NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
72 reports61,607 miles · Apr 16, 2010
Service Brakes, Hydraulic
ON MY 2001 CHEVY SILVERADO 3500 PICK UP ,I TOOK IT TO THE DEALER TO BE CHECKED OUT BECAUSE MY BRAKES DIDN'T ACT RIGHT SO I TOOK IT IN AND A SHORT TIME LATER I RECEIVED A CALL FROM THE DEALER ASKING ME HOW DID I GET THE TRUCK INTO THE DEALER BECAUSE THE BRAKE LINE WAS GONE ROTTED AWAY .THEY HAD TO REPLACE ALL MY BRAKE LINES FOR T…
Read full complaint
ON MY 2001 CHEVY SILVERADO 3500 PICK UP ,I TOOK IT TO THE DEALER TO BE CHECKED OUT BECAUSE MY BRAKES DIDN'T ACT RIGHT SO I TOOK IT IN AND A SHORT TIME LATER I RECEIVED A CALL FROM THE DEALER ASKING ME HOW DID I GET THE TRUCK INTO THE DEALER BECAUSE THE BRAKE LINE WAS GONE ROTTED AWAY .THEY HAD TO REPLACE ALL MY BRAKE LINES FOR THIS TRUCK. IT WAS A GOOD THING THAT IT HAPPENED WHEN IT DID BECAUSE A FEW WEEKS LATER I WOULD HAVE BEEN PULLING MY 33 FOOT 5TH WHEEL AND WITH THAT KIND OF WEIGHT I SURELY WOULD HAVE HAD A WRECK. *TR
NHTSA ODI #10326062
47,300 miles · Apr 12, 2010
Engine And Engine Cooling
I HAVE A 2001 CHEVROLET SILVERADO 3500 CREW CAB WITH DUAL WHEELS. SEVERAL TIMES RECENTLY THE TRUCK HAS LOST POWER WHILE DRIVING AT HIGHWAY SPEEDS. YESTERDAY MY WIFE WAS DRIVING IT, AND IT SHUT OFF WHILE TURNING A CORNER IN THE CENTER OF EXETER NH. IT LOST POWER STEERING AND THE TRUCK WENT OFF THE ROAD ONTO THE SIDEWALK BY THE T…
Read full complaint
I HAVE A 2001 CHEVROLET SILVERADO 3500 CREW CAB WITH DUAL WHEELS. SEVERAL TIMES RECENTLY THE TRUCK HAS LOST POWER WHILE DRIVING AT HIGHWAY SPEEDS. YESTERDAY MY WIFE WAS DRIVING IT, AND IT SHUT OFF WHILE TURNING A CORNER IN THE CENTER OF EXETER NH. IT LOST POWER STEERING AND THE TRUCK WENT OFF THE ROAD ONTO THE SIDEWALK BY THE TOWN HALL, NARROWLY MISSING PEDESTRIANS. I TOOK IT TO A GARAGE AND FOUND OUT IT IS BEING CAUSED BY THE CRANK SHAFT POSITION SENSOR THEY TOLD ME THERE WAS A DEALER RECALL. I CALLED THE DEALER AND THEY SAID MY VEHICLE ISN'T INCLUDED. THE NHTSA CAMPAIGN # FOR THE EXISTING RECALL IS 07V52100. *TR
NHTSA ODI #10325128
111,000 miles · Jul 30, 2009
Engine And Engine Cooling
