NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports123,000 miles · Jul 21, 2009
Engine And Engine Cooling
PICKUP TRUCK STALLS AT HIGH SPEED. ENGINE DIES, BRAKES AND POWER STEERING LOSES COMPLETE POWER. THIS IS A HEAVY DUTY TRUCK (8.1L ENGINE) AND I WAS TOWING A TRAILER AND LOADED TRACTOR DOWN A STEEP HILL. LUCKY TO COME OUT ALIVE. DEALER DIAGNOSED AS FAULTY CRANKCASE POSITION SENSOR. THIS APPARENTLY IS A KNOWN PROBLEM WITH THIS TRUC…
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PICKUP TRUCK STALLS AT HIGH SPEED. ENGINE DIES, BRAKES AND POWER STEERING LOSES COMPLETE POWER. THIS IS A HEAVY DUTY TRUCK (8.1L ENGINE) AND I WAS TOWING A TRAILER AND LOADED TRACTOR DOWN A STEEP HILL. LUCKY TO COME OUT ALIVE. DEALER DIAGNOSED AS FAULTY CRANKCASE POSITION SENSOR. THIS APPARENTLY IS A KNOWN PROBLEM WITH THIS TRUCK/ENGINE (NHTSA CAMPAIGN ID 07V521000) BUT APPARENTLY MY VIN IS NOT PART OF RECALL. GOT NEWS FOR NHTSA & GM: THE PROBLEM HAS NOT BEEN FIXED AND THE EXTREMELY DANGEROUS FAILURE MODE STILL EXISTS. A TRUCK WITH AN 8.1L ENGINE IS MORE OFTEN THAN NOT TOWING SOMETHING HEAVY (HORSES, TRAILER, BOAT, TRACTOR, ETC). STALLING AT ANY TIME AND ANYWHERE MAKES FOR AN EXTREMELY DANGEROUS CONDITION. DO A GOOGLE SEARCH ON THE CAMPAIGN ID AND YOU WILL SEE THAT THIS IS NOT AN ISOLATED INCIDENT. EXTEND THE RECALL TO LATER VIN #'S AND SAVE SOME LIVES. *TR
NHTSA ODI #10277642
107,100 miles · Jun 26, 2009
Tires
TRAVELING 70 MILES AN HOUR ON I 95 NORTH. TIRE BLEW,TAKING PLASTIC COWLING FROM FRONT RIGHT FENDER. TIRE BLEW INTO A GREAT MANY PIECES. REPLACED WITH [COOPER TIRE] TIRE SIZE,LT245-75R16. ALSO! ! ! ! ! 3 WEEKS LATER,TRAVELING AT 35 MPH, THE FRONT LEFT TIRE BLEW, LT245-75R16. SIDEWALL BLEW OUT,REPLACED WITH A COOPER TIRE. JUST …
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TRAVELING 70 MILES AN HOUR ON I 95 NORTH. TIRE BLEW,TAKING PLASTIC COWLING FROM FRONT RIGHT FENDER. TIRE BLEW INTO A GREAT MANY PIECES. REPLACED WITH [COOPER TIRE] TIRE SIZE,LT245-75R16. ALSO! ! ! ! ! 3 WEEKS LATER,TRAVELING AT 35 MPH, THE FRONT LEFT TIRE BLEW, LT245-75R16. SIDEWALL BLEW OUT,REPLACED WITH A COOPER TIRE. JUST ABOUT CAUSED AN ACCIDENT. FIRST TIRE IS NOT AVAILABLE,2ND ONE I HAVE. *TR
NHTSA ODI #10275012
70,000 miles · May 7, 2009
Engine And Engine Cooling
CRANKSHAFT POSITION SENSOR PRODUCT SAFETY RECALL #06083--2001 CHEVY SILVERADO 8.1L V8 ENGINE. I HAVE THE EXACT ENGINE AND TRUCK, BUT MY VIN IS NOT INCLUDED IN THE RECALL. I HAVE A DEFECTIVE CRANKSHAFT POSITION SENSOR THAT CAUSES THE TRUCK TO STALL OCCASIONALLY--EVEN AT HIGHWAY SPEEDS AND WHILE TOWING A LARGE TRAILER. CHEV…
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CRANKSHAFT POSITION SENSOR PRODUCT SAFETY RECALL #06083--2001 CHEVY SILVERADO 8.1L V8 ENGINE. I HAVE THE EXACT ENGINE AND TRUCK, BUT MY VIN IS NOT INCLUDED IN THE RECALL. I HAVE A DEFECTIVE CRANKSHAFT POSITION SENSOR THAT CAUSES THE TRUCK TO STALL OCCASIONALLY--EVEN AT HIGHWAY SPEEDS AND WHILE TOWING A LARGE TRAILER. CHEVROLET REFUSES TO COVER THE REPAIR UNDER THE RECALL. *TR
