IllustrationFUEL IS DUMPING INTO INJECTORS. 2001 GMC SIERRA 2500 DIESEL. ONLY HAS 135,000 MILES!! ENGINE BOGGS DOWN WHEN CLIMBING HILL, BRIDGE, OR TOWING.
2001 GMC Sierra 2500
Owner reports · Recalls · Investigations
More warning signs than most Sierra 2500 years
Owner complaints for the 2001 GMC Sierra 2500 are substantially higher than the model-year median of 46.
About this comparison →How this year compares
Owner complaints by model year
Compare all Sierra 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
60–25K
3025–50K
2450–75K
1375–100K
20100–150K
18150K+
111 reports with mileage · 23 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 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine And Engine Cooling. Review the 21 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 13 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 reports2 fire reports6 injury reports
Engine complaints
8 reportsTL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. WHILE DRIVING VARIOUS SPEEDS, THE ENGINE SUDDENLY LOST COMPRESSION AND THE VEHICLE FAILED TO ACCELERATE PROPERLY. THE VEHICLE WAS TAKEN TO COURTESY CADILLAC (1345 EVANGELINE THRUWAY, BROUSSARD, LA) WHERE IT WAS DIAGNOSED THAT ONE OR MORE FUEL INJECTORS WERE FAULTY AND REMAINED OPEN. T…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. WHILE DRIVING VARIOUS SPEEDS, THE ENGINE SUDDENLY LOST COMPRESSION AND THE VEHICLE FAILED TO ACCELERATE PROPERLY. THE VEHICLE WAS TAKEN TO COURTESY CADILLAC (1345 EVANGELINE THRUWAY, BROUSSARD, LA) WHERE IT WAS DIAGNOSED THAT ONE OR MORE FUEL INJECTORS WERE FAULTY AND REMAINED OPEN. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED AND DID NOT ASSIST. THE CONTACT INDICATED THAT ALL EIGHT FUEL INJECTORS WERE PREVIOUSLY REPLACED APPROXIMATELY FIVE YEARS; HOWEVER, BUT THE FAILURE RECENTLY RECURRED. THE FAILURE MILEAGE WAS 200,000.
VEHICLE STALLS AND SHUTS OFF WHILE DRIVING AND IDLE. SOMETIMES IT STARTS BACK UP IMMEDIATELY, OTHER TIMES IT WILL JUST CRANK OVER BUT WILL NOT START. AFTER LETTING IT SIT SOMETIMES 5 TO 20 MINUTES AT A TIME IT WILL THEN START BACK UP. ALL RESEARCH AND ISSUES WITH THE VEHICLE INDICATE A MANUFACTURER RECALL OF A CRANKSHAFT POSITI…
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VEHICLE STALLS AND SHUTS OFF WHILE DRIVING AND IDLE. SOMETIMES IT STARTS BACK UP IMMEDIATELY, OTHER TIMES IT WILL JUST CRANK OVER BUT WILL NOT START. AFTER LETTING IT SIT SOMETIMES 5 TO 20 MINUTES AT A TIME IT WILL THEN START BACK UP. ALL RESEARCH AND ISSUES WITH THE VEHICLE INDICATE A MANUFACTURER RECALL OF A CRANKSHAFT POSITION SENSOR. THE VEHICLE WILL STALL OR SHUT OFF AT RANDOM WHETHER IT'S IN MOTION DOWN THE HIGHWAY IN THE MIDDLE OF A INTERSECTION OR AT A STOP SIGN . I HAVE ALMOST BEEN T-BONES DUE TO THE VEHICLE STALLING IN THE MIDDLE OF THE INTERSECTION AND I HAVE ALSO HAD TO REPLACE MY DRIVERS MIRROR DUE TO THE VEHICLE STALLING ON THE INTERSTATE AND NEARLY BEING HIT BY ANOTHER VEHICLE. *TR
EXHAUST MANIFOLD LEAK DUE TO BROKEN EXHAUST MANIFOLD BOLT. I AM THE ORIGINAL OWNER OF THE VEHICLE. THE VEHICLE HAS BEEN REGULARLY AND PROPERLY MAINTAINED. I UNDERSTAND THIS IS A COMMON PROBLEM FOR THIS GM VEHICLE DUE TO DEFECTIVE PARTS. I PURCHASED THIS VEHICLE NEW FROM A LOCAL GMC DEALER. *TR
