NHTSA owner reports · September 18, 2026 snapshot.
Engine And Engine Cooling complaints
62 reportsClear category filter50,000 miles · Aug 3, 2010
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 40-45 MPH, THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO RESTART THE VEHICLE AS IT RESUMED NORMAL OPERATION. THE DEALER REPLACED THE BATTERY BUT TO NO AVAIL. THE CONTACT STATED THE FAILURE WOULD ONLY OCCUR IN DRY WEATHER CONDITIONS. THE V…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 40-45 MPH, THE VEHICLE STALLED WITHOUT WARNING. HE WAS ABLE TO RESTART THE VEHICLE AS IT RESUMED NORMAL OPERATION. THE DEALER REPLACED THE BATTERY BUT TO NO AVAIL. THE CONTACT STATED THE FAILURE WOULD ONLY OCCUR IN DRY WEATHER CONDITIONS. THE VEHICLE WAS TAKEN TO THE DEALER SEVERAL TIMES BUT THE FAILURE PERSISTED. MOST RECENTLY, THE FAILURE RECURRED AND THE VEHICLE INDEPENDENTLY RESTARTED. THE DEALER ADVISED THAT THE CRANK SHAFT WOULD NEED TO BE REPLACED TO CORRECT THE FAILURE. THE VEHICLE WAS LEFT WITH THE DEALER WHERE THE CONTACT WAS AWAITING REPAIRS. THE CONTACT REFERENCED NHTSA CAMPAIGN ID NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) BUT WAS UNABLE TO CONFIRM IF HIS VIN WAS INCLUDED IN THE RECALL. THE FAILURE MILEAGE WAS 50,000 AND THE CURRENT MILEAGE WAS 56,000.
NHTSA ODI #10347028
56,000 miles · Jul 20, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING 65 MPH, THE VEHICLE STALLED AND THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT STATED THAT AFTER 10 TO 15 SECONDS THE VEHICLE WOULD START AND PERFORM AS IF THE FAILURE NEVER OCCURRED. THE VEHICLE ALSO STALLED AT A COMPLETE STOP AND …
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING 65 MPH, THE VEHICLE STALLED AND THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT STATED THAT AFTER 10 TO 15 SECONDS THE VEHICLE WOULD START AND PERFORM AS IF THE FAILURE NEVER OCCURRED. THE VEHICLE ALSO STALLED AT A COMPLETE STOP AND AT TIMES THE VEHICLE FAILED TO RESTART. THE DEALER WAS CONTACTED AND STATED THAT HIS VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER: 07V521000, ENGINE AND ENGINE COOLING. THE FAILURE WAS DIAGNOSED BY A MECHANIC STATING THAT IT WAS THE CRANKSHAFT POSITION SENSOR THAT WAS FAULTY. NO REPAIRS WERE MADE WHEN THE COMPLAINT WAS FILED. THE FAILURE MILEAGE WAS 56000 AND THE CURRENT MILEAGE WAS 61900.
