2001 GMC Sierra 2500

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.

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.

Unknown

NHTSA ID

11536339

Incident

Aug 3, 2023

FUEL IS DUMPING INTO INJECTORS. 2001 GMC SIERRA 2500 DIESEL. ONLY HAS 135,000 MILES!! ENGINE BOGGS DOWN WHEN CLIMBING HILL, BRIDGE, OR TOWING.

NHTSA ID

11389800

Incident

Oct 10, 2020

Mileage

135,000 mi

I HAVE A 2001 GMC TRUCK THAT THE REAR FRAME HORN ON THE PASSENGER SIDE WERE THE FRAME IS WELDED ABOUT 6 INCHES FROM THAT POINT IT HAS A CRACK ALL THE WAY TO THE TOP OF THE FRAME RIGHT WERE THE BUMP STOP IS ON THE FRAME WITH ONLY ABOUT 1 INCH HOLDING THE FRAME TOGETHER AS OF RIGHT NOW THE REST OF THE FRAME LOOKED OK WHEN INSPECTED

NHTSA ID

11082271

Incident

Feb 9, 2018

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.

NHTSA ID

11081089

Incident

Mar 10, 2018

Mileage

200,000 mi

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

NHTSA ID

10930162

Incident

Oct 5, 2016

Mileage

98,000 mi

HAVING HEARD ABOUT MICHELIN RECALLS I CHECKED THE TIRES ON MY 2001 GMC SIERRA PICKUP. I HAVE MICHELIN LT245/75R16 120/116R XC LT4 TIRES WITH LESS THAN 20,000 MILES WEAR. TWO OF THEM ARE "CRUMBLING" OUT 1 1/2 INCH ABOVE THE RIM. YOU CAN SEE FIBERS IN THE HOLES. THERE ARE CRACKS EVERYWHERE ON ALL THE TIRES. THEY HAVE BEEN COVERED FROM THE SUN. GRANTED THE TIRES HAVE AGE BUT I HAVE NEVER SEEN "CRUMBLING" BEFORE.

NHTSA ID

10851257

Incident

Mar 10, 2016

Mileage

163,540 mi

TL* THE CONTACT OWNS A 2001 GMC 2500 HD. WHILE DRIVING APPROXIMATELY 35 MPH AND DEPRESSING THE BRAKE PEDAL, THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD AND FAILED TO STOP THE VEHICLE. THE CONTACT ENGAGED THE EMERGENCY BRAKE AND PLACED THE VEHICLE IN PARK. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO WAS DIAGNOSED THAT THE DISTRIBUTOR BRAKE BLOCK HAD EXCESSIVE RUST AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 180,000. THE VIN WAS UNAVAILABLE.

NHTSA ID

10824168

Incident

Jan 30, 2016

Mileage

180,000 mi

I UNDERSTAND GM HAD A RECALL ON THE BRAKE BOOSTER SYTEM AND ALSO A FEW YEARS BACK A RECALL ON REPLACING ALL THE FUEL INJECTORS ON THE DIESEL ENGINE ! I AM ORINGINAL OWNER AT THE SAME ADDRESS WHEN I PURCHASED THE VEHICLE NEW ! I MISSED THE RECALLS BECAUSE I NEVER WAS NOTIFIED ! ITS SAD TO BUY A GM PRODUCT AND THEY DON'T ALERT ME TO A RECALL ! WHAT'S UP WITH THIS?

NHTSA ID

10822490

Incident

Aug 1, 2010

This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.

This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.

This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.

Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected modules (with some exceptions). The updating of modules is completed in parallel instead of the technician needing to update one module at a time. This allows a more streamlined approach for dealers and customers.

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.

This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.