TRUCK JUST SHUTS DOWN WHILE DRIVING, COAST TO SAFEST PULL OVER, TURN KEY OFF, SIT AND WAIT A MINUTE, SOMETIMES LONGER, TRY TO START ENGINE, USUALLY STARTS, SOMETIMES LONGER WAITS. OTHER THEN THE APPARENT SAFETY POSSIBILITIES, DIDN'T THINK MUCH ABOUT IT. WELL, THIS WOULD HAPPEN EVERY ONCE & AWHILE. FOR OVER A YEAR NOW, LAST 3 …
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TRUCK JUST SHUTS DOWN WHILE DRIVING, COAST TO SAFEST PULL OVER, TURN KEY OFF, SIT AND WAIT A MINUTE, SOMETIMES LONGER, TRY TO START ENGINE, USUALLY STARTS, SOMETIMES LONGER WAITS. OTHER THEN THE APPARENT SAFETY POSSIBILITIES, DIDN'T THINK MUCH ABOUT IT. WELL, THIS WOULD HAPPEN EVERY ONCE & AWHILE. FOR OVER A YEAR NOW, LAST 3 MONTHS WITH INCREASING OCCURRENCES. TRUCK OUT OF WARRANTY, SO I HAVE IT SERVICED LOCALLY, DAVE COTE AUTOMOTIVE, A GM TRAINED TECHNICIAN WITH 30 YEARS EXPERIENCE, PROBLEM DIAGNOSED, CRANKSHAFT POSITION SENSOR AT THE REAR OF THE 8.1 L ENGINE. TECHNICIAN COTE HAS EXTREMELY DIFFICULT TIME REMOVING SENSOR, AT THIS WRITING STILL NO WORD. COTE GOES ON LINE TO SEEK ONLINE HELP FROM OTHER TECH'S AND DISCOVERS A SUPPOSED RECALL FOR MY YEAR AND MODEL TRUCK, THAT I NEVER RECEIVED. I ENQUIRE AT THE LOCAL DEALER VENDEHTTI MOTORS, FRANKLIN, MA ABOUT IT AFTER SUPPLYING THE VIN NUMBER, THEY TELL ME THAT MY VIN IS NOT INCLUDED WITH THE RECALL? I SAY TO THEM THAT "HOW CAN THAT BE WHEN IT IS DOING WHAT THE RECALL WAS FOR" & THEY SAID "THE PROBLEM WAS FIXED AT THE FACTORY BEFORE MY TRUCK WAS MANUFACTURED"? SO I AM ASKING WHY I WILL HAVE TO PAY POSSIBLY THOUSANDS OF DOLLARS THAT I CAN NOT AFFORD AT PRESENT, WHEN OBVIOUSLY THE PROBLEM WAS NEVER FIXED TO BEGIN WITH. SENSOR IN BAD LOCATION. I OWN A SMALL LANDSCAPE MAINTENANCE CO. MOSTLY MOWING & SEASONAL CLEAN-UPS, I WAS EXPECTING TO USE THIS TRUCK TILL I HAD TO RETIRE. IT IS MY SOLE MEANS TO OPERATE PLOWING & LANDSCAPING BUSINESS. I CAN NOT AFFORD A NEW TRUCK. THIS TRUCK HAS LESS THEN 45,000 MILES ON IT, IT IS USED LOCALLY ONLY, LESS THEN 4,000 MI. A YEAR, I HAVE MAINTAINED IT WELL. NO MAJOR ACCIDENTS, LITTLE PLOWING DENTS. CAN SOMEBODY PLEASE HELP ME WITH THIS PROBLEM. IT SEEMS THAT GM IS NOT ONLY HAVING RECENT DIFFICULTIES WITH ITS VEHICLES BUT HAS BEEN HIDING ALLOT FROM THE PUBLIC & GOVERNMENT! *TR
ENGINE STALLED AFTER PULLING OUT ONTO HIGHWAY THEN RESTARTED, ENGINE STALLED AT STOP LIGHT RESTARTED 5 MINUTES LATER , ENGINE STALLED IMMEDIATELY AFTER STARTING THEN STARTED TWO MINUTES LATER. GM RECALL #06083 CRANKSHAFT POSITION SENSOR FROM DEC. 11, 2007 NEEDS TO BE EXPANDED TO INCLUDE MORE OR MAYBE ALL 2001S WITH 8.1L V8 NOT …
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ENGINE STALLED AFTER PULLING OUT ONTO HIGHWAY THEN RESTARTED, ENGINE STALLED AT STOP LIGHT RESTARTED 5 MINUTES LATER , ENGINE STALLED IMMEDIATELY AFTER STARTING THEN STARTED TWO MINUTES LATER. GM RECALL #06083 CRANKSHAFT POSITION SENSOR FROM DEC. 11, 2007 NEEDS TO BE EXPANDED TO INCLUDE MORE OR MAYBE ALL 2001S WITH 8.1L V8 NOT JUST THE VIN # THAT ARE LISTED. *TR
