IllustrationWHEN SLOWING DOWN TO STOP, WHILE AT LOW SPEED, USING THE BRAKES ENGAGES THE ABS SYSTEM AND STEERING BECOMES SUDDENLY DIFFICULT.
2001 Chevrolet Silverado 2500
Owner reports · Recalls · Investigations
More warning signs than most Silverado 2500 years
Owner complaints for the 2001 Chevrolet Silverado 2500 are substantially higher than the model-year median of 81.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 2500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
270–25K
3725–50K
5550–75K
5275–100K
53100–150K
31150K+
255 reports with mileage · 45 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 78 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine And Engine Cooling. Review the 62 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 55 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
11 crash reports3 fire reports4 injury reports
Steering complaints
17 reportsWHILE DRIVING ON A RURAL COUNTRY ROAD I SOUNDLY AND WITHOUT WARNONG LOST MY POWER BRAKES AND STEERING. . STEERING WAS VERY DIFFICULT AND BRAKES WERE ALMOST NOT FUNCTIONAL. I TOOK A GREAT EFFORT TO TURN THE STEERING WHEEL AND APPLY THE BRAKES TO SAFELY STOP THE VEHICLE. IF I WAS TRAVELING IN TRAFFIC AT HIGHWAY SPEEDS I COULD NO…
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WHILE DRIVING ON A RURAL COUNTRY ROAD I SOUNDLY AND WITHOUT WARNONG LOST MY POWER BRAKES AND STEERING. . STEERING WAS VERY DIFFICULT AND BRAKES WERE ALMOST NOT FUNCTIONAL. I TOOK A GREAT EFFORT TO TURN THE STEERING WHEEL AND APPLY THE BRAKES TO SAFELY STOP THE VEHICLE. IF I WAS TRAVELING IN TRAFFIC AT HIGHWAY SPEEDS I COULD NOT CONTROL AND SAFELY STOP THE VEHICLE.. I IMMEDIATELY PARKED THE VEHICLE AND HAD IT TOWED TO A NEARBY DEALERSHIP. THE POWER STEERING PUMP WAS REPLACED. SO THE POWER STEERING PUMP MALFUNCTIONED (BROKEN SHAFT) WHILE THE VEHICLE WAS UNDERWAY.. THE POWER STEERING MALFUNCTION AFFECTED BOTH THE POWER STEERING AND BRAKES AND THERE WAS NO WARNING. I FEEL THIS IS A POOR DESIGN. MINIMALLY THERE SHOULD BE SOME SORT OF WARNING WHEN THE POWER STEERING AND OR POWER BRAKES ARE COMPROMISED. AS I UNDERSTAND IT THIS SAME ISSUE OCCURS WHEN THE SERPENTINE BELT FAILS. THE BELT WILL FAIL WHEN THE BELT TENSIONER DOES. AGAIN NO WARNING WHEN THIS OCCURS.
TL* THE CONTACT OWNS A 2001 CHEVROLET 2500 HD. WHILE DRIVING AT 40 MPH, THE VEHICLE STALLED AND THE STEERING WHEEL SEIZED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT THE CRANK SHAFT POSITION SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMAT…
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TL* THE CONTACT OWNS A 2001 CHEVROLET 2500 HD. WHILE DRIVING AT 40 MPH, THE VEHICLE STALLED AND THE STEERING WHEEL SEIZED. THE VEHICLE WAS TAKEN TO A DEALER WHERE IT WAS DIAGNOSED THAT THE CRANK SHAFT POSITION SENSOR NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 65,000.
THE VEHICLE STALLED WHILE DRIVING DOWN A RAMP TO HIGHWAY 41. POWER BRAKES AND STEERING DID NOT WORK AS THE ENGINE WAS DEAD. THE VEHICLE HAD TO BE CRANKED REPEATEDLY TO GET IT TO RESTART. THIS WAS THE FIRST INCIDENT THAT I REMEMBER, BUT IT HAPPENED AGAIN MANY TIMES OVER THE YEARS WITHOUT WARNING. FINALLY THIS YEAR AFTER SOME RESE…
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THE VEHICLE STALLED WHILE DRIVING DOWN A RAMP TO HIGHWAY 41. POWER BRAKES AND STEERING DID NOT WORK AS THE ENGINE WAS DEAD. THE VEHICLE HAD TO BE CRANKED REPEATEDLY TO GET IT TO RESTART. THIS WAS THE FIRST INCIDENT THAT I REMEMBER, BUT IT HAPPENED AGAIN MANY TIMES OVER THE YEARS WITHOUT WARNING. FINALLY THIS YEAR AFTER SOME RESEARCH I FOUND THAT THE PROBLEM WAS CAUSED BY A FAULTY CRANK POSITION SENSOR. I LEARNED THERE WAS A RECALL (NHTSA - EA06016) FOR THIS BUT GM SAID MY VEHICLE WAS NOT COVERED BY IT EVEN THOUGH IT WAS THE SAME PROBLEM IDENTIFIED IN THE RECALL. I HAVE READ REPORTS OF OTHERS THAT HAD THE SAME FAILURE BUT GM HAS REFUSED TO FIX SAYING THE VEHICLE WAS NOT INCLUDED IN THE RECALL. I BELIEVE THE RECALL SHOULD BE EXPANDED AS THIS IS A SERIOUS PROBLEM THAT COULD CAUSE AN ACCIDENT. THE CRANKSHAFT POSITION SENSOR WAS REPLACED AND THE PROBLEM HAS BEEN SOLVED. I HAVE THE OLD SENSOR IF NEEDED FOR TESTING.