NHTSA ODI #10344210
92,000 miles · Apr 27, 2010
Engine And Engine Cooling
THE CONTACT OWNS A 2001 CHEVROLET 2500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 40MPH THE VEHICLE STALLED. THE FAILURE HAS OCCURRED APPROXIMATELY 15 TIMES. NO LIGHTS WERE ILLUMINATED DURING ANY OF THE FAILURES. THE VEHICLE WILL START WHEN PUT IN PARK AND RESTARTED. THE VEHICLE WAS TAKEN TO A GM DEALER AND WAS IN…
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THE CONTACT OWNS A 2001 CHEVROLET 2500. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 40MPH THE VEHICLE STALLED. THE FAILURE HAS OCCURRED APPROXIMATELY 15 TIMES. NO LIGHTS WERE ILLUMINATED DURING ANY OF THE FAILURES. THE VEHICLE WILL START WHEN PUT IN PARK AND RESTARTED. THE VEHICLE WAS TAKEN TO A GM DEALER AND WAS INFORMED THAT A RECALL WAS IN EFFECT, NHTSA CAMPAIGN ID NUMBER 07V521000, BUT THE OWNERS VIN IS NOT INCLUDED. THE VEHICLE HAS BEEN REPAIRED AT THE OWNERS EXPENSE. THE FAILURE MILEAGE WAS APPROXIMATELY 92,000. THE CURRENT MILEAGE IS 95,500. RD
NHTSA ODI #10327768
52,000 miles · Apr 8, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SUDDENLY STALLED WITHOUT WARNING. ON THE THIRD ATTEMPT, THE VEHICLE RESTARTED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS WHETHER THE VEHICLE WAS IN MOTION OR NOT. AN AUTHORIZED DEALER INFORMED HIM THAT THE PROBLEM COULD NOT BE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING APPROXIMATELY 40 MPH, THE VEHICLE SUDDENLY STALLED WITHOUT WARNING. ON THE THIRD ATTEMPT, THE VEHICLE RESTARTED. THE FAILURE OCCURRED ON NUMEROUS OCCASIONS WHETHER THE VEHICLE WAS IN MOTION OR NOT. AN AUTHORIZED DEALER INFORMED HIM THAT THE PROBLEM COULD NOT BE DIAGNOSED WITHOUT AN INDICATOR LIGHT BEING ILLUMINATED. THE VEHICLE WAS TAKEN TO SEVERAL INDEPENDENT MECHANICS BUT IT WAS VERIFIED THAT NO DIAGNOSIS COULD BE GIVEN WITHOUT AN INDICATOR LIGHT. THE CURRENT MILEAGE IS APPROXIMATELY 81,000. THE FAILURE MILEAGE WAS APPROXIMATELY 52,000. UPDATED EVOQ 11/02/10
NHTSA ODI #10324458
75,000 miles · Mar 23, 2010
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING AT APPROXIMATE SPEEDS OF 50-60 MPH ON NORMAL ROAD CONDITIONS, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO RESTART THE VEHICLE WITHIN A FEW MOMENTS AND IT WAS TAKEN TO AN AUTHORIZED DEALER FOR FURTHER INSPECTION. THE DEALER REPLACED THE CRANKSHAF…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500HD. WHILE DRIVING AT APPROXIMATE SPEEDS OF 50-60 MPH ON NORMAL ROAD CONDITIONS, THE ENGINE STALLED WITHOUT WARNING. THE CONTACT WAS ABLE TO RESTART THE VEHICLE WITHIN A FEW MOMENTS AND IT WAS TAKEN TO AN AUTHORIZED DEALER FOR FURTHER INSPECTION. THE DEALER REPLACED THE CRANKSHAFT POSITION SENSOR AT THE OWNERS EXPENSE. ALTHOUGH THERE WAS A RECALL ON HIS MODEL VEHICLE, THERE WERE NO RECALLS FOR HIS SPECIFIC YEAR (NHTSA CAMPAIGN ID NUMBER 07V521000: ENGINE AND ENGINE COOLING). THE CONTACT CONFIRMED THAT THE FAILURE HE EXPERIENCED WAS IDENTICAL TO THE FAILURES AS DESCRIBED IN THE RECALL CAMPAIGN. HE STATED THAT THE FAILURE WOULD OCCUR INTERMITTENTLY. THE FAILURE MILEAGE WAS 75,000. UPDATED 05/11/10.*LJ UPDATED 06/25/10*LJ UPDATED 08/30/10*JB
