NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports65,000 miles · Sep 18, 2006
Electrical SystemEngine And Engine Cooling
NHTSA ACTION NUMBER PE06016 2001 CHEVY 2500 HD 4X4 WITH 8.1 L; STALLING AT HIGHWAY SPEEDS, LOSS OF POWER STEERING AND BRAKES. BATTERY/SECURITY LIGHT COMES ON WHEN VEHICLE STALLS; VEHICLE MAY OR MAY NOT START FOR ABOUT 10-30 MIN AFTER STALL; CRANKING BUT NOT STARTING. ADDITIONAL, AFTER VEHICLE IS PARKED IT WILL CRANK BUT N…
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NHTSA ACTION NUMBER PE06016 2001 CHEVY 2500 HD 4X4 WITH 8.1 L; STALLING AT HIGHWAY SPEEDS, LOSS OF POWER STEERING AND BRAKES. BATTERY/SECURITY LIGHT COMES ON WHEN VEHICLE STALLS; VEHICLE MAY OR MAY NOT START FOR ABOUT 10-30 MIN AFTER STALL; CRANKING BUT NOT STARTING. ADDITIONAL, AFTER VEHICLE IS PARKED IT WILL CRANK BUT NOT START. REPLACED FUEL FILTER, CAP AND ROTOR, WIRES & PLUGS; HAD INJECTORS CLEANED AND THE PROBLEM HAS NOT BEEN FIXED. *NM
NHTSA ODI #10168486
75,872 miles · Sep 6, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE APPLYING BRAKE PRESSURE AT ANY SPEED, THE ANTILOCK BRAKES ACTIVATED WITHOUT WARNING AND THERE WAS AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS INSPECTED BY A DEALER WHO DETERMINED THE WHEEL SENSORS WERE INOPERATIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS EXPOSED TO EXCESSIVE ROAD SALTS DURI…
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DT*: THE CONTACT STATED WHILE APPLYING BRAKE PRESSURE AT ANY SPEED, THE ANTILOCK BRAKES ACTIVATED WITHOUT WARNING AND THERE WAS AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS INSPECTED BY A DEALER WHO DETERMINED THE WHEEL SENSORS WERE INOPERATIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS EXPOSED TO EXCESSIVE ROAD SALTS DURING THE WINTER MONTHS, BUT NO CORROSION WAS NOTED. THERE WAS A NHTSA RECALL, # 05V379000, REGARDING THE ANTILOCK BRAKES. THE VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN. THE MANUFACTURER WAS ALERTED. UPDATED 10/25/2006 - *NM
NHTSA ODI #10167503
62,000 miles · Sep 5, 2006
Electrical SystemEngine And Engine Cooling
I OWN A CHEVROLET 2500HD EQUIPPED WITH A 8.1 LITER ENGINE AND ALLISON TRANSMISSION. MY PROBLEM BEGAN WITH THE ENGINE REFUSING TO START AFTER BEING DRIVEN A SHORT WHILE. THIS PROBLEM DID NOT OCCUR EVERY TIME BUT WAS FREQUENT ENOUGH TO BE OF CONCERN. AFTER SEVERAL ATTEMPTS LASTING SOME 2 TO THREE MINUTES THE ENGINE WOULD START.…
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I OWN A CHEVROLET 2500HD EQUIPPED WITH A 8.1 LITER ENGINE AND ALLISON TRANSMISSION. MY PROBLEM BEGAN WITH THE ENGINE REFUSING TO START AFTER BEING DRIVEN A SHORT WHILE. THIS PROBLEM DID NOT OCCUR EVERY TIME BUT WAS FREQUENT ENOUGH TO BE OF CONCERN. AFTER SEVERAL ATTEMPTS LASTING SOME 2 TO THREE MINUTES THE ENGINE WOULD START. THE PROBLEM ESCALATED TO THE ENGINE STALLING WHILE DRIVING ON THE HIGHWAY, SOMETIMES ON THE INTERSTATE AT SPEEDS UP TO 70 MPH. DURING THESE STALLS THE ENGINE WOULD SOMETIME RESTART ON ITS OWN WITHOUT TURNING THE KEY OR SHIFTING OUT OF GEAR. DURING TIMES OF STALLING THE ONLY WAY TO MAINTAIN SOME CONTROL OF THE VEHICLE IS TO SHIFT INTO NEUTRAL AND TURN THE KEY TO ATTEMPT A RESTART. AT THESE TIMES THE ENGINE TURNING OVER PROVIDES ENOUGH COMPRESSION TO ALLOW THE POWER STEERING AND BRAKES TO BE AFFECTIVE AS LONG AS THE STARTER IS ENGAGED. *JB
NHTSA ODI #10167340
67,000 miles · Aug 18, 2006
Engine And Engine Cooling
DT*: THE CONTACT STATED THE VEHICLE STALLED SUDDENLY WITHOUT WARNING WHILE DRIVING AT HIGHWAY SPEEDS. AN INDEPENDENT REPAIR SHOP DETERMINED THE CRANK SHAFT POSITION SENSOR WAS BAD AND NEEDED TO BE REPLACED. THE CONTACT EXPRESSED THIS INCIDENT SHOULD BE INCLUDED IN THE ONGOING INVESTIGATION NHTSA ACTION NUMBER: PE06016, REGARDI…
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DT*: THE CONTACT STATED THE VEHICLE STALLED SUDDENLY WITHOUT WARNING WHILE DRIVING AT HIGHWAY SPEEDS. AN INDEPENDENT REPAIR SHOP DETERMINED THE CRANK SHAFT POSITION SENSOR WAS BAD AND NEEDED TO BE REPLACED. THE CONTACT EXPRESSED THIS INCIDENT SHOULD BE INCLUDED IN THE ONGOING INVESTIGATION NHTSA ACTION NUMBER: PE06016, REGARDING THE ENGINE AND ENGINE COOLING.
