NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter19,300 miles · Jul 23, 2009
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STARTED THE IGNITION AND THE VEHICLE MISFIRED AND EXHIBITED EXTREMELY LOW RPMS. ON SEPARATE OCCASIONS, THE ENGINE STALLED AND HESITATED. THE FAILURES OCCURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER AND THEY STATED THAT THE CRANKSHAFT P…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STARTED THE IGNITION AND THE VEHICLE MISFIRED AND EXHIBITED EXTREMELY LOW RPMS. ON SEPARATE OCCASIONS, THE ENGINE STALLED AND HESITATED. THE FAILURES OCCURRED INTERMITTENTLY. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER AND THEY STATED THAT THE CRANKSHAFT POSITION SENSOR FAILED. THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING), ALTHOUGH THE FAILURES WERE IDENTICAL. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE MILEAGE WAS 19,300 AND THE CURRENT MILEAGE IS 19,325. THE CONSUMER STATED THE CODE READ A PROBLEM WITH THE CAMSHAFT POSITION SENSOR. UPDATED 08/14/09.*JB
NHTSA ODI #10278067
123,000 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
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
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
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
109,000 miles · Dec 24, 2008
Engine And Engine Cooling
2001 CHEVY HD 2500 8.1 CRANKSHAFT SENSOR FAILURE DEALER SAYS NOT COVERED ON RECALL. *TR
NHTSA ODI #10252732
51,009 miles · Nov 24, 2008
Engine And Engine Cooling
2001 SILVERADO HD 8.1L ENGINE 51,009 MILES. EXPERIENCING ISSUES ASSOCIATED WITH NHTSA ID # 07V521000. I HAVE HAD IT CHECKED AND THE SCANNER SHOWS A CRANKSHAFT POSITION SENSOR FAILURE. I TOOK IT TO THE DEALER AND WAS TOLD THAT THEY WILL NOT FIX IT DUE TO MY VIN NUMBER BEING OUTSIDE THE RECALLED GROUPS. EVEN THOUGH IT IS IN THE…
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2001 SILVERADO HD 8.1L ENGINE 51,009 MILES. EXPERIENCING ISSUES ASSOCIATED WITH NHTSA ID # 07V521000. I HAVE HAD IT CHECKED AND THE SCANNER SHOWS A CRANKSHAFT POSITION SENSOR FAILURE. I TOOK IT TO THE DEALER AND WAS TOLD THAT THEY WILL NOT FIX IT DUE TO MY VIN NUMBER BEING OUTSIDE THE RECALLED GROUPS. EVEN THOUGH IT IS IN THE DATE RANGE OF THE EFFECTED UNITS. I DID SOME RESEARCH AND FOUND THAT MY TRUCK HAS THE SAME EXACT PART NUMBER OF THE ITEM THAT IS FAILING. THIS HAS CAUSED ME TO ALMOST BE REAR ENDED 3 TIMES AND SEVERAL OTHER TIMES WHERE IT QUITS AT HIGHWAY SPEED OR IN AN INTERSECTION AND I LOOSE GOOD STEERING AND BRAKING CONTROL. THE LAST TIME (LAST SATURDAY) LEFT ME AND MY 2 CHILDREN (4 AND 7) WALKING IN A SNOW STORM WITH POOR VISIBILITY AND RISKING FREEZING TEMPS AND ALMOST GETTING HIT BY OTHER TRAFFIC. IT WILL USUALLY START AGAIN BUT THEN RUNS ROUGH BUT SOMETIMES I HAVE TO LET IT SIT FOR AN HOUR BEFORE IT WILL START. VIC CANEVER CHEVROLET IN FENTON MI IS THE DEALER THAT SAID THAT THEY WILL NOT HONOR THE RECALL DUE TO VIN NUMBER NOT IN THEIR SYSTEM AS A RECALLED UNIT AND THE GM CUSTOMER SERVICE HOTLINE WOULD NOT ASSIST ME EITHER. *TR
NHTSA ODI #10249707
980,000 miles · Oct 13, 2008
Engine And Engine Cooling
POSSIBLE EVENT. MY 2001 SILVERFISH 2500 HD(8.1 L) IS STALLING AND HARD TO START. MY INDEPENDENT MECHANIC BELIEVES THAT IT COULD BE THE CRANKSHAFT POSITION SENSOR THAT HAS A RECALL. I CONTACTED THE CHEVY FOLKS AND THEY SAID THAT MY VIN NUMBER IS OUT SIDE OF THE RECALL LIST FOR 2001 MODEL. THIS IS A REAL SAFETY PROBLEM WHEN TRU…
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POSSIBLE EVENT. MY 2001 SILVERFISH 2500 HD(8.1 L) IS STALLING AND HARD TO START. MY INDEPENDENT MECHANIC BELIEVES THAT IT COULD BE THE CRANKSHAFT POSITION SENSOR THAT HAS A RECALL. I CONTACTED THE CHEVY FOLKS AND THEY SAID THAT MY VIN NUMBER IS OUT SIDE OF THE RECALL LIST FOR 2001 MODEL. THIS IS A REAL SAFETY PROBLEM WHEN TRUCK STALLS. 2001 CHEVROLET SILVERADO RECALL ID FROM NHTSA: 07V521000. *TR
NHTSA ODI #10245266
62,000 miles · Sep 29, 2008
Engine And Engine Cooling
VEHICLE STALLS/STOPS RUNNING WITHOUT ANY WARNING. AT TIMES IT WILL RESTART BY ITSELF. OTHER TIMES VEHICLE HAS TO BE MANUALLY RESTARTED. THIS IS A MAJOR PROBLEM WHEN ON THE HIGHWAY OR IN TRAFFIC, ESPECIALLY IF YOU ARE TOWING A TRAILER ETC. HAD TO REPLACE CRANKSHAFT POSITION SENSOR TO CORRECT PROBLEM. *TR
NHTSA ODI #10243949
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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