NHTSA ODI #10267941
95,000 miles · Apr 15, 2009
Service Brakes, Hydraulic
ANTI-LOCK ON BRAKES FAIL GOING AT SLOW SPEED AND BRAKES DO NOT WORK. THE DEALER SAID TO SAND THE RUST OFF THE SENSORS, AND WOULD NOT CORRECT THE PROBLEM. *TR
NHTSA ODI #10265415
76,000 miles · Mar 18, 2009
Suspension
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE HAD JUST BEEN INSPECTED BY THE DEALER. WHILE DRIVING 55 MPH, THE CONTACT NOTICED THAT THE FRONT WHEELS BEGAN TO DETACH FROM THE VEHICLE DUE TO THE HUB AND WHEEL BEARING FAILING. THE DEALER STATED THAT NOTHING COULD BE DONE. THE CONTACT DOES NOT FEEL SAFE DRI…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE HAD JUST BEEN INSPECTED BY THE DEALER. WHILE DRIVING 55 MPH, THE CONTACT NOTICED THAT THE FRONT WHEELS BEGAN TO DETACH FROM THE VEHICLE DUE TO THE HUB AND WHEEL BEARING FAILING. THE DEALER STATED THAT NOTHING COULD BE DONE. THE CONTACT DOES NOT FEEL SAFE DRIVING THE VEHICLE BECAUSE HE TRAVELS DOWN A STEEP 600 FOOT HILL AND FEARS A CRASH COULD OCCUR. THE CURRENT MILEAGE WAS 100,000 AND FAILURE MILEAGE WAS 76,000.
NHTSA ODI #10262256
82,000 miles · Mar 18, 2009
Tires
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE HAS MASTERCRAFT COURSER A/T 2 TIRES, SIZE LT265/75R16. WHILE DRIVING 55 MPH, ON MARCH, 8 2009, THE REAR DRIVER'S SIDE TIRE BLEW OUT. THE FAILURE DAMAGED THE FRONT DRIVER'S SIDE FENDER AND THE AIR LIFT. THE DRIVER NOTICED THAT THE REAR DRIVER'S SIDE TIRE THRE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE HAS MASTERCRAFT COURSER A/T 2 TIRES, SIZE LT265/75R16. WHILE DRIVING 55 MPH, ON MARCH, 8 2009, THE REAR DRIVER'S SIDE TIRE BLEW OUT. THE FAILURE DAMAGED THE FRONT DRIVER'S SIDE FENDER AND THE AIR LIFT. THE DRIVER NOTICED THAT THE REAR DRIVER'S SIDE TIRE THREAD WAS SEPARATED. THE DOT NUMBER WAS UNKNOWN. THE CURRENT AND FAILURE MILEAGES WERE 82,000.
NHTSA ODI #10262244
Mileage unknown · Feb 20, 2009
Engine And Engine Cooling
MY TRUCK BURNS OIL ENTIRELY TOO FAST. I JUST CHANGED MY OIL LESS THAN A WEEK AGO AND MY OIL LEVEL LIGHT CAME ON. IT WAS PROBABLY 2 QUARTS LOW AND I ONLY PUT ABOUT 150 MILES ON IT. THIS IS UNACCEPTABLE. I DO HAVE A LOT OF MILES ON MY TRUCK BUT EVERYONE TELLS ME THIS IS NORMAL. THIS HAS BEEN GOING ON SINCE I PURCHASED THE VEH…
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MY TRUCK BURNS OIL ENTIRELY TOO FAST. I JUST CHANGED MY OIL LESS THAN A WEEK AGO AND MY OIL LEVEL LIGHT CAME ON. IT WAS PROBABLY 2 QUARTS LOW AND I ONLY PUT ABOUT 150 MILES ON IT. THIS IS UNACCEPTABLE. I DO HAVE A LOT OF MILES ON MY TRUCK BUT EVERYONE TELLS ME THIS IS NORMAL. THIS HAS BEEN GOING ON SINCE I PURCHASED THE VEHICLE. I DON'T KNOW WHAT ELSE TO DO. *TR
NHTSA ODI #10259498
2,008 miles · Feb 4, 2009
Engine And Engine Cooling
I HAVE A 2001 CHEVROLET SILVERADO 2500HD WITH THE 8.1L ENGINE WITH AN INTERMITTENT STALLING PROBLEM AS DESCRIBED BY OTHERS. THE ENGINE WILL STALL AT VARIOUS TIMES, WHILE DRIVING, SITTING AT STOP LIGHTS, ETC. THE PROBLEM HAS BEEN AN ISSUE FOR SEVERAL YEARS. I NOTED THE RECALL ISSUED BY GM, BUT MY VEHICLES VIN WAS 5000 PAST THE…