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT THE CRANKSHAFT POSITION SENSOR FAILED AND WAS REPLACED. SIX YEARS LATER, THE CONTACT LOCATED A RECALL FOR THE FAILURE UNDER NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING). THE DEALER WAS CONTACTED BUT INFORMED HIM THAT HIS VIN WAS NOT INCLUD…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT THE CRANKSHAFT POSITION SENSOR FAILED AND WAS REPLACED. SIX YEARS LATER, THE CONTACT LOCATED A RECALL FOR THE FAILURE UNDER NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING). THE DEALER WAS CONTACTED BUT INFORMED HIM THAT HIS VIN WAS NOT INCLUDED IN THE RECALL AND HE COULD NOT BE REIMBURSED FOR THE REPAIRS. THE CONTACT CONFIRMED THAT THE VEHICLE WAS NOT INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS 60,358 AND THE CURRENT MILEAGE WAS 82,000. UPDATED 01/30/13*LJ THE CONSUMER STATED THAT THE ENGINEWOULD TURN OFF UNEXPECTEDLY, IT WOULD RESTART AFTER A PERIOD OF TIME. IT HAS SHUT OFF AT FREEWAY SPEED, CITY TRAFFIC, AND WHILE PARKING. UPDATED 1/31/2013 *JS
THE ENGINE DIED ON ME IN A PARKING LOT AND WOULDN'T RESTART FOR ABOUT 15-20 MINUTES. THE SECOND INCIDENCE WAS THE SAME. THE THIRD INCIDENT, IT STOPPED ON ME AS I WAS COMING OFF AN EXIT TO GET ON THE HIGHWAY. I HAD JUST REACHED 50 MPH WHEN IT CUT OUT. IT WOULD NOT RESTART FOR 15-20 MINUTES. THE NEXT AND FINAL EVENT BEFORE REACHIN…
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THE ENGINE DIED ON ME IN A PARKING LOT AND WOULDN'T RESTART FOR ABOUT 15-20 MINUTES. THE SECOND INCIDENCE WAS THE SAME. THE THIRD INCIDENT, IT STOPPED ON ME AS I WAS COMING OFF AN EXIT TO GET ON THE HIGHWAY. I HAD JUST REACHED 50 MPH WHEN IT CUT OUT. IT WOULD NOT RESTART FOR 15-20 MINUTES. THE NEXT AND FINAL EVENT BEFORE REACHING A RESOLUTION TO THE PROBLEM...THE TRUCK CUT OUT AS I WAS ON AN EXTREMELY DANGEROUS AND BUSY SECTION OF HIGHWAY DOING 60 MPH. I THANK GOD IT WAS A STRAIGHT STRETCH OR SOMETHING FATAL COULD HAVE OCCURED. IN BETWEEN EACH OF THESE EVENTS, I TOOK THE TRUCK TO THE MECHANIC AND TRIED DIFFERENT OXYGEN SENSORS AND OTHER REPAIRS THAT I WAS TOLD WASN'T A PROBLEM BUT I HAD NO OTHER EXPLANATION FOR WHAT HAPPENED. THERE WERE NO CODES THROWN FOR THE MECHANIC TO GO BY. AFTER THE LAST EVENT ON THE HIGHWAY, I TOOK IT TO THE DEALER AND TOLD THEM I WOULD NOT EXCEPT THE TRUCK BACK UNTIL THEY KNEW WHAT IT WAS. AFTER MUCH ARGUING, THEY AGREED TO REPLACE THE CRANKSHAFT POSITION SENSOR UPON MY REQUEST. THEY SAID IT WAS NOT THROWING A CODE FOR THAT AND THEY COULDN'T GUARANTEE IT WOULDN'T BREAK OFF DURING REPAIR AND RESULT IN AN EVEN COSTLIER REPAIR. I DIDN'T CARE AT THAT POINT AND TOLD THEM TO DO IT. I HAD READ MANY OTHER REPORTS ON MECHANIC SITES ABOUT THIS SENSOR BEING RECALLED ON SOME BUT NOT ALL GMC 2500 HD TRUCKS SO I INSISTED THE DEALER REPLACE MINE. MINE DID NOT FALL UNDER THE RECALLED VIN# SO IT WAS OUT OF POCKET FOR ME! IT FIXED THE PROBLEM. I HAVE NOT HAD A PROBLEM SINCE AND IT'S BEEN 2 YEARS NOW. I AM STILL UPSET AT THE LACK OF AGREEMENT ABOUT EXTENDING THE RECALL ON THIS ISSUE TO OTHER VIN#'S. THIS WAS A KNOWN PROBLEM THAT COULD HAVE GOTTEN NOT ONLY ME KILLED, BUT MY 2 YOUNG SONS WHO RIDE WITH ME EVERYWHERE. I AM VERY ANGRY AT THE MAKERS! NOTHING WILL FIX THAT. EVER.
