NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports47,000 miles · Apr 21, 2010
Power TrainService Brakes, Hydraulic
2001 CHEVY SILVERADO 2500 HD 50,000 MILES HYDRAULIC BRAKE LINES ARE EXCESSIVELY RUSTED AND HAVE FAILED I AM NOW IN THE PROCESS OF HAVING TO REPLACE ALL BRAKE LINES FROM THE MASTER CYLINDER TO THE WHEELS. BRAKE LINES BROKE WHEN COMING TO A STOP. FRAME IS ALSO EXCESSIVELY RUSTED. IN NOVEMBER 2009 ALL ALLISON TRANSMISSION LINE…
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2001 CHEVY SILVERADO 2500 HD 50,000 MILES HYDRAULIC BRAKE LINES ARE EXCESSIVELY RUSTED AND HAVE FAILED I AM NOW IN THE PROCESS OF HAVING TO REPLACE ALL BRAKE LINES FROM THE MASTER CYLINDER TO THE WHEELS. BRAKE LINES BROKE WHEN COMING TO A STOP. FRAME IS ALSO EXCESSIVELY RUSTED. IN NOVEMBER 2009 ALL ALLISON TRANSMISSION LINE WERE RUSTED THROUGH AND ALSO NEEDED TO BE REPLACED AS WELL AS THE COOLER COIL. *TR
NHTSA ODI #10326847
132,937 miles · Apr 20, 2010
Service Brakes, Hydraulic
WHILE PULLING IN THE DRIVEWAY, I STEPPED ON THE BRAKE PEDAL AND HAD VERY LITTLE BRAKING. I HAD TO APPLY EMERGENCY BRAKE TO KEEP FROM HITTING GARAGE. INSPECTION REVEALED THE FRONT BRAKE LINE HAD RUSTED THROUGH AND WAS LEAKING. *TR
NHTSA ODI #10326720
110,000 miles · Apr 20, 2010
Service Brakes, HydraulicCrashInjury
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT WHILE APPROACHING A STOP LIGHT AT 25 MPH WITH THE BRAKES APPLIED, THEY WOULD NOT ENGAGE. THE VEHICLE PROCEEDED TO CRASH INTO ANOTHER VEHICLE. A VEHICLE OCCUPANT WAS INJURED AND TRANSPORTED TO THE HOSPITAL. THE VEHICLE SUSTAINED SUBSTANTIAL FRONT END…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT WHILE APPROACHING A STOP LIGHT AT 25 MPH WITH THE BRAKES APPLIED, THEY WOULD NOT ENGAGE. THE VEHICLE PROCEEDED TO CRASH INTO ANOTHER VEHICLE. A VEHICLE OCCUPANT WAS INJURED AND TRANSPORTED TO THE HOSPITAL. THE VEHICLE SUSTAINED SUBSTANTIAL FRONT END DAMAGE. UPON FURTHER INSPECTION, THE FAILURE WAS CONTRIBUTED TO BRAKE LINE FAILURE. THE MANUFACTURER WAS NOT CONTACTED. THE VIN WAS NOT AVAILABLE. THE FAILURE MILEAGE WAS 110,000.
NHTSA ODI #10326705
113,000 miles · Apr 12, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH COMING TO A COMPLETE STOP. THE BRAKES WERE ENGAGED, FOLLOWED BY A HUMMING NOISE AND A NO POWER RESPONSE. THE BRAKE PEDAL BEGAN TO FADE AND THEN RESPONDED NORMALLY. THE CONTACT STATED THAT THERE WAS A FAILURE WITHIN THE BRAKE SYSTEM SENSO…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO. THE CONTACT WAS DRIVING APPROXIMATELY 35 MPH COMING TO A COMPLETE STOP. THE BRAKES WERE ENGAGED, FOLLOWED BY A HUMMING NOISE AND A NO POWER RESPONSE. THE BRAKE PEDAL BEGAN TO FADE AND THEN RESPONDED NORMALLY. THE CONTACT STATED THAT THERE WAS A FAILURE WITHIN THE BRAKE SYSTEM SENSOR. THE FAILURE OCCURRED WHENEVER ATTEMPTING TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER AND REPAIRED IN 2006. THE DEALER WAS NOTIFIED ON A SEPARATE OCCASION FOR THE IDENTICAL FAILURE AND REFUSED TO CORRECT THE FAILURE. THE FAILURE MILEAGE WAS 113,000. THE CURRENT MILEAGE WAS 118,000.