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I HAVE A 2001 CHEVROLET SILVERADO 2500HD WITH THE 8.1L ENGINE WITH AN INTERMITTENT STALLING PROBLEM AS DESCRIBED BY OTHERS. THE ENGINE WILL STALL AT VARIOUS TIMES, WHILE DRIVING, SITTING AT STOP LIGHTS, ETC. THE PROBLEM HAS BEEN AN ISSUE FOR SEVERAL YEARS. I NOTED THE RECALL ISSUED BY GM, BUT MY VEHICLES VIN WAS 5000 PAST THE SCOPE OF THE RECALL. THE TRUCK WAS BUILT IN NOVEMBER 2000 AND DELIVERED IN MID-DECEMBER 2000. I PAID TO HAVE THE CRANKCASE SENSOR REPAIRED AND IT APPEARS TO HAVE RESOLVED THE PROBLEM. THE PICKUP HAS JUST OVER 50,000 MILES. *TR
NHTSA ODI #10257398
Mileage unknown · Jan 9, 2009
Service Brakes, Hydraulic
BOTH ANTILOCK SPEED SENSORS WENT FAULTY AFTER 3.5 YEARS AND WERE REPLACED BY MFG. NOW 7 YEARS AND 70K MILES BOTH ARE FAULTY AGAIN AND GM SAYS YOUR PROBLEM. EVEN THOUGH A RECALL IS IN PLACE MY VIN # IS NOT INCLUDED??? $900.00 I WILL NEED TO PAY. *TR
NHTSA ODI #10254380
100,000 miles · Jan 6, 2009
Engine And Engine Cooling
SAME PROBLEM AS EA06016. MY 2001 CHEVROLET SILVERADO 2500HD WITH THE 8.1L GAS ENGINE EXPERIENCED THE INTERMITTENT STALLING DESCRIBED IN EA06016. IT WAS BUILT JUST AFTER THE RECALL DATE SO GM WOULD NOT DO ANYTHING OTHER THAN OFFER TO CHARGE ME FOR THE REPAIR. THE MAIN SAFETY PROBLEM IS THE SOFTWARE BUG THAT DOESN'T RECORD THE B…
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SAME PROBLEM AS EA06016. MY 2001 CHEVROLET SILVERADO 2500HD WITH THE 8.1L GAS ENGINE EXPERIENCED THE INTERMITTENT STALLING DESCRIBED IN EA06016. IT WAS BUILT JUST AFTER THE RECALL DATE SO GM WOULD NOT DO ANYTHING OTHER THAN OFFER TO CHARGE ME FOR THE REPAIR. THE MAIN SAFETY PROBLEM IS THE SOFTWARE BUG THAT DOESN'T RECORD THE BAD CRANKSHAFT POSITION SENSOR. THE FIRST 20 OR SO INCIDENTS WERE ANNOYING. WHEN THE TRUCK STARTED SHUTTING DOWN WHILE GOING DOWN A 10% GRADE ON A TWISTING MOUNTAIN ROAD IT GOT SCARY. LUCKILY I WASN'T PULLING THE 15000 POUND TRAILER THAT I OFTEN PULL. THE PROBLEM ONLY OCCURS AT ONE PARTICULAR ENGINE TEMPERATURE AND IT DOESN'T SET A DTC. IT TOOK ME THREE MONTHS OF SEARCHING THE WEB TO FIND THE PROBLEM. GM WAS OF NO HELP DIAGNOSING OR FIXING THE PROBLEM EVEN WITH THE RECALL ON THE IDENTICAL TRUCKS THAT WERE BUILT JUST PRIOR TO MINE. MY TRUCK HAD THE POSITION SENSOR REPLACED IN 2002 WITH THE SAME DESIGN PART AS THE ORIGINAL. THE REPLACED PART LASTED TILL 2008. SEARCHING THE WEB SHOWS THAT MOST OF THE 2000-2002 8.1L ENGINES DEVELOP THIS PROBLEM AT SOME POINT. GM MAKES A LOT OF MONEY SELLING UNNEEDED PARTS AND CHARGING $85 TO READ NON-EXISTENT DTCS. AN 8.1L ENGINE IS MEANT TO PULL LARGE LOADS. WHEN THE ENGINE DIES THE TRUCK LOSES POWER STEERING AND BRAKES. MY TRUCK DIED AT LEAST 50 TIMES BEFORE I WAS ABLE TO FIX IT. I WOULDN'T LET MY WIFE DRIVE IT BECAUSE SHE WOULD MOST LIKELY HAVE KILLED SOMEONE WITH IT. IT DIED GOING AROUND THE SAME CORNER 5 DAYS