2001 CHEVY SILVERADO PICK UP 8.1LITER. VEHICLE WILL SHUT DOWN WITHOUT ANY WARNINGS. THEN WILL RESTART AFTER SLIGHT COOL DOWN. HAPPENED ON SEVERAL DIFFERENT OCCASIONS. FOUND RECALL NOTICE NO. 06083. CALLED GM AND WAS TOLD MY VIN# DOESN'T MATCH. HOW DOES GM KNOWINGLY LET THIS HAPPEN JUST BECAUSE NOT ENOUGH COMPLAINTS HAVE BEEN IS…
Read full complaint
2001 CHEVY SILVERADO PICK UP 8.1LITER. VEHICLE WILL SHUT DOWN WITHOUT ANY WARNINGS. THEN WILL RESTART AFTER SLIGHT COOL DOWN. HAPPENED ON SEVERAL DIFFERENT OCCASIONS. FOUND RECALL NOTICE NO. 06083. CALLED GM AND WAS TOLD MY VIN# DOESN'T MATCH. HOW DOES GM KNOWINGLY LET THIS HAPPEN JUST BECAUSE NOT ENOUGH COMPLAINTS HAVE BEEN ISSUED FOR THIS BATCH OF TRUCKS WHEN IT HAS THE SAME DIAGNOSES AS THE OTHERS??? NO MORE GM FOR ME! *TR
NHTSA ODI #10278808
105,000 miles · Jul 22, 2009
Fuel System, Diesel
2001 CHEVY SILVERADO DIESEL - DOING 65 MPH ON THE HIGHWAY - MOTOR STARTING SKIPPING AND THEN HAD A LOSS OF POWER. DIESEL FUEL CAN BE SMELLED. PULLED OFF HIGHWAY AND CHECKED THE TRUCK. DIESEL FUEL WAS FOUND BLOWN ALL OVER THE UNDERCARRIAGE INCLUDING THE EXHAUST. I WAS WORRIED THAT THE TRUCK WOULD CATCH ON FIRE. BROUGHT THE T…
Read full complaint
2001 CHEVY SILVERADO DIESEL - DOING 65 MPH ON THE HIGHWAY - MOTOR STARTING SKIPPING AND THEN HAD A LOSS OF POWER. DIESEL FUEL CAN BE SMELLED. PULLED OFF HIGHWAY AND CHECKED THE TRUCK. DIESEL FUEL WAS FOUND BLOWN ALL OVER THE UNDERCARRIAGE INCLUDING THE EXHAUST. I WAS WORRIED THAT THE TRUCK WOULD CATCH ON FIRE. BROUGHT THE TRUCK TO A CHEVY DEALER TO GET CHECKED OUT AND FOUND OUT IT WAS CAUSED BY FAULTY INJECTORS THAT CHEVY IS AWARE OF BUT IF THE TRUCK IS OVER 7 YEARS OLD AND IS NOT COVERED BY THE "DEFECTIVE INJECTOR WARRANTY". I DON'T UNDERSTAND HOW THEY ISSUED A WARRANTY ON THE PART BECAUSE THEY WERE AWARE THAT IT WAS DEFECTIVE INSTEAD OF HAVING THE PART RECALLED. *TR
NHTSA ODI #10277993
62,900 miles · May 5, 2009
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHILE DRIVING AT ANY SPEED, THE VEHICLE HESITATES AND THE MOTOR SHUTS OFF, AND THE POWER STEERING FAILS. THE VEHICLE WILL RESTART AFTER FOUR OR FIVE ATTEMPTS. THE FAILURE HAS OCCURRED MORE THAN TEN TIMES. HE TOOK THE VEHICLE TO A MECHANIC AND THEY PERFORMED DIAGNOSTIC TEST…
Read full complaint
