IllustrationEXHAUST 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
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
What owners actually said
134 reportsON THE DURAMAX DIESEL, WHILE UNDER A LOAD (TOWING, FULL BED) FUEL LINES COLLAPSE CAUSING SEVERAL CHECK ENGINE LIGHTS AND VEHICLE TO GO INTO "LIMP" MODE. MUST RELEASE VACUUM IN FUEL SYSTEM (BY LOOSENING THE FUEL FILTER THEN RE-BLEEDING THE FUEL SYSTEM) IN ORDER FOR THE CODE TO GO OFF. HAPPENED SEVERAL TIMES, ONCE WHILE TOWING …
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ON THE DURAMAX DIESEL, WHILE UNDER A LOAD (TOWING, FULL BED) FUEL LINES COLLAPSE CAUSING SEVERAL CHECK ENGINE LIGHTS AND VEHICLE TO GO INTO "LIMP" MODE. MUST RELEASE VACUUM IN FUEL SYSTEM (BY LOOSENING THE FUEL FILTER THEN RE-BLEEDING THE FUEL SYSTEM) IN ORDER FOR THE CODE TO GO OFF. HAPPENED SEVERAL TIMES, ONCE WHILE TOWING UP HILL. IF THIS HAD CAUSED AN ACCIDENT, I WOULD HAVE BEEN A GM SHARE HOLDER. VEHICLE HAS STALLED OUT SEVERAL TIMES IN THE WINTER DUE TO A COMBINATION OF THE WINTER DIESEL AND THE VACUUM FUEL SYSTEM. ONCE WHILE ON AN ICY ROAD, ON MY WAY TO WORK AT 4AM. GM NEEDS TO RECALL THIS. *TR
I CONNECTED MY CAMPER TO THE TRUCK. PROCEEDED TOWARD THE STREET DRIVING ON THE DRIVEWAY. I APPLIED THE BRAKE AND FELT A THUMP AT MY FOOT THAT'S WAS APPLYING THE BRAKE. THE BRAKE PEDAL WENT SLOWLY TO THE FLOOR. I WAS ABLE TO STOP, LOOKED UNDER THE TRUCK AND NOTICED BRAKE FLUID FLOWING FROM UNDERNEATH THE TRUCK. APON INSPECTION MY…
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I CONNECTED MY CAMPER TO THE TRUCK. PROCEEDED TOWARD THE STREET DRIVING ON THE DRIVEWAY. I APPLIED THE BRAKE AND FELT A THUMP AT MY FOOT THAT'S WAS APPLYING THE BRAKE. THE BRAKE PEDAL WENT SLOWLY TO THE FLOOR. I WAS ABLE TO STOP, LOOKED UNDER THE TRUCK AND NOTICED BRAKE FLUID FLOWING FROM UNDERNEATH THE TRUCK. APON INSPECTION MY BRAKE LINES WERE TOTALLY RUSTED. THE TRUCK IS IN THE REPAIR FACILITY AS I WRITE THE COMPLAINT. THE TRUCK BODY IS IN GREAT SHAPE EXCEPT FOR THE BRAKE LINES. BETTER REGULATIONS NEED TO BE MET REGARDING BRAKE LINE. PLEASE HELP. *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
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 65 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS ABLE TO BE RESTARTED HOWEVER, THE FAILURE WAS RECURRING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE FUEL PUMP AND FILTER NEEDED TO BE REPLACED…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 65 MPH, THE VEHICLE STALLED WITHOUT WARNING. THE VEHICLE WAS ABLE TO BE RESTARTED HOWEVER, THE FAILURE WAS RECURRING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE FUEL PUMP AND FILTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 58,000.
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHEN TRAVELING UNDER 5 MPH, THE CONTACT STATED THAT THE PEDAL BEGAN TO PULSATE. THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND THE VEHICLE FAILED TO STOP IMMEDIATELY. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTUR…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHEN TRAVELING UNDER 5 MPH, THE CONTACT STATED THAT THE PEDAL BEGAN TO PULSATE. THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND THE VEHICLE FAILED TO STOP IMMEDIATELY. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 68,000.