IN A ROW. TURNING A 7000 POUND TRUCK WITHOUT POWER STEERING IS A BIT OF A CHALLENGE. I AM A TEST ENGINEER WITH 30 YEARS OF EXPERIENCE. WITHOUT THE HELP OF THE INTERNET THIS PROBLEM IS NEARLY IMPOSSIBLE TO DIAGNOSE. GM IS OF NO HELP. THE PROBLEM SETS NO CODES AND THE VEHICLE RUNS FINE IF IT WARMS UP OR COOLS DOWN FROM THE ONE TEMPERATURE. I REPLACED MY SENSOR AND THE VEHICLE NOW RUNS FINE. THERE ARE THOUSANDS OF MORE VEHICLES OUT THERE WITH THE SAME PROBLEM. HOPEFULLY YOU WILL RE-OPEN YOUR INVESTIGATION. *TR
NHTSA ODI #10253922
NHTSA investigations
3EA06016 · Crank Position Sensor Failure - Stall
Opened Sep 14, 2006 · Closed Nov 9, 2007
Status: closed (inferred from source dates) · Engine And Engine Cooling; Engine And Engine Cooling:engine
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
Additional source detail variants (2)
Engine And Engine Cooling:engine
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
Engine And Engine Cooling
IN A LETTER DATED NOVEMBER 7, 2007, GENERAL MOTORS (GM) REPORTED TO THE OFFICE OF DEFECTS INVESTIGATION (ODI) THAT IT WILL CONDUCT A SAFETY RECALL (07V-521) TO REPLACE THE CRANK POSITION SENSOR (CKP) IN APPROXIMATELY 12,000 MODEL YEAR (MY) 2001 CHEVROLET SILVERADO AND GMC SIERRA VEHICLES EQUIPPED WITH 8.1 LITER ENGINES MANUFACTURED ON OR BEFORE NOVEMBER 15, 2000.ACCORDING TO GM, THE CKP CAN FAIL INTERMITTENTLY OR PERMANENTLY.A PERMANENT CKP FAILURE WOULD RESULT IN AN ENGINE STALL WITHOUT RESTART.AN INTERMITTENT CKP FAILURE COULD CAUSE THE SERVICE ENGINE SOON LIGHT TO ILLUMINATE, THE VEHICLE TO RUN ROUGH OR THE ENGINE TO STALL BUT ALLOWS RESTART.AS A REMEDY, AN IMPROVED CKP WILL BE INSTALLED IN THE SUBJECT VEHICLES.THE RECALL CAMPAIGN WILL START IN DECEMBER 2007. DURING THE PRELIMINARY EVALUATION (PE06-016), AND THIS EA INVESTIGATION, GM AND ODI INDEPENDENTLY CONDUCTED DETAILED REVIEWS OF CERTAIN FIELD DATA TO UNDERSTAND THE NATURE AND RATE OF SUBJECT VEHICLE STALLING DUE TO CKP FAILURES.GM AND ODI REVIEWED GM'S WARRANTY CLAIMS FOR THE CKP WITH THE OBJECTIVE OF ASCERTAINING AN ESTIMATE OF THOSE CLAIMS REPRESENTING AN ENGINE STALL WHILE DRIVING.THE CKP WARRANTY CLAIMS WITHOUT VERBATIM TEXT WERE THE LARGEST SEGMENT OF WARRANTY CLAIMS.USING THOSE CLAIMS, GM SURVEYED VEHICLE OWNERS TO GATHER ADDITIONAL INFORMATION TO DETERMINE IF THE CLAIM WAS ASSOCIATED WITH A STALL WHILE DRIVING EVENT.BASED ON THE SURVEY, GM ESTIMATED THAT APPROXIMATELY 49% OF ALL WARRANTY REPAIRS FOR THE CKP INVOLVED A STALL WHILE DRIVING.ODI?S REVIEW OF GM'S SURVEY DATA PRODUCED A HIGHER ESTIMATE (71%) FOR STALL WHILE DRIVING.GM FURTHER ESTIMATED THE RATE OF STALL WHILE DRIVING FOR THE SUBJECT VEHICLES OVER TIME.IT ESTIMATED STALLING WHILE DRIVING RATES OF 1.6%, 4.6% AND 8.9% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY.ODI'S REVIEW OF THE GM'S SURVEY DATA FINDS HIGHER ESTIMATED STALL WHILE DRIVING RATES OF 2.2%, 6.8% AND 13% AT 1, 3 AND 6 YEARS IN SERVICE RESPECTIVELY. ODI ALSO CONDUCTED A SURVEY OF VEHICLE OWNERS USING CONSUMER