NHTSA ODI #10321552
52,590 miles · Sep 27, 2009
Engine And Engine Cooling
THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIATELY RESTART. AFTER A MINUTE OR TWO THE ENGINE HAS RESTARTED AND NORMAL T…
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THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIATELY RESTART. AFTER A MINUTE OR TWO THE ENGINE HAS RESTARTED AND NORMAL TRAVEL RESUMED. HOW OFTEN IT OCCURS, SINCE JULY 24TH 2009 THIS FAILURE HAS OCCURRED ON FIVE OCCASIONS. . ITS CONSEQUENCES, THERE HAVE BEEN NO CRASHES BUT SEVERAL NEAR MISSES HAVE BEEN ASSOCIATED WITH THE FAILURES. THE DAY OF SEPTEMBER 17TH 2009 HAD TWO FAILURES. THE FIRST OCCURRED WHILE TRAVELING ALONG DIVIDED STATE ROUTE AT 65 MPH WHEN THE ENGINE SUDDENLY STALLED BUT I WAS ABLE TO PULL OUT OF TRAFFIC AND RESTART THE ENGINE AFTER THE COOL DOWN PERIOD. THERE WERE NO SES INDICATORS BEING SHOWN. THE SECOND ENGINE FAILURE OCCURRED ON MY WAY HOME. I WAS A TRAVELING ALONG STATE ROUTE 35 WHICH IS A DIVIDED HIGHWAY BUT HAS A GREAT DEAL OF TRAFFIC ON IT. THIS HIGHWAY ALSO HAS SEVERAL STOP LIGHTS IN THE AREA OF BEAVERCREEK OHIO. I HAD STOPPED AT A RED LIGHT AND WHEN I STARTED TO ACCELERATE THE ENGINE SUDDENLY DIED. TRAFFIC BEHIND ME HAD STARTED TO ACCELERATE BUT SUDDENLY HAD TO TAKE EVASIVE ACTION TO AVOID HITTING MY STALLED VEHICLE. THE GROUP OF TRAFFIC THAT WAS BEHIND ME WAS ABLE TO GET AROUND ME LEAVING ME SITTING DEAD IN THE MIDDLE OF THE HIGHWAY WITH MY 4-WAY FLASHERS ON. FURTHER TRAFFIC WAS NOT PAYING ATTENTION AND ALMOST REAR ENDED ME WHILE I WAS STALLED. I PUSHED THIS 6,700 LBS. 4X4 TRUCK OFF THE HIGHWAY MYSELF TO THE SHOULDER AND WAS NEARLY HIT A COUPLE OF TIME DURING THE PROCESS. AFTER A VERY LONG COOL DOWN PERIOD, THE ENGINE FINALLY RESTARTED. THIS TIME THERE WAS AN SES INDICATOR AND I PROCEEDED TO DRIVE TO AUTOZONE WHERE THEY SAID IT WAS THE 'CRANKSHAFT POSITION SENSOR' FAILURE. WHAT WAS DONE TO CORRECT THE FAILURE; AT THIS TIME NOTHING HAS BEEN DONE TO CORRECT THE FAILURE AND THE TRUCK IS NOT. *TR
NHTSA ODI #10285452
52,571 miles · Sep 27, 2009
Engine And Engine Cooling
THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIAT…