NHTSA ODI #10165935
122,000 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
15,000 miles · Jun 12, 2006
Power Train
I OWN A 2001 CHEVROLET SILVERADO 4X4 2500HD. I HAVE COMPLAINED ABOUT THE TRANSMISSION SLIPPING OUT OF GEAR AND BECOMING NEUTRAL WHEN STOPPING AFTER A HOT SOAK OR CITY DRIVING. AFTER A DELAY IT WILL RE-ENGAGE, OR IF YOU GAS IT A LITTLE IT WILL CLUNK INTO GEAR. THE DEALER HAS TOLD ME ALL ALONG THAT NOTHING WAS WRONG. HE COULDN…
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I OWN A 2001 CHEVROLET SILVERADO 4X4 2500HD. I HAVE COMPLAINED ABOUT THE TRANSMISSION SLIPPING OUT OF GEAR AND BECOMING NEUTRAL WHEN STOPPING AFTER A HOT SOAK OR CITY DRIVING. AFTER A DELAY IT WILL RE-ENGAGE, OR IF YOU GAS IT A LITTLE IT WILL CLUNK INTO GEAR. THE DEALER HAS TOLD ME ALL ALONG THAT NOTHING WAS WRONG. HE COULDN'T "DUPLICATE THE PROBLEM." NOW AT 75,000 MILES, THE TRANSMISSION HAS MANIFESTED ITSELF TO AN OBVIOUS STATE OF CRAP. DURING A RECENT DAY OF ERRANDS IN 100+ DEGREE DAY, THE TRANSMISSION WAS SLIPPING OUT OF GEAR AT EVERY RED LIGHT. UNACCEPTABLE. *NM
NHTSA ODI #10159646
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
20,012 miles · Feb 26, 2006
Parking BrakeService Brakes, Hydraulic
UNWANTED ANTI-LOCK BRAKE SYSTEM (ABS) DURING LOW SPEED BRAKING APPLICATIONS. WHICH COULD RESULT IN A CRASH. RECALL NUMBER:05V379000. *JB
NHTSA ODI #10151256
59,271 miles · Feb 24, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED THERE WERE GRINDING NOISES AND AN INCREASED STOPPING DISTANCE WHILE BRAKE PRESSURE WAS APPLIED AT VARIOUS SPEEDS. THE VEHICLE WAS SEEN BY A DEALER. THE DEALER DETERMINED THE BRAKE DISCS DEFOLIATED AND THERE WAS METAL ON METAL RESULTING IN POOR BRAKING. THE DEALERSHIP REPLACED THE BRAKE PADS AND ROTORS…
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DT*: THE CONTACT STATED THERE WERE GRINDING NOISES AND AN INCREASED STOPPING DISTANCE WHILE BRAKE PRESSURE WAS APPLIED AT VARIOUS SPEEDS. THE VEHICLE WAS SEEN BY A DEALER. THE DEALER DETERMINED THE BRAKE DISCS DEFOLIATED AND THERE WAS METAL ON METAL RESULTING IN POOR BRAKING. THE DEALERSHIP REPLACED THE BRAKE PADS AND ROTORS WHICH CORRECTED THE PROBLEM.
NHTSA ODI #10151121
88,000 miles · Feb 13, 2006
Power Train
AXLE NUT CAME LOOSE ON RIGHT FRONT OF MY 2001 CHEVY 2500 HD SEVERELY AFFECTED HANDLING, WHEEL COULD HAVE FALLEN OFF, REPLACED WHEEL BEARING AND AXLE NUT. *JB
NHTSA ODI #10150077
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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