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT A RUBBING SOUND EMITTED FROM THE STEERING COLUMN WHENEVER MAKING A TURN. THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR A DIAGNOSTIC TESTING. THE TECHNICIAN DIAGNOSED THAT A NEW STEERING COLUMN WAS NEEDED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTUR…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT A RUBBING SOUND EMITTED FROM THE STEERING COLUMN WHENEVER MAKING A TURN. THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR A DIAGNOSTIC TESTING. THE TECHNICIAN DIAGNOSED THAT A NEW STEERING COLUMN WAS NEEDED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 215,000.
MY 2001 CHEVY SILVERADO 2500HD WITH THE 8.1 ENGINE WILL STALL AT ANYTIME. IT HAS HAPPENED WHEN SITTING IDLE, TAKING OFF FROM A LIGHT, AND I'VE EVEN HAD IT HAPPEN DOING 50 MPH. I REFUSE TO LET SOMEONE BORROW MY TRUCK BECAUSE I'M AFRAID THEY WILL PANIC AND GET IN AN ACCIDENT. IT IS ESPECIALLY DANGEROUS SINCE YOU LOSE POWER STEERIN…
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MY 2001 CHEVY SILVERADO 2500HD WITH THE 8.1 ENGINE WILL STALL AT ANYTIME. IT HAS HAPPENED WHEN SITTING IDLE, TAKING OFF FROM A LIGHT, AND I'VE EVEN HAD IT HAPPEN DOING 50 MPH. I REFUSE TO LET SOMEONE BORROW MY TRUCK BECAUSE I'M AFRAID THEY WILL PANIC AND GET IN AN ACCIDENT. IT IS ESPECIALLY DANGEROUS SINCE YOU LOSE POWER STEERING AND BASICALLY HAVE NO CONTROL OF THE VEHICLE. SOMETIMES I CAN DRIVE FOR 50 MILES AND NOT HAVE A PROBLEM AND OTHER TIMES IT WILL STALL TWICE IN 30 MINUTES. SO THERE SEEMS TO BE NO RHYME OR REASON. I DO NOT UNDERSTAND WHY THERE HAS NOT BEEN A RECALL ISSUED FOR THIS PROBLEM. *TR
GOING DOWN THE HIGHWAY AT APPROX 60 MILES PER HOUR. TRUCK TURNED OFF. THIS HAS HAPPENED SEVERAL TIMES. ALL ELECTRICAL APPEARS TO BE WORKING. OTHER TRUCKS WITH SAME MODEL YEAR HAD A RECALL UNDER GM RECALL NO. 06083. I HAVE THE SAME ENGINE BUT THEY SAY MINE IS NOT SUBJECT TO THE RECALL. *TR
TRAVELING AT 65 MPH BRAKES ALL OF A SUDDEN THE BRAKES WERE APPLIED W/O APPLYING THEM LOSS OF STEERING CONTROL ETC. EVALUATING THIS PROBLEM II SAW THAT THE BRAKE PEDAL WAS GOING DOWN TO THE FLOOR, SO I PULLED UP ON IT WITH MY FOOT AND THE BRAKES RELEASED BUT STEERING CONTROL DID NOT RESUME. I GOT OFF AT THE NEXT EXIT AND VERY SL…
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TRAVELING AT 65 MPH BRAKES ALL OF A SUDDEN THE BRAKES WERE APPLIED W/O APPLYING THEM LOSS OF STEERING CONTROL ETC. EVALUATING THIS PROBLEM II SAW THAT THE BRAKE PEDAL WAS GOING DOWN TO THE FLOOR, SO I PULLED UP ON IT WITH MY FOOT AND THE BRAKES RELEASED BUT STEERING CONTROL DID NOT RESUME. I GOT OFF AT THE NEXT EXIT AND VERY SLOWLY MADE MY WAY ON HOME. ANY APPLICATION OF THE BRAKE PEDAL RESULTED IN BRAKES LOCKING UP AND THEY WERE APPLIED SO TIGHTLY THAT ANY ACCELERATION COULD NOT SPEED UP UNLESS I PULLED UP ON THE BRAKE PEDAL. UPON ARRIVING HOME LOOKED THINGS OVER NO POWER STEERING UNLESS MOTOR WAS AT HIGH RPM,POWER STEERING PUMP LOOKED AS IF IT EXPELLED FLUID OUT THE BREATHER CAP AND THE BRAKES SMELLED AS IF VERY HOT. NOW THAT THIS HAPPENED I RECOGNIZED THIS HAD HAPPENED BEFORE BUT SOMEHOW REPAIRED ITSELF,BUT NOT TO THIS EXTREME. I SUFFERED BRUISES FROM SHOULDER HARNESS AND SEATBELT AND SOME KNOTS ON MY HEAD FROM BEING THROWN AROUND I CAME SO CLOSE TO OUT OF CONTROL AND A ROLLOVER SIMPLY COULDN'T CONTROL MY TRUCK. *TR
