILLUMINATED. PLEASE PROVIDE ADDITIONAL INFORMATION. *JB
NHTSA ODI #10097011
Mileage unknown · Jan 27, 2004
Engine And Engine Cooling
WHEN THE TRUCK STARTS IT SOUNDS LIKE A DIESEL- FOR ABOUT 10 MIN MAX- THIS ONLY HAPPENS IN THE AM OR AFTER A LONG SIT AT WORK (IE.6+ HRS) WE WERE TOLD BY THE DEALER THAT ITS NORMAL AND THAT THERE IS A TECH BULLETIN ON IT- MY FATHER IN LAWS TRUCK (1500) DOESN'T MAKE THIS NOISE AND IT IS THE SAME YEAR AS MINE. ALSO THE NEW TRUCKS …
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WHEN THE TRUCK STARTS IT SOUNDS LIKE A DIESEL- FOR ABOUT 10 MIN MAX- THIS ONLY HAPPENS IN THE AM OR AFTER A LONG SIT AT WORK (IE.6+ HRS) WE WERE TOLD BY THE DEALER THAT ITS NORMAL AND THAT THERE IS A TECH BULLETIN ON IT- MY FATHER IN LAWS TRUCK (1500) DOESN'T MAKE THIS NOISE AND IT IS THE SAME YEAR AS MINE. ALSO THE NEW TRUCKS DO NOT MAKE THIS NOISE-- I DO THINK THAT SOMETHING IS GOING ON AND THAT THE DEALER OR MANUFACTURER DOESN'T WANT TO FIX IT SINCE ITS A SHAME- GOING TO LOSE MORE THAN ONE FAITHFUL CHEVY CONSUMER. *JB
NHTSA ODI #10055040
45,000 miles · Nov 24, 2003
Engine And Engine Cooling
WHILE DRIVING 35 MPH THE POWER STEERING AND BRAKES FAILED. THE VEHICLE WAS TOWED TO DEALERSHIP TO HAVE THE MECHANIC CHECK THE PROBLEMS. PLEASE PROVIDE ADDITIONAL INFORMATION. *JB
NHTSA ODI #10048584
30,000 miles · Oct 14, 2003
Engine And Engine Cooling
2001 CHEVROLET 2500HD. 8.1 LITER MOTOR, ALLISON TRANSMISSION. THE TRUCK HAS MULTIPLE PROBLEMS THAT THE DEALER IS REFUSING TO ACKNOWLEDGE AND FIX. *LA -HARD STARTING WHEN HOT. WHEN THE VEHICLE IS DRIVEN AND PARKED FOR 10 MINUTES, IT WILL NOT START. ENGINE TURNS OVER, BUT DOES NOT FIRE. AFTER AN ADDITIONAL 2-3 MINUTE WAIT, IT …
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2001 CHEVROLET 2500HD. 8.1 LITER MOTOR, ALLISON TRANSMISSION. THE TRUCK HAS MULTIPLE PROBLEMS THAT THE DEALER IS REFUSING TO ACKNOWLEDGE AND FIX. *LA -HARD STARTING WHEN HOT. WHEN THE VEHICLE IS DRIVEN AND PARKED FOR 10 MINUTES, IT WILL NOT START. ENGINE TURNS OVER, BUT DOES NOT FIRE. AFTER AN ADDITIONAL 2-3 MINUTE WAIT, IT WILL EVENTUALLY START. THIS HAPPENS ON A REGULAR BASIS. DEALER HAD THE TRUCK FOR 1 WEEK AND CLAIMS HE CAN NOT REPRODUCE THE PROBLEM. THEY SUGGESTED REPLACING PARTS WITH NO GARANTEE OF THE FIX. -EXHAUST FAILING. THE EXHAUST WAS REPLACED UNDER WARRANTY DUE TO LOOSE BAFFLES. IT IS FAILING AGAIN WITH THE SAME PROBLEM. DEALER AGAIN CLAIMS THE NOISE IS NORMAL. -EXCESSIVE OIL CONSUMPTION. I HAD IT IN FOR THIS PROBLEM. THE DEALER CHANGED THE OIL AND HAD ME COME IN EVERY 500 MILES TO CHECK THE OIL LEVEL. IT USED 1 1/2 QUARTS IN 3,000 MILES. THIS IS NORMAL TO USE THIS MUCH OIL. HOW EVER I TOW A TRAILER AND PLOW SNOW WITH THIS VEHICLE. DURING THESE TIMES OF TOWING AND PLOWING, THE TRUCK USES 3-4 QUARTS OF OIL IN 3,000 MILES. THERE ARE NO OBVIOUS LEAKS. THE DEALER AGAIN CLAIMS THERE IS NO PROBLEM. THIS VEHICLE WAS PURCHASED WITH THE LARGE MOTOR AND HEAVY DUTY TRANSMISSION SPECIFICALLY FOR THE TYPE OF WORK I EXPECT IT TO DO.
