NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports75,000 miles · Jun 25, 2012
Engine
WHILE DRIVING THE ENGINE DIED. IT TOOK SEVERAL ATTEMPTS TO RESTART. WHILE DRIVING, THE ENGINE DIED TWO OR THREE MORE TIMES. RESTARTED AND RAN TROUBLE FREE FOR A FEW DAYS. A WEEK OR TWO LATER IT TOOK SEVERAL ATTEMPTS TO START THE ENGINE. IT FINALLY STARTED AND RAN TROUBLE FREE FOR A WEEK OR SO. THIS CYCLE HAS REPEATED OVER THE PA…
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WHILE DRIVING THE ENGINE DIED. IT TOOK SEVERAL ATTEMPTS TO RESTART. WHILE DRIVING, THE ENGINE DIED TWO OR THREE MORE TIMES. RESTARTED AND RAN TROUBLE FREE FOR A FEW DAYS. A WEEK OR TWO LATER IT TOOK SEVERAL ATTEMPTS TO START THE ENGINE. IT FINALLY STARTED AND RAN TROUBLE FREE FOR A WEEK OR SO. THIS CYCLE HAS REPEATED OVER THE PAST MONTH OR SO. I LOOKED UP THE ISSUE ON YOUR WEB SIGHT AND NOTED A RECALL FOR THIS VERY PROBLEM. I CONTACTED THE LOCAL DEALER AND WAS TOLD THERE WERE NO RECALLS FOR MY VEHICLE. I CONTACTED GM AND WAS TOLD THE SAME THING. *TR
NHTSA ODI #10462982
88,014 miles · Jun 10, 2012
Service Brakes
WAS TOWING A 4200 LB LOAD WHEN THE BRAKE PEDAL WENT TO THE FLOOR. NO WARNING LIGHT. PULLED SAFELY OFF OF THE HIGHWAY (BARELY!) AND INTO OCEAN PERFORMANCE MARINE - AT THE END OF THE I-95 OFFRAMP. LEFT THE BOAT THERE AND HAD THE SILVERADO TOWED. A BRAKE LINE RUPTURED AND WAS LEAKING BRAKE FLUID BADLY. STILL NO WARNING LIGHT. *TR
NHTSA ODI #10461137
141,311 miles · Jun 4, 2012
Equipment Adaptive/mobilityService BrakesSteeringInjury
TRAVELING AT 65 MPH BRAKES ALL OF A SUDDEN THE BRAKES WERE APPLIED W/O APPLYING THEM LOSS OF STEERING CONTROL ETC. EVALUATING THIS PROBLEM II SAW THAT THE BRAKE PEDAL WAS GOING DOWN TO THE FLOOR, SO I PULLED UP ON IT WITH MY FOOT AND THE BRAKES RELEASED BUT STEERING CONTROL DID NOT RESUME. I GOT OFF AT THE NEXT EXIT AND VERY SL…
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TRAVELING AT 65 MPH BRAKES ALL OF A SUDDEN THE BRAKES WERE APPLIED W/O APPLYING THEM LOSS OF STEERING CONTROL ETC. EVALUATING THIS PROBLEM II SAW THAT THE BRAKE PEDAL WAS GOING DOWN TO THE FLOOR, SO I PULLED UP ON IT WITH MY FOOT AND THE BRAKES RELEASED BUT STEERING CONTROL DID NOT RESUME. I GOT OFF AT THE NEXT EXIT AND VERY SLOWLY MADE MY WAY ON HOME. ANY APPLICATION OF THE BRAKE PEDAL RESULTED IN BRAKES LOCKING UP AND THEY WERE APPLIED SO TIGHTLY THAT ANY ACCELERATION COULD NOT SPEED UP UNLESS I PULLED UP ON THE BRAKE PEDAL. UPON ARRIVING HOME LOOKED THINGS OVER NO POWER STEERING UNLESS MOTOR WAS AT HIGH RPM,POWER STEERING PUMP LOOKED AS IF IT EXPELLED FLUID OUT THE BREATHER CAP AND THE BRAKES SMELLED AS IF VERY HOT. NOW THAT THIS HAPPENED I RECOGNIZED THIS HAD HAPPENED BEFORE BUT SOMEHOW REPAIRED ITSELF,BUT NOT TO THIS EXTREME. I SUFFERED BRUISES FROM SHOULDER HARNESS AND SEATBELT AND SOME KNOTS ON MY HEAD FROM BEING THROWN AROUND I CAME SO CLOSE TO OUT OF CONTROL AND A ROLLOVER SIMPLY COULDN'T CONTROL MY TRUCK. *TR
NHTSA ODI #10460608
130,000 miles · May 31, 2012
Engine
4 BOLTS ON THE EXHAUST MANIFOLD SHEARED ( BROKEN). *TR