NHTSA ODI #10325076
61,000 miles · Apr 10, 2010
Service Brakes, ElectricCrash
I WAS DRIVING ABOUT 25 MPH APPROACHING A RED LIGHT. I HIT BRAKES TO SLOW DOWN AS I APPROACHED THE REAR OF THE VEHICLE AHEAD OF ME (ALREADY STOPPED). THE BRAKES WERE FUNCTIONING PROPERLY, THEN WHEN I SLOWED TO ABOUT 5 MPH THE BRAKE PEDAL SUDDENLY WENT TO THE FLOOR AND THE BRAKES STOPPED WORKING AND I HIT THE VEHICLE AHEAD OF ME…
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I WAS DRIVING ABOUT 25 MPH APPROACHING A RED LIGHT. I HIT BRAKES TO SLOW DOWN AS I APPROACHED THE REAR OF THE VEHICLE AHEAD OF ME (ALREADY STOPPED). THE BRAKES WERE FUNCTIONING PROPERLY, THEN WHEN I SLOWED TO ABOUT 5 MPH THE BRAKE PEDAL SUDDENLY WENT TO THE FLOOR AND THE BRAKES STOPPED WORKING AND I HIT THE VEHICLE AHEAD OF ME AT ABOUT 5 MPH. THE AIR BAGS DID NOT GO OFF. AFTER THE ACCIDENT MY BRAKES WORKED AND I DROVE HOME. MY MECHANIC AND MY INSURANCE ADJUSTER WERE BOTH FAMILIAR WITH THE PROBLEM. THEY SAID MY WHEEL BEARING HAD CORROSION AND IT CAUSED THE ABS SENSOR IN THE WHEEL BEARING TO NOT WORK PROPERLY AND TO DISABLE MY ABS BRAKING SYSTEM. *TR
NHTSA ODI #10324867
52,000 miles · Apr 8, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SUDDENLY STALLED WITHOUT WARNING. ON THE THIRD ATTEMPT, THE VEHICLE RESTARTED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS WHETHER THE VEHICLE WAS IN MOTION OR NOT. AN AUTHORIZED DEALER INFORMED HIM THAT THE PROBLEM COULD NOT BE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SUDDENLY STALLED WITHOUT WARNING. ON THE THIRD ATTEMPT, THE VEHICLE RESTARTED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS WHETHER THE VEHICLE WAS IN MOTION OR NOT. AN AUTHORIZED DEALER INFORMED HIM THAT THE PROBLEM COULD NOT BE DIAGNOSED WITHOUT AN INDICATOR LIGHT BEING ILLUMINATED. THE VEHICLE WAS TAKEN TO SEVERAL INDEPENDENT MECHANICS BUT IT WAS VERIFIED THAT NO DIAGNOSIS COULD BE GIVEN WITHOUT AN INDICATOR LIGHT. THE CURRENT MILEAGE IS APPROXIMATELY 81,000. THE FAILURE MILEAGE WAS APPROXIMATELY 52,000. UPDATED EVOQ 11/02/10
NHTSA ODI #10324458
238,446 miles · Apr 8, 2010
Service Brakes, Hydraulic
LOW SPEED UNWANTED ANTILOCK BRAKE SYSTEM ACTIVATION. *TR
NHTSA ODI #10324440
238,446 miles · Apr 8, 2010
Service Brakes, Hydraulic
LOW SPEED UNWANTED ANTILOCK BRAKE SYSTEM ACTIVATION. *TR
NHTSA ODI #10324436
75,000 miles · Mar 23, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING AT APPROXIMATE SPEEDS OF 50-60 MPH ON NORMAL ROAD CONDITIONS, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO RESTART THE VEHICLE WITHIN A FEW MOMENTS AND IT WAS TAKEN TO AN AUTHORIZED DEALER FOR FURTHER INSPECTION. THE DEALER REPLACED THE CRANKSHAF…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING AT APPROXIMATE SPEEDS OF 50-60 MPH ON NORMAL ROAD CONDITIONS, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO RESTART THE VEHICLE WITHIN A FEW MOMENTS AND IT WAS TAKEN TO AN AUTHORIZED DEALER FOR FURTHER INSPECTION. THE DEALER REPLACED THE CRANKSHAFT POSITION SENSOR AT THE OWNERS EXPENSE. ALTHOUGH THERE WAS A RECALL ON HIS MODEL VEHICLE, THERE WERE NO RECALLS FOR HIS SPECIFIC YEAR (NHTSA CAMPAIGN ID NUMBER 07V521000: ENGINE AND ENGINE COOLING). THE CONTACT CONFIRMED THAT THE FAILURE HE EXPERIENCED WAS IDENTICAL TO THE FAILURES AS DESCRIBED IN THE RECALL CAMPAIGN. HE STATED THAT THE FAILURE WOULD OCCUR INTERMITTENTLY. THE FAILURE MILEAGE WAS 75,000. UPDATED 05/11/10.*LJ UPDATED 06/25/10*LJ UPDATED 08/30/10*JB
NHTSA ODI #10321552
62,000 miles · Dec 16, 2009
Electrical System
PULLING AWAY FROM A STOP LIGHT, THE MOTOR AND ELECTRICAL SYSTEM SHUT DOWN. I COASTED OVER TO THE SIDE OF THE ROAD -- CONSTITUTING A TRAFFIC HAZARD TO OTHER MOTORISTS- AND RE-STARTED THE VEHICLE. THERE WERE NO OTHER INCIDENTS THAT DAY. MY SON AND DAUGHTER IN LAW REPORT SIMILAR EXPERIENCES ON SEPARATE OCCASIONS. *TR
NHTSA ODI #10296051
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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