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THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIATELY RESTART. AFTER A MINUTE OR TWO THE ENGINE HAS RESTARTED AND NORMAL TRAVEL RESUMED. HOW OFTEN IT OCCURS, SINCE JULY 24TH 2009 THIS FAILURE HAS OCCURRED ON FIVE OCCASIONS. THE ONLY COMMON FACTOR THAT I HAVE BEEN ABLE TO ISOLATE IS THAT THE FAILURES HAVE ALL OCCURRED WITHIN THE FIRST TWENTY MINUTES OF DRIVING. ITS CONSEQUENCES, THERE HAVE BEEN NO CRASHES BUT SEVERAL NEAR MISSES HAVE BEEN ASSOCIATED WITH THE FAILURES. ON SEPTEMBER 10TH 2009, WHILE TRAVELING ALONG A RURAL ROAD AND APPROACHING A TRAFFIC SIGNAL THE ENGINE SUDDENLY DIES WITHOUT WARNING. I WAS ABLE TO PULL OFF THE ROAD AND THE ENGINE RESTARTED AFTER A COUPLE OF MINUTE COOL DOWN PERIOD. THERE WERE NO SERVICE ENGINE SOON (SES) INDICATORS BEING SHOWN. I THEN BEGAN TO SEARCH THE INTERNET AND FOUND THIS IS A COMMON FAILURE MODE WITH GM TRUCKS THAT HAVE THE 8.1 L ENGINE FROM THIS PERIOD AND THAT A SAFETY RECALL (07V521000) WAS DONE ON CERTAIN VIN NUMBERS TO REPLACE A DEFECTIVE OEM CRANKSHAFT POSITION SENSOR. WHAT WAS DONE TO CORRECT THE FAILURE;, AT THIS TIME NOTHING HAS BEEN DONE TO CORRECT THE FAILURE AND THE TRUCK IS NOT BEING USED. I FEEL THAT GM DOES NOT HAVE CONTAINMENT OF THIS FAILURE AND THAT ADDITIONAL VIN NUMBERS INCLUDING MINE NEED TO BE ADDED TO THE RECALL. FROM SEARCHING THE INTERNET, I HAVE FOUND SEVERAL OTHER FAILURE OCCURRENCES OUTSIDE THE CONTAINMENT RANGE. THE OLD PART IS AVAILABLE AND GM SHOULD REPLACE THE DEFECT BEFORE AN ACCIDENT DOES OCCUR CAUSING INJURY, DEATH, AND/OR LITIGATION. *TR
NHTSA ODI #10285451
52,469 miles · Sep 27, 2009
Engine And Engine Cooling
THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIAT…
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THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIATELY RESTART. AFTER A MINUTE OR TWO THE ENGINE HAS RESTARTED AND NORMAL TRAVEL RESUMED. HOW OFTEN IT OCCURS, SINCE JULY 24TH 2009 THIS FAILURE HAS OCCURRED ON FIVE OCCASIONS. THE ONLY COMMON FACTOR THAT I HAVE BEEN ABLE TO ISOLATE IS THAT THE FAILURES HAVE ALL OCCURRED WITHIN THE FIRST TWENTY MINUTES OF DRIVING. ITS CONSEQUENCES, THERE HAVE BEEN NO CRASHES BUT SEVERAL NEAR MISSES HAVE BEEN ASSOCIATED WITH THE FAILURES. SEPTEMBER 3RD 2009, ONCE AGAIN I WAS PULLING MY 12,000 LBS. CAMPER ALONG A STATE HIGHWAY 202 IN OHIO WHEN ONCE AGAIN THE ENGINE SUDDENLY STALLED AND I LOST ALL POWER TO THE ENGINE, POWER STEERING AND HYDRAULIC ASSISTED BRAKES. WE WERE GOING UP A HILL AND TRAFFIC BEHIND ME HAD TO SUDDENLY TAKE EVASIVE ACTION SINCE I WAS NO LONGER ACCELERATING AND WAS LOOSING SPEED AT A RAPID RATE. LUCKILY, THERE WAS JUST ENOUGH SHOULDER WIDTH THAT ALLOWED ME TO PULL OVER WITHIN 300 FEET. THE ENGINE RESTARTED AFTER A BRIEF COOL DOWN PERIOD BUT AGAIN I HAD NO IDEA AT THIS TIME WHY THE ENGINE HAD DIED. THERE WERE NO SERVICE ENGINE SOON (SES) INDICATORS BEING SHOWN. WHAT WAS DONE TO CORRECT THE FAILURE; I.E, PARTS REPAIRED OR REPLACED (AND IF OLD PART IS AVAILABLE), AT THIS TIME NOTHING HAS BEEN DONE TO CORRECT THE FAILURE AND THE TRUCK IS NOT BEING USED. I FEEL THAT GM DOES NOT HAVE CONTAINMENT OF THIS FAILURE AND THAT ADDITIONAL VIN NUMBERS INCLUDING MINE NEED TO BE ADDED TO THE RECALL. FROM SEARCHING THE INTERNET, I HAVE FOUND SEVERAL OTHER FAILURE OCCURRENCES OUTSIDE THE CONTAINMENT RANGE. THE OLD PART IS AVAILABLE AND GM SHOULD REPLACE THE DEFECT BEFORE AN ACCIDENT DOES OCCUR CAUSING INJURY, DEATH, AND/OR LITIGATION. *TR