WE HAD DRIVEN ABOUT 90 MILES FROM OUR MAIN HOUSE TO OUR LAKE HOUSE ON FRIDAY NIGHT-BRAKES WERE FINE. SATURDAY MORNING WE BACKED THE SIERRA UP AND HOOKED UP THE BOAT TO THE HITCH. AFTER HOOKING UP THE BOAT WHILE WE WERE PULLING OUT OF THE DRIVEWAY THE BRAKE PEDAL WENT TO THE FLOOR. WE DROPPED THE BOAT AND DROVE THE SIERRA A FE…
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WE HAD DRIVEN ABOUT 90 MILES FROM OUR MAIN HOUSE TO OUR LAKE HOUSE ON FRIDAY NIGHT-BRAKES WERE FINE. SATURDAY MORNING WE BACKED THE SIERRA UP AND HOOKED UP THE BOAT TO THE HITCH. AFTER HOOKING UP THE BOAT WHILE WE WERE PULLING OUT OF THE DRIVEWAY THE BRAKE PEDAL WENT TO THE FLOOR. WE DROPPED THE BOAT AND DROVE THE SIERRA A FEW MILES TO THE STORE. WHILE AT THE STORE WE NOTICED A LEAK ABOVE THE GAS TANK. THE LEAK WAS BRAKE FLUID AND THE SIERRA TOOK AN ENTIRE BOTTLE OF BRAKE FLUID. WE DROVE IT THE FEW MILES BACK TO THE HOUSE AND GOT THE TRUCK TOWED HOME THE NEXT DAY. WHEN THE GAS TANK WAS DROPPED WE NOTICED RUST SO BAD ON THE FRAME THAT A SCREWDRIVER WENT THRU THE FRAME. THE FRAME COULD HAVE BUSTED APART RIGHT BEHIND THE CAB OF THE TRUCK. WE WERE EXTREMELY LUCKY THAT THERE WERE NO INJURIES. *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
I PARKED MY VEHICLE AND UPON EXITING OBSERVED FLUID DRIPS ON THE PAVEMENT. I TOUCHED AND SMELLED THE FLUID AND DETERMINED IT TO BE BRAKE FLUID. I THEN OBSERVED FLUID DRIPPING FROM BENEATH THE DRIVERS SIDE PASSENGER COMPARTMENT. I IMMEDIATELY CHECKED THE BRAKE FLUID RES. AND OBSERVED IT TO BE BELOW THE 1/2 POINT. I WAS APPROXIMAT…
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I PARKED MY VEHICLE AND UPON EXITING OBSERVED FLUID DRIPS ON THE PAVEMENT. I TOUCHED AND SMELLED THE FLUID AND DETERMINED IT TO BE BRAKE FLUID. I THEN OBSERVED FLUID DRIPPING FROM BENEATH THE DRIVERS SIDE PASSENGER COMPARTMENT. I IMMEDIATELY CHECKED THE BRAKE FLUID RES. AND OBSERVED IT TO BE BELOW THE 1/2 POINT. I WAS APPROXIMATELY 4 MILES FROM MY HOME AND DECIDED TO TAKE THE BACK ROAD WHICH REQUIRED LESS BRAKING. THE FLUID WAS STILL LEAKING UPON MY ARRIVAL HOME. I SHOULD NOTE THERE WAS NO FLUID LEAKING PRIOR TO DEPARTING MY RESIDENCE. I DID NOTICE THE PEDAL TRAVEL TO HAVE INCREASED AND THE FEEL TO BE SLIGHTLY SPONGY AS I DROVE DOWN A STEEP GRADE REQUIRING SIGNIFICANT BRAKING TO MAINTAIN THE 35 MPH LIMIT INTO HAVRE DE GRACE. THE VEHICLE (2001 GMC 2500HD) IS NOT DRIVEN MUCH AND MOSTLY FOR LOCAL (<15 MILES) TRAVEL. THE FRONT ROTORS AND CALIPERS HAVE BEEN REPLACED AND THE LINES BLED APPROXIMATELY 2 MONTHS AGO. THERE IS RUST EVIDENT ON THE BRAKE LINES. I MIGHT ARGUE THAT DUE TO THE VEHICLE AGE THIS IS TO BE EXPECTED; HOWEVER, THE EXTREMELY LOW MILEAGE IS EQUIVALENT TO APPROXIMATELY THREE (3) YEARS WORTH OF DRIVING. HAVING OWNED MANY VEHICLES, THIS IS THE FIRST TO HAVE HAD SUCH A PROBLEM. I NOW HAVE THE UNSCHEDULED EXPENSE OF REPLACING THE BRAKE LINES. I AM LUCKY NOT TO HAVE BEEN FURTHER FROM HOME WHERE I MIGHT HAVE EXPERIENCED TOTAL BRAKE FAILURE POSSIBLY CAUSING A CRASH.*JB
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE VEHICLE SUDDENLY JERKED TO THE LEFT THEN SPUN AROUND 180 DEGREES BEFORE CRASHING INTO A MEDIAN. THE CONTACT SUSTAINED A DISLOCATED HIP. THE VEHICLE WAS PERSONALLY INSPECTED BY THE CONTACT, WHO DETERMINED THAT THE DRIVER'S SIDE FRONT…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHILE DRIVING 55 MPH, THE VEHICLE SUDDENLY JERKED TO THE LEFT THEN SPUN AROUND 180 DEGREES BEFORE CRASHING INTO A MEDIAN. THE CONTACT SUSTAINED A DISLOCATED HIP. THE VEHICLE WAS PERSONALLY INSPECTED BY THE CONTACT, WHO DETERMINED THAT THE DRIVER'S SIDE FRONT TIE ROD HAD FAILED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS APPROXIMATELY 159,350.
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.