NHTSA ODI #10460142
190,251 miles · May 21, 2012
Engine
FOUND 4 OUT OF 12 EXHAUST MANIFOLD MOUNTING BOLTS BROKEN. *TT
NHTSA ODI #10459196
22,000 miles · Apr 21, 2012
Service Brakes, Hydraulic
I PURCHASED A NEW 2001 CHEVY HD ON AUGUST 10,2001. THE TRUCK IS SERVICED EVERY 3,000 MILES AND IT HAS APPROXIMATELY 57,000 MILES ON THE TRUCK. IT STILL LOOKS NEW BOTH INSIDE AND OUT. AT APPROXIMATELY 22,000 MILES THE BACK ROTORS AND BRAKES WERE REPLACED THEN AT ABOUT 32,000 MILES THE FRONT ROTORS AND BRAKES HAD TO BE REPLACED…
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I PURCHASED A NEW 2001 CHEVY HD ON AUGUST 10,2001. THE TRUCK IS SERVICED EVERY 3,000 MILES AND IT HAS APPROXIMATELY 57,000 MILES ON THE TRUCK. IT STILL LOOKS NEW BOTH INSIDE AND OUT. AT APPROXIMATELY 22,000 MILES THE BACK ROTORS AND BRAKES WERE REPLACED THEN AT ABOUT 32,000 MILES THE FRONT ROTORS AND BRAKES HAD TO BE REPLACED, AND THEN LAST SUMMER THE BACK BRAKES HAD TO BE REPLACED AND THE ROTORS WERE TURNED. ALSO SOMETIME WITHIN 30,000 - 45,000 MILES ALL THE BRAKE LINES HAD TO BE REPLACED AS WELL AS TWO DIFFERENT ALTERNATORS AND A WINDOW MOTOR. TODAY (APRIL 20,2012) MY WIFE AND I WERE GOING TO TOWN TO GET SOMETHING TO EAT, WHEN AN EMERGENCY VEHICLE PULLED ONTO A STREET THAT WE WERE ON BUT WAS GOING IN THE OPPOSITE DIRECTION. I APPLIED THE BRAKES TO SLOW DOWN AND PULL OVER AND WHEN I DID THE BRAKES WENT TO THE FLOOR. LUCKILY I HAD ROOM TO MOVE THE TRUCK TO GET OUT OF THE WAY AND AFTER SOME DISTANCE WE GOT STOPPED. WE NURSED THE TRUCK HOME AND ITS SITTING IN MY DRIVEWAY AGAIN WITH SOME TYPE OF A BRAKE PROBLEM.I THINK THAT I HAVE REPORTED THIS BEFORE BUT A TRUCK THAT IS BABIED AND TREATED LIKE MINE WITH ONLY 57,000 MILES ON IT THAT HAS TO HAVE THREE SETS OF BRAKES (NOT COUNTING THE ORIGINAL), ALL THE BRAKE LINES COMPLETELY REPLACED BECAUSE THEY WERE COMPLETELY RUSTED AWAY. ROTORS REPLACED FRONT AND REAR AND ROTORS REPLACED AND TURNED A SECOND TIME, AND NOW SOMETHING BRAKE RELATED BROKEN AGAIN SHOULD GET SOMEONE'S ATTENTION. THESE TRUCKS AREN'T SAFE, AND NO ONE BUYS INTO THE ENVIRONMENT OR LACK OF DRIVING EXCUSES. I ALSO HAVE A 1997 CHEVY TRUCK WITH APPROXIMATELY 126,000 MILES WITH NO PROBLEMS AT ALL, A TRUCK WITH 57,000 MILES THAT REQUIRES TWO ALTERNATORS (NOT COUNTING THE ORIGINAL), WHEEL SENSORS,BRAKE LINES / ROTORS / BRAKES THAT YOU HAD BETTER NOT TRUST AND A WHOLE LOT OF MONEY TO KEEP THE THING ON THE ROAD IS NOT A QUALITY PRODUCT. *JS *TR
NHTSA ODI #10455948
Mileage unknown · Mar 7, 2012
Electrical System
THE INSTRUMENT PANEL(SPEEDOMETER, FUEL GAUGE, ETC.) IS COMPLETELY INOPERABLE. I'VE READ A TON FORUMS THAT MANY OWNERS ARE HAVING OR WERE(SINCE PAID OUT-OF-POCKET) HAVING THE SAME PROBLEM. GM/CHEVROLET HAS REPORTED THAT THE COST FOR REPAIR IS $500. LET ME ALSO ADD, THIS PROBLEM ISN'T IN JUST MY PARTICULAR MODEL AND YEAR, BUT …