COMPLAINTS REPORTED TO BOTH ODI AND GM.THE OBJECTIVE WAS TO ASCERTAIN THE POTENTIAL SAFETY CONSEQUENCES OF AN ENGINE STALL DUE TO THE ALLEGED DEFECT.WITH RESPECT TO THE ABILITY TO RESTART THE VEHICLE AFTER A STALL, 11% REPORTED IMMEDIATE RESTART, 69% REPORTED DELAYED RESTART AND 20% REPORTED NO RESTART.OVER HALF NOTED AT LEAST ONE ENGINE STALL INCIDENT AT SPEEDS IN EXCESS OF 40MPH. ABOUT ONE-THIRD NOTED THE VEHICLE WAS STRANDED EITHER PARTIALLY OR FULLY IN A LANE OF TRAFFIC AFTER THE ENGINE STALL.ALL OF THE CONSUMERS SURVEYED NOTED MULTIPLE STALLING EVENTS PRIOR TO PROPER DIAGNOSIS AND REPLACEMENT OF THE CKP.BASED ON GM'S DECISION TO CONDUCT A SAFETY RECALL, THIS INVESTIGATION IS CLOSED.
EA04012 · Hydraulic Pump Failres
Opened Apr 30, 2004 · Closed Feb 28, 2005
Status: closed (inferred from source dates) · Service Brakes, Hydraulic:power Assist; Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Additional source detail variants (2)
Service Brakes, Hydraulic:power Assist
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
PE04004 · Hydraulic Pump Shaft Failures
Opened Jan 8, 2004 · Closed Apr 30, 2004
Status: closed (inferred from source dates) · Service Brakes, Hydraulic; Service Brakes, Hydraulic:power Assist; Service Brakes, Hydraulic:power Assist:hydraulic; Steering:hydraulic Power Assist System; Steering:hydraulic Power Assist:pump
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Additional source detail variants (5)
Service Brakes, Hydraulic
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Service Brakes, Hydraulic:power Assist
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Service Brakes, Hydraulic:power Assist:hydraulic
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Steering:hydraulic Power Assist:pump
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
Steering:hydraulic Power Assist System
THE PRELIMINARY EVAULATION IS BEING UPGRADED.DURING THE EA ODI WILL LIMITITS INVESTIGATION TO ONLY THOSE VEHICLES EQUIPPED WITH A HYDRO-BOOST SYSTEM, WHICH PROVIDES POWER ASSIST TO THE BRAKING AND STEERING SYTEMS.VACCUUM BRAKE BOOSTER VEHICLES ARE EXCLUDED.ODI HASEXPANDED THE SCOPE OF THE EA TO INCLUDE MODEL YEARS2003 AND 2004, ASDURING THE PE, ODI LEARNED THAT THE HYDROBOAST PUMPS WERE MODIFIED IN FEBRAURY 2004.THEREFORE,ODI HAS EXPANDED THE SCOPE TO INCLUDE THE ADDITIONAL MODEL YEARS.ODI'S IS CONCERNED BECAUSE THISISA SUDDEN FAILURE THAT AFFECTS TWO CRITICAL SYSTEMS OF THE VEHICLE, BRAKES AND STEERING, AT THE SAME TIME.THE ABILITY OF THE OPERATOR TO HANDLE THE DUAL FAILURES IS A CONCERN. FURTHER, THESE VEHICLES TEND TO BE WORK VEHICLES, WITH SOME OVER 10,000 POUNDS GVWR AND MANY EQUIPPED TO PULL LARGE TRAILERS.DUAL FAILURES OF HEAVILY LOADED VEHICLES AND VEHICLES PULLING TRAILERS FURTHER INCREASES THE SAFETY RISK.ODI PLANS TO CONDUCT TESTING TO QUANTIFY THE BRAKING AND STEERING PERFORMANCE DEGRADATION AND THE IMPACT ON SAFE VEHICLE CONTROL, WHEN A HYDROBOAST PUMP FAILS.
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