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHILE DRIVING AT ANY SPEED, THE VEHICLE HESITATES AND THE MOTOR SHUTS OFF, AND THE POWER STEERING FAILS. THE VEHICLE WILL RESTART AFTER FOUR OR FIVE ATTEMPTS. THE FAILURE HAS OCCURRED MORE THAN TEN TIMES. HE TOOK THE VEHICLE TO A MECHANIC AND THEY PERFORMED DIAGNOSTIC TESTING, WHICH INDICATED THAT THERE WERE NO FAILURES WITH THE VEHICLE BECAUSE NO ERROR CODE WAS PRODUCED. THE MECHANIC NOTIFIED HIM OF A RECALL FOR HIS MODEL VEHICLE WITH IDENTICAL FAILURES; HOWEVER, THE NHTSA CAMPAIGN ID NUMBER WAS UNABLE TO BE FOUND IN THE NHTSA DATABASE. THE VEHICLE HAS NOT YET BEEN REPAIRED. THE FAILURE MILEAGE WAS 62,900 AND CURRENT MILEAGE WAS 63,148. UPDATED 07/02/09. *LJ
NHTSA ODI #10267783
65,135 miles · Apr 22, 2009
Service Brakes, Hydraulic
THE BRAKSE ON MY 2001 SILVERADO 3500 HAVE BEEN INTERMITTENT THE PAST FEW YEARS. MOST OF THE TIME THEY WORK FINE BUT TODAY WAS THE WORST EXPERIENCE OF ALL THE REST. I PULLED UP TO A STOP LIGHT, PEDESTRIANS STEPPED INTO THE CROSS WALK, I STEPPED ON THE BRAKES AND WENT RIGHT THROUGH THE RED LIGHT. FORTUNATELY THE PEDESTRIANS WER…
Read full complaint
THE BRAKSE ON MY 2001 SILVERADO 3500 HAVE BEEN INTERMITTENT THE PAST FEW YEARS. MOST OF THE TIME THEY WORK FINE BUT TODAY WAS THE WORST EXPERIENCE OF ALL THE REST. I PULLED UP TO A STOP LIGHT, PEDESTRIANS STEPPED INTO THE CROSS WALK, I STEPPED ON THE BRAKES AND WENT RIGHT THROUGH THE RED LIGHT. FORTUNATELY THE PEDESTRIANS WERE ABLE TO JUMP OUT OF THE WAY AS I COASTED RIGHT THROUGH THEM. THE BRAKES WORKED FINE UNTIL I GOT HOME THEN I ALMOST COASTED INTO MY GARAGE DOOR. *TR
NHTSA ODI #10266436
74,000 miles · Mar 27, 2009
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE CONSTANTLY SHUTS OFF. SOMETIMES IT WILL RESTART IMMEDIATELY, BUT OTHER TIMES IT TAKES LONGER TO RESTART. WHEN THE FAILURE OCCURS, THE STEERING AND BRAKES FAIL COMPLETELY, WHICH MAKES IT DIFFICULT TO CONTROL THE VEHICLE. THE MANU…
Read full complaint
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHILE DRIVING AT VARIOUS SPEEDS, THE VEHICLE CONSTANTLY SHUTS OFF. SOMETIMES IT WILL RESTART IMMEDIATELY, BUT OTHER TIMES IT TAKES LONGER TO RESTART. WHEN THE FAILURE OCCURS, THE STEERING AND BRAKES FAIL COMPLETELY, WHICH MAKES IT DIFFICULT TO CONTROL THE VEHICLE. THE MANUFACTURER STATED THAT THE VEHICLE WAS NOT INCLUDED IN A RECALL DUE TO THE EXCESSIVE MILEAGE. THE FAILURE MILEAGE WAS 74,000.