Official recalls
201V220000 · Interior Lighting
Jun 26, 2001
VEHICLE DESCRIPTION: CERTAIN PICKUP TRUCKS EQUIPPED WITH 6.6L DIESEL ENGINES FAIL TO COMPLY WITH REQUIREMENTS OF FMVSS NO. 105, "HYDRAULIC AND ELECTRIC BRAKE SYSTEMS." THESE VEHICLES HAVE A BRAKE SYSTEM WARNING LIGHT IN THE INSTRUMENT CLUSTER THAT MAY NOT ILLUMINATE WHEN THE BRAKE FLUID IS LOW. IN ADDITION, WHEN THE BRAKE FLUID IS LOW, THE VEHICLE MAY NOT MEET THE PARTIAL SYSTEM REQUIREMENTS OF FMVSS NO. 105.
Consequence & remedy
Consequence: THESE CONDITIONS COULD RESULT IN REDUCED BRAKING CAPABILITY, WHICH COULD LEAD TO A CRASH.
Remedy: DEALERS WILL CHANGE THE LOCATION OF A WIRE CONNECTION IN THE UNDERHOOD BUSSED ELECTRICAL CENTER. OWNER NOTIFICATION BEGAN JULY 9, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.
01V125000 · Equipment:other:labels
Apr 10, 2001
VEHICLE DESCRIPTION: CERTAIN 2-WHEEL DRIVE PICKUP TRUCKS FAIL TO COMPLY WITH REQUIREMENTS OF FMVSS NO. 120, "TIRE SELECTION AND RIMS FOR MOTOR VEHICLES OTHER THAN PASSENGER CARS." THE PROBLEM WAS CAUSED BY A COMPUTER ERROR THAT RESULTED IN THE CERTIFICATION LABEL LISTING TIRE SIZE AND INFLATION PRESSURE INFORMATION THAT DIFFER FROM THE TIRE SIZE AND THE INFLATION PRESSURE INFORMATION FOR THE TIRES ON THE VEHICLE. IF THE VEHICLE OWNER OR SOMEONE SERVICING THE VEHICLE INFLATES THE TIRES ACCORDING TO THE PRESSURE SPECIFIED ON THE LABEL VERSUS THE APPROPRIATE PRESSURE FOR THE TIRES, THE TIRES COULD BE UNDER-INFLATED OR OVER-INFLATED DEPENDING ON THE TIRES MOUNTED ON THE VEHICLE.
Consequence & remedy
Consequence: IF THE TIRES ARE UNDER-INFLATED, IT COULD REDUCE THE TREAD LIFE OF THE TIRE, AND THE TIRE COULD DEGRADE TO A POINT OF ALLOWING SUDDEN AIR LOSS. IF THE TIRES ARE OVER-INFLATED, IT COULD REDUCE THE TREAD LIFE OF THE TIRE AND INCREASE SUSCEPTIBILITY TO ROAD HAZARD DAMAGE. IF SUDDEN AIR LOSS OR A ROAD HAZARD CAUSES DAMAGE TO A TIRE, CONTROL OF THE VEHICLE COULD BE ADVERSELY AFFECTED AND COULD RESULT IN A VEHICLE CRASH.
Remedy: OWNERS WILL BE PROVIDED WITH A NEW LABEL AND INSTALLATION INSTRUCTIONS. HOWEVER, A DEALER CAN INSTALL THE LABEL IF THE OWNER SO DESIRES. OWNER NOTIFICATION BEGAN MAY 31, 2001. OWNERS WHO DO NOT RECEIVE THE LABEL AND INSTALLATION INSTRUCTIONS WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.
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
2EA06016 · 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.
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.