NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports98,000 miles · Dec 7, 2011
Service Brakes, Hydraulic
DRIVING ALONG AND ATTEMPTED TO STOP, WHEN THE BRAKES SUDDENLY FAILED. PEDAL WENT TO FLOOR. UPON CHECKING THE TRUCK, THE FRONT BRAKE LINES FROM THE MASTER CYLINDER ARE COMPLETELY RUSTED AS THEY TURN AND ROUTE OVER THE FRAME TO THE ABS UNIT WHICH IS MOUNTED UNDER THE DRIVER SEAT FLOOR. UPON INSPECTION, ALL OF THE LINES ARE SEVERE…
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DRIVING ALONG AND ATTEMPTED TO STOP, WHEN THE BRAKES SUDDENLY FAILED. PEDAL WENT TO FLOOR. UPON CHECKING THE TRUCK, THE FRONT BRAKE LINES FROM THE MASTER CYLINDER ARE COMPLETELY RUSTED AS THEY TURN AND ROUTE OVER THE FRAME TO THE ABS UNIT WHICH IS MOUNTED UNDER THE DRIVER SEAT FLOOR. UPON INSPECTION, ALL OF THE LINES ARE SEVERELY CORRODED AND WILL REQUIRE REPLACEMENT. ONE LET LOOSE DUE TO THE RUST AND CORROSION, AND CAUSED A LARGE LEAK, RESULTING IN THE PEDAL GOING TO THE FLOOR AND THE BRAKES FAILING. THIS IS A ONE OWNER TRUCK AND HAS NOT HAD ANY MODIFICATIONS TO IT. THE PLACEMENT OF THE ABS UNIT AND THE WAY THE LINES ARE ROUTED EXPOSES THE BRAKE LINES TO ALL OF THE ROAD SPRAY AND THEREFORE ROAD SALT, WHICH CORRODES THE LINES PREMATURELY. IF INVESTIGATORS WOULD LIKE TO COME OUT AND INSPECT THIS VEHICLE, CONTACT ME- IT HAS NOT BEEN TOUCHED AND IS AS IT CAME FROM THE FACTORY. THIS NEEDS TO BE HANDLED BY GM ASAP. THIS IS A CRASH WAITING TO HAPPEN.THIS HAS ALREADY PROVED TO BE VERY DANGEROUS, AS THE LOSS OF THE BRAKES WAS SUDDEN AND WITHOUT WARNING. THE PEDAL GOES TO THE FLOOR WITH LITTLE, MAKE THAT VERY LITTLE BRAKING ABILITY LEFT INTACT. IF I WERE TO BE TOWING ANYTHING OR GOING FASTER, IT WOULD HAVE RESULTED IN A CRASH FOR SURE. PLEASE KEEP IN MIND THIS IS A 2500HD, WHICH IS USED BY MOST TO TOW LARGE, HEAVY ITEMS, AS IT WAS DESIGNED TO DO. BRAKES SHOULD NOT FAIL IN THIS FASHION. THIS IS A UNIVERSAL PROBLEM IN THE SNOW BELT AND THE OWNERS SHOULD BE AT LEAST WARNED TO CHECK THEIR LINES BEFORE A CRASH OCCURS. PLEASE ISSUE A RECALL AND WARN OTHERS AS THESE TRUCKS ARE STARTING TO AGE AND WILL BE FAILING AT AN ALARMING RATE. THIS IS A SAFETY NIGHTMARE. THIS IS A REAL THREAT FOR THOSE WHO LIVE IN THE SALT BELT-PLEASE UPGRADE THIS INVESTIGATION ASAP BEFORE SOMEONE GETS KILLED AS A RESULT OF THIS SUDDEN BRAKE LOSS. *TR
NHTSA ODI #10438824
102,000 miles · Nov 9, 2011
Service Brakes, Hydraulic
ABS SYSTEM ACTIVATES WHILE STOPPING AT SLOW SPEEDS, MAKES BRAKE PEDAL SHUTTER, ABS MAKES NOISE. THIS CAUSES THE VEHICLE TO NOT MAKE A COMPLETE STOP IMMEDIATELY. VEHICLE HAS BRAND NEW BRAKES AND ROTORS. ALSO ALL BRAKE LINES ARE BADLY CORRODED. CONTACTED CHEVROLET IN REGARDS TO THE SERVICE BRAKES, HYDRAULIC: ANTILOCK RECALL OF…
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ABS SYSTEM ACTIVATES WHILE STOPPING AT SLOW SPEEDS, MAKES BRAKE PEDAL SHUTTER, ABS MAKES NOISE. THIS CAUSES THE VEHICLE TO NOT MAKE A COMPLETE STOP IMMEDIATELY. VEHICLE HAS BRAND NEW BRAKES AND ROTORS. ALSO ALL BRAKE LINES ARE BADLY CORRODED. CONTACTED CHEVROLET IN REGARDS TO THE SERVICE BRAKES, HYDRAULIC: ANTILOCK RECALL OF 8/29/2005 FOR SALT STATES #49552 - THEY INDICATE MY VEHICLE IS NOT IN THE RECALL??? *TR
NHTSA ODI #10434976
76,600 miles · Nov 6, 2011
Service Brakes, Hydraulic
CORRODED BRAKE LINES CAUSED FLUID LEAK. LINES REPLACED AT MY EXPENSE. ANTI-LOCK UNIT NOW FAULTY AND LIKELY DUE TO CONTAMINATION FROM CORRODED BRAKE LINES. ANTI-LOCK WHEEL SENSORS FAILED NUMEROUS TIMES, ONCE REPLACED UNDER WARRANTY, TWICE AT MY EXPENSE.