NHTSA ODI #10041770
50,340 miles · Oct 9, 2003
Engine And Engine Cooling
THE TRUCK KEPT DYING SO I TOOK IT IN TO A DEALERSHIP. HE REPLACED THE BATTERY AND TWO DAYS LATER IT WAS DYING AGAIN. THEY STILL HAVEN'T FIGURED OUT WHAT THE PROBLEM IS. *LA
NHTSA ODI #10041541
26,120 miles · Oct 2, 2003
Engine And Engine Cooling
ENGINE KNOCKS ON STARTUP AND WHEN WARM, WHICH SOUNDS LIKE THAT OF THE LIFTER. CONSUMER WENT TO THE DEALER AND WAS TOLD THAT THIS IS NORMAL. IT'S HARD TO THINK THAT GM WOULD MAKE A GAS ENGINE TO MAKE THIS KIND OF NOISE. THE NEW 6.0 DON'T MAKE THIS TYPE OF NOISE ON START UP. I FOUND OUT FROM THE DEALER THAT THE OLDER 6.0 HAVE …
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ENGINE KNOCKS ON STARTUP AND WHEN WARM, WHICH SOUNDS LIKE THAT OF THE LIFTER. CONSUMER WENT TO THE DEALER AND WAS TOLD THAT THIS IS NORMAL. IT'S HARD TO THINK THAT GM WOULD MAKE A GAS ENGINE TO MAKE THIS KIND OF NOISE. THE NEW 6.0 DON'T MAKE THIS TYPE OF NOISE ON START UP. I FOUND OUT FROM THE DEALER THAT THE OLDER 6.0 HAVE MADE THIS KIND OF NOISE. GM PULLED THE ENGINES FOR INSPECTION. IT SEEMS LIKE THEY FOUND THE PROBLEM AND FIXED IT ON THE NEW MODELS AND WON'T FIX THE MISTAKE OF THE OLD ONES. *LA
NHTSA ODI #10041136
39,000 miles · Aug 19, 2003
Engine And Engine Cooling
TURCK ENGINE HAS A KNOCK THAT I WAS TOLD BY THE DEALER AND GM THAT IT WAS SIMPLY A COLD START KNOCK. HOWEVER, I WAS TOLD BY A PERSONAL FRIEND AT THE GM TECH CENTER THAT IT IS REALLY A PISTON SLAP, AND IS A RESULT OF THE PISTONS BEING TOO SMALL FOR THE BORE WHICH COULD LEAD TO ENGINE SEIZURE/FAILURE, AND THAT GM IS AWARE OF IT! …
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TURCK ENGINE HAS A KNOCK THAT I WAS TOLD BY THE DEALER AND GM THAT IT WAS SIMPLY A COLD START KNOCK. HOWEVER, I WAS TOLD BY A PERSONAL FRIEND AT THE GM TECH CENTER THAT IT IS REALLY A PISTON SLAP, AND IS A RESULT OF THE PISTONS BEING TOO SMALL FOR THE BORE WHICH COULD LEAD TO ENGINE SEIZURE/FAILURE, AND THAT GM IS AWARE OF IT! THE TRUCK KNOCKS EVEN WHEN ENGINE IS WARM. I HAVE BEGGED FOR A REPAIR UNDER THE TRUCKS WARRANTY BUT HAVE BEEN DENIED. I AM CONCERNED THAT AT SOME POINT THE ENGINE COULD SEIZE AND CAUSE A SERIOUS ACCIDENT AND HARM TO MYSELF AND OTHERS. GM SEEMS TO THINK IF THEY PRETEND IT IS A DIFFERENT PROBLEM, AND IF THEY CROSS THEIR FINGERS THEY WILL SAVE MONEY AND AVOID A RECALL. THE DEALER INDICATED TO ME THAT THEY KNOW WHAT THE PROBLEM IS AND SO DOES GM BUT THERE IS NOTHING THEY CAN DO FOR ME. AT ONE POINT GM WAS OFFERING TO EXTEND MY WARRANTY BUT RENIGD BECAUSE I WAS THE SECOND OWNER, EVEN THOUGH I PAID FOR THEIR EXTENDED WARRANTY. PLEASE INVESTIGATE BEFORE SOMEONE OWNING ONE OF THESE TRUCKS DOES HAVE THE ENGINE SIEZE AND INNOCENT PEOPLE ARE HURT! INCIDENT DATE IS APPROXIMATE AS I HAVE TAKEN THE TRUCK TO THE DEALER MANY TIMES ON MANY DATES IN HOPES OF GETTING THIS PROBLEM FIXED BECAUSE THEY WANT ME TO GO AWAY. *AK
NHTSA ODI #10033144
10,000 miles · May 4, 2003
Engine And Engine Cooling
ENGINE USES OIL AND KNOCKS. *JB
NHTSA ODI #10016986
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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