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. ON MARCH 2, 2007, WHILE DRIVING 70M PH THE CONTACT NOTICED ONCOMING TRAFFIC, AND WHEN ATTEMPTING TO APPLY THE BRAKES THEY FAILED. THE CONTACT WAS UNABLE TO GAIN CONTROL OF THE STEERING WHEEL. THE DEALER ADVISED THE CONTACT THAT THERE WAS A LINE IN THE POWER STEERING BO…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. ON MARCH 2, 2007, WHILE DRIVING 70M PH THE CONTACT NOTICED ONCOMING TRAFFIC, AND WHEN ATTEMPTING TO APPLY THE BRAKES THEY FAILED. THE CONTACT WAS UNABLE TO GAIN CONTROL OF THE STEERING WHEEL. THE DEALER ADVISED THE CONTACT THAT THERE WAS A LINE IN THE POWER STEERING BOOSTER THAT CAUSED THE FAILURE. THE MANUFACTURER STATED THAT THERE WAS NOTHING THEY COULD DO TO ASSIST THE CONTACT WITH THE REPAIRS. THE CURRENT AND FAILURE MILEAGE WAS 70,000. *AK UPDATED 04/05/07. *JB
FOUND FLUID ON FLOOR UNDERNEATH MOTOR AREA. CHECKED POWER STEERING RESERVOIR AND FOUND IT TO BE FULL. I FOUND I HAD LOST POWER STEERING, WHEN I PUT VEHICLE IN GEAR TO MOVE OUT OF GARAGE AREA, I FOUND THAT I HAD ALSO LOST MY BRAKES. (PEDAL WENT TO THE FLOOR) I WAS THANKFUL THAT I WAS NOT ON THE HIGHWAY PULLING A TRAILER AT THIS …
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FOUND FLUID ON FLOOR UNDERNEATH MOTOR AREA. CHECKED POWER STEERING RESERVOIR AND FOUND IT TO BE FULL. I FOUND I HAD LOST POWER STEERING, WHEN I PUT VEHICLE IN GEAR TO MOVE OUT OF GARAGE AREA, I FOUND THAT I HAD ALSO LOST MY BRAKES. (PEDAL WENT TO THE FLOOR) I WAS THANKFUL THAT I WAS NOT ON THE HIGHWAY PULLING A TRAILER AT THIS TIME. NO POWER STEERING AND NO BRAKES. I CONTACTED POWER CHEVROLET IN VALENCIA AND THEY TOLD ME NOT TO DRIVE THE VEHICLE BUT TO HAVE IT TOWED TO THEIR LOCATION. WHEN THE VEHICLE ARRIVED AT THE DEALERSHIP AND WAS REMOVED FROM THE TOW TRUCK, A SERVICE REPRESENTATIVE WAS ABLE TO MOVE THE VEHICLE. HE STATED THAT IT HAD BOTH POWER STEERING AND BRAKES. THE SERVICE REPRESENTATIVE DROVE THE TRUCK AROUND THE LOT SEVERAL TIMES TO DEMONSTRATE THAT EVERYTHING WAS WORKING FINE. AT THE CONCLUSION OF HIS LAST TRIP AROUND THE LOT, THE BRAKE PEDAL WENT TO THE FLOOR. I RECEIVED A CALL FROM THE SERVICE DEPARTMENT SUGGESTING THAT I CHANGE THE POWER STEERING PUMP. I WAS NOT COMFORTABLE ABOUT THIS SUGGESTION SINCE I HAD ALSO LOST MY BRAKES. THE ONE COMPONENT PART THAT AFFECTS BOTH POWER STEERING AND BRAKES IS THE HYDRO-BOOSTER. I HAD THEM REPLACE THE POWER STEERING PUMP AND HYRO-BOOSTER. THEY CLAIM THERE HAVE NOT BEEN ANY RECALLS ON EITHER OF THESE PARTS. *JB
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
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.