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THE INSTRUMENT PANEL(SPEEDOMETER, FUEL GAUGE, ETC.) IS COMPLETELY INOPERABLE. I'VE READ A TON FORUMS THAT MANY OWNERS ARE HAVING OR WERE(SINCE PAID OUT-OF-POCKET) HAVING THE SAME PROBLEM. GM/CHEVROLET HAS REPORTED THAT THE COST FOR REPAIR IS $500. LET ME ALSO ADD, THIS PROBLEM ISN'T IN JUST MY PARTICULAR MODEL AND YEAR, BUT NEWER MODELS AS WELL. THIS IS HUGE SAFETY PROBLEM BEING THE OPERATOR OF THE VEHICLE DOESN'T KNOW THE SPEED OF HIS VEHICLE. *TR
NHTSA ODI #10450625
106,354 miles · Feb 11, 2012
Service Brakes, Hydraulic
THE BRAKE LINE RUPTURED UNDER THE DRIVER'S SEAT DUE TO RUST. THIS HAPPENED WITH THE TRUCK UNLOADED AND IN MY DRIVEWAY. I SIMPLY PRESSED THE BREAK PEDDLE TO PUT THE TRUCK IN REVERSE. ALL OF THE LINES ARE EXTREMELY CORRODED. *TR
NHTSA ODI #10447489
Mileage unknown · Dec 21, 2011
Electrical SystemEngine And Engine CoolingFuel System, Gasoline
MY VEHICLE WOULD STALL OUT ON ME AT ANY TIME FOR ABOUT 2 MONTHS IT DIDN'T MATTER WHAT SPEED I WAS DOING OR WHERE I WAS IT WOULD STALL OUT SO I WOULD HAVE TO COAST TO THE SIDE OF THE ROAD WITH NO POWER STEERING AND WAIT TO CRANK THE VEHICLE BACK UP. THEN DECEMBER 23 2008 I WAS ON MY WAY HOME AND IT COMPLETELY STOPPED I COULDN'T G…
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MY VEHICLE WOULD STALL OUT ON ME AT ANY TIME FOR ABOUT 2 MONTHS IT DIDN'T MATTER WHAT SPEED I WAS DOING OR WHERE I WAS IT WOULD STALL OUT SO I WOULD HAVE TO COAST TO THE SIDE OF THE ROAD WITH NO POWER STEERING AND WAIT TO CRANK THE VEHICLE BACK UP. THEN DECEMBER 23 2008 I WAS ON MY WAY HOME AND IT COMPLETELY STOPPED I COULDN'T GET IT TO CRANK BATTERY WAS COMPLETELY DEAD AND IT WAS AT NIGHT ON A HIGHWAY. I TOOK IT TO EVERY DEALER SHIP AND EVERY MECHANIC AND NOONE COULD TELL ME WHAT WAS WRONG WITH IT. FINALLY I LOOKED ONLINE AT RECALLS AND FOUND THAT THERE IS A RECALL FOR THE EXACT MAKE AND MODEL OF MY VEHICLE BUT WHEN I CALLED GMC THEY TOLD ME THAT THERE WAS NO RECALL FOR MY VEHICLE SO I WENT AND PAID OUT OF MY OWN POCKET TO FIX THIS PROBLEM. THIS IS A MAJOR PROBLEM THAT THEY HAVE FOUND BUT AREN'T DOING ANYTHING ABOUT IT FOR ME I MEAN IF THEY HAVE THE RECALL ALREADY FOR THE SAME VEHICLE THEN WHY ISN'T MY VEHICLE INCLUDED? *TR
NHTSA ODI #10440906
Mileage unknown · Dec 13, 2011
Service Brakes, Hydraulic
I WAS SLOWING DOWN, COMING TO A 4 WAY STOP. THAT WAS WHEN THE BRAKES WENT TO THE FLOOR BOARD, AND I WENT THROUGH THE 4 WAY WITHOUT STOPPING!!!! I WAS VERY LUCKY BECAUSE THERE WAS NOBODY GOING THROUGH THAT 4 WAY AT THAT TIME!!! THE BRAKE LINE UNDER THE DRIVER SIDE DOOR HAD LEAK DO TO RUSTING!!!! ALSO I HAD JUST DROP OFF MY TRAVEL…
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I WAS SLOWING DOWN, COMING TO A 4 WAY STOP. THAT WAS WHEN THE BRAKES WENT TO THE FLOOR BOARD, AND I WENT THROUGH THE 4 WAY WITHOUT STOPPING!!!! I WAS VERY LUCKY BECAUSE THERE WAS NOBODY GOING THROUGH THAT 4 WAY AT THAT TIME!!! THE BRAKE LINE UNDER THE DRIVER SIDE DOOR HAD LEAK DO TO RUSTING!!!! ALSO I HAD JUST DROP OFF MY TRAVEL TRAILER BEFORE THIS HAPPENED. COULDN'T IMAGINE WHAT WOULD HAVE HAPPEN TRYING TO STOP 9500LBS!!!!!!!!! *TR
NHTSA ODI #10439832
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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