NHTSA ODI #10263268
72,000 miles · Dec 9, 2008
Electrical SystemFuel System, GasolineService Brakes, Electric
VEHICLE IS STALLING AND NOT STARTING AND BRAKES HAVE TO BE REPLACED MORE OFTEN THAN ANY NORMAL VEHICLE/TRUCK/VAN. THIS OCCURRENCE HAS BEEN HAPPENING FOR THE LAST 2 YEARS. TOOK THE VEHICLE TO MANY MECHANICS AND EVEN THE DEALER. ALL TYPES OF THINGS HAVE BEEN REPLACED (FUEL PUMP, STARTER, TUNE-UP, SPARK PLUGS, BRAKES, BRAKE DISC, R…
Read full complaint
VEHICLE IS STALLING AND NOT STARTING AND BRAKES HAVE TO BE REPLACED MORE OFTEN THAN ANY NORMAL VEHICLE/TRUCK/VAN. THIS OCCURRENCE HAS BEEN HAPPENING FOR THE LAST 2 YEARS. TOOK THE VEHICLE TO MANY MECHANICS AND EVEN THE DEALER. ALL TYPES OF THINGS HAVE BEEN REPLACED (FUEL PUMP, STARTER, TUNE-UP, SPARK PLUGS, BRAKES, BRAKE DISC, ROTORS, ETC...) AND IT STILL HAS THE SAME PROBLEM. THE VEHICLE IS STALLING AND IT SEEMS THAT ENOUGH GAS IS NOT GETTING TO THE ENGINE AND IT SEEMS THAT BRAKES WEAR QUITE TOO OFTEN. I KNOW THIS MAY COST THE COMPANY ALOT TO RECALL BUT WE AS CITIZENS PAY ALOT FOR THESE VEHICLES AND THEY SHOULD OWN UP TO THESE MANUFACTURING ISSUES. I HAVE INVESTIGATED THIS PROBLEM ONLINE AND THERE ARE MANY OTHERS OUT THERE LIKE MYSELF THAT HAVE REPORTED THE SAME PROBLEM FROM MODELS DATING BACK TO 1997. PLEASE ASSIST ME WITH GETTING THE MANUFACTURER TO FIX THIS PROBLEM, TIMES ARE HARD AND I CAN'T AFFORD TO SPEND ANOTHER DIME ON THIS VEHICLE WHEN I SHOULDN'T. DATE LISTED BELOW IS THE LAST OCCURRENCE AND I AM AT MY WITS END. THANKS IN ADVANCE FOR YOUR ASSISTANCE. *TR
NHTSA ODI #10251240
112,000 miles · Sep 30, 2008
Power Train
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHEN THE VEHICLE WAS TAKEN TO THE DEALER FOR TRANSMISSION SERVICE, THEY FOUND THAT THE TRANSFER CASE DID NOT HAVE ANY OIL. THE DEALER STATED THAT A WASHER FAILED, WHICH CAUSED THE OIL PUMP IN THE TRANSFER CASE TO LOOSEN AND PUNCTURE A HOLE IN THE BOTTOM OF THE COMPONENT. AS…
Read full complaint
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 3500. WHEN THE VEHICLE WAS TAKEN TO THE DEALER FOR TRANSMISSION SERVICE, THEY FOUND THAT THE TRANSFER CASE DID NOT HAVE ANY OIL. THE DEALER STATED THAT A WASHER FAILED, WHICH CAUSED THE OIL PUMP IN THE TRANSFER CASE TO LOOSEN AND PUNCTURE A HOLE IN THE BOTTOM OF THE COMPONENT. AS A RESULT, THE OIL DRAINED OUT. THE DEALER WAS AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 112,000. UPDATED 12/12/08 *CN THE CONSUMER TOOK THE VEHICLE TO A REPAIR SHOP AND A SMALL HOLE WAS FOUND IN THE TRANSFER CASE AFTER NOTICING NO OIL IN THE TRANSFER CASE. THE MECHANIC STATED THE OIL PUMP IN THE TRANSFER CASE BECAME LOOSE AND CREATED A HOLE IN THE CASE. UPDATED 12/15/08. 8JB
NHTSA ODI #10244005
50,000 miles · Jul 28, 2008
Service Brakes, Hydraulic
2002 CHEVROLET K-3500. ANTI-LOCK BRAKE SYSTEM IS ACTIVATING AT SLOW SPEEDS ON DRY ROADS WITH MINIMAL BRAKE PEDAL PRESSURE, CAUSING QUESTIONABLE BRAKING AND STOPPING ABILITY. *TR
NHTSA ODI #10235984
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.
Illustration