NHTSA ODI #10285450
52,252 miles · Sep 27, 2009
Engine And Engine Cooling
THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIAT…
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THE EVENTS LEADING UP TO THE FAILURE, THIS FAILURE MODE HAS HAPPENED FIVE TIMES, TWICE WHILE PULLING A 12,000 LBS. CAMPER AND THREE TIMES DURING NORMAL DRIVING. WHEN HAULING THE CAMPER THE TRANSMISSION WAS IN THE 'TOW / HAUL' MODE. THE FAILURE, THE 8.1 L ENGINE SUDDENLY LOOSES ENGINE POWER AND STALLS AND WILL NOT IMMEDIATELY RESTART. AFTER A MINUTE OR TWO THE ENGINE HAS RESTARTED AND NORMAL TRAVEL RESUMED. HOW OFTEN IT OCCURS, SINCE JULY 24TH 2009 THIS FAILURE HAS OCCURRED ON FIVE OCCASIONS. THE ONLY COMMON FACTOR THAT I HAVE BEEN ABLE TO ISOLATE IS THAT THE FAILURES HAVE ALL OCCURRED WITHIN THE FIRST TWENTY MINUTES OF DRIVING. ITS CONSEQUENCES, THERE HAVE BEEN NO CRASHES BUT SEVERAL NEAR MISSES HAVE BEEN ASSOCIATED WITH THE FAILURES. ON JULY 24TH 2009, I HAD JUST MERGED INTO MODERATELY HEAVY TRAFFIC ON I-70 PULLING A 12,000 LBS. 5TH WHEEL CAMPER AND GAINING SPEED WHEN THE ENGINE SUDDENLY WITHOUT WARNING THE ENGINE STALLED. TRAFFIC FOLLOWING ME WHICH INCLUDED SEMI TRUCKS HAD TO MOVE TO THE CENTER LANE WHILE I PULLED OVER WITHOUT POWER STEERING TO THE RIGHT SHOULDER TO SLOW DOWN. THE ENGINE RESTARTED AFTER A BRIEF COOL DOWN PERIOD BUT I HAD NO IDEA AT THIS TIME WHY THE ENGINE HAD DIED. THERE WERE NO SERVICE ENGINE SOON (SES) INDICATORS BEING SHOWN. WHAT WAS DONE TO CORRECT THE FAILURE; I.E, PARTS REPAIRED OR REPLACED (AND IF OLD PART IS AVAILABLE), AT THIS TIME NOTHING HAS BEEN DONE TO CORRECT THE FAILURE AND THE TRUCK IS NOT BEING USED. I FEEL THAT GM DOES NOT HAVE CONTAINMENT OF THIS FAILURE AND THAT ADDITIONAL VIN NUMBERS INCLUDING MINE NEED TO BE ADDED TO THE RECALL. FROM SEARCHING THE INTERNET, I HAVE FOUND SEVERAL OTHER FAILURE OCCURRENCES OUTSIDE THE CONTAINMENT RANGE. THE OLD PART IS AVAILABLE AND GM SHOULD REPLACE THE DEFECT BEFORE AN ACCIDENT DOES OCCUR CAUSING INJURY, DEATH, AND/OR LITIGATION. *TR
NHTSA ODI #10285449
11,500 miles · Sep 23, 2009
Engine And Engine Cooling
THE BOLT HEADS ON THE EXHAUST MANIFOLDS RUST OFF, THE MANIFOLD BECOMES LOOSE AND CAUSES A LEAK THAT COULD 1 CAUSE A FIRE OR CARBON MONOXIDE POISONING.. *TR
NHTSA ODI #10285086
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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