NHTSA ODI #10434708
122,600 miles · Sep 29, 2011
Service Brakes, Hydraulic
THE METAL LINE RUNNING FROM THE ABS/PROPORTIONING VALVE TO THE REAR BRAKES IS COMPLETELY RUSTED AND FAILED WHILE DRIVING HOME. THERE IS ALMOST NO BRAKING LEFT ON THE TRUCK. A STOP FROM ~50MPH INCLUDING DOWNSHIFTING TO L1 AND USING THE EMERGENCY BRAKE RESULTED IN STOPPING MORE THAN 10 FEET OVER THE LINE. THE BRAKE PEDAL TRAVELS M…
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THE METAL LINE RUNNING FROM THE ABS/PROPORTIONING VALVE TO THE REAR BRAKES IS COMPLETELY RUSTED AND FAILED WHILE DRIVING HOME. THERE IS ALMOST NO BRAKING LEFT ON THE TRUCK. A STOP FROM ~50MPH INCLUDING DOWNSHIFTING TO L1 AND USING THE EMERGENCY BRAKE RESULTED IN STOPPING MORE THAN 10 FEET OVER THE LINE. THE BRAKE PEDAL TRAVELS MOST OF THE WAY TO THE FLOOR EVEN AFTER SEVERAL PUMPS. THIS IS THE SECOND FAILURE. TWO OF THE BRAKE LINES RUNNING TOWARDS THE FRONT OF THE VEHICLE FAILED SEVERAL YEARS AGO AND WERE REPLACED. *TT
NHTSA ODI #10427971
108,334 miles · Sep 26, 2011
Service Brakes, HydraulicCrash
THE BRAKE LINES ON MY 2001 CHEVROLET 2500HD HAVE COMPLETELY RUSTED OUT. I WAS BACKING OUT OF MY DRIVE WAY IN REVERSE AND WENT TO STEP ON THE BRAKE AN THE PEDAL WENT TO THE FLOOR. I ROLLED TO THE END OF MY DRIVEWAY, ACROSS THE STREET AND THROUGH MY NEIGHBOR'S FENCE. MY EMERGENCY BRAKE ONLY SLOWED MY SPEED IN REVERSE AND DID NO…
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THE BRAKE LINES ON MY 2001 CHEVROLET 2500HD HAVE COMPLETELY RUSTED OUT. I WAS BACKING OUT OF MY DRIVE WAY IN REVERSE AND WENT TO STEP ON THE BRAKE AN THE PEDAL WENT TO THE FLOOR. I ROLLED TO THE END OF MY DRIVEWAY, ACROSS THE STREET AND THROUGH MY NEIGHBOR'S FENCE. MY EMERGENCY BRAKE ONLY SLOWED MY SPEED IN REVERSE AND DID NOT STOP ME. THE BRAKE LINE ON THE DRIVER SIDE REAR IS RUSTED THROUGH AND BROKEN OFF AT THE FLANGE AT THE REAR WHEEL. INSPECTION SHOWS ALL OF THE BRAKE LINES ARE SEVERELY CORRODED AND WILL NEED TO BE REPLACED. I AM LUCKY THIS FAILURE DID NOT HAPPEN AT A MAJOR INTERSECTION OR IN AN EMERGENCY STOP SITUATION ON THE HIGHWAY. *TR
NHTSA ODI #10427505
Mileage unknown · Sep 9, 2011
Engine And Engine Cooling
BROKEN EXHAUST MANIFOLD BOLTS. *TR
NHTSA ODI #10424487
80,000 miles · Aug 22, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE BRAKE LINE WAS RUSTED AND CORRODED, CAUSING A BRAKE LINE FAILURE WHILE DRIVING 30 MPH. THE BRAKE WAS DEPRESSED INTO THE FLOORBOARD, CAUSING FUEL TO LEAK. THE VEHICLE WAS TAKEN TO A MECHANIC AFTER INSPECTING THE FAILURE AND THE CONTACT WAS INFORM…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE BRAKE LINE WAS RUSTED AND CORRODED, CAUSING A BRAKE LINE FAILURE WHILE DRIVING 30 MPH. THE BRAKE WAS DEPRESSED INTO THE FLOORBOARD, CAUSING FUEL TO LEAK. THE VEHICLE WAS TAKEN TO A MECHANIC AFTER INSPECTING THE FAILURE AND THE CONTACT WAS INFORMED THAT THE BRAKE LINES WOULD NEED REPLACING. THE MANUFACTURER WAS NOT CONTACTED. THE VIN WAS UNAVAILABLE. THE FAILURE MILEAGE WAS 80,000.
NHTSA ODI #10421003
94,000 miles · Aug 19, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 66 MPH THE VEHICLE SUDDENLY STALLED. THE FAILURE OCCURRED INTERMITTENTLY AT DIFFERENT SPEEDS. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC WAS UNABLE TO DETERMINE THE FAILURE. THE VEHICLE WAS NOT REPAIRED…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 66 MPH THE VEHICLE SUDDENLY STALLED. THE FAILURE OCCURRED INTERMITTENTLY AT DIFFERENT SPEEDS. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC FOR DIAGNOSTIC TESTING. THE MECHANIC WAS UNABLE TO DETERMINE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. NHTSA RECALL CAMPAIGN NUMBER: 07V521000 (ENGINE AND ENGINE COOLING) MAY BE RELATED TO THE FAILURE. THE MANUFACTURER WAS CONTACTED AND STATED THE VIN WAS NOT INCLUDED IN THE RECALL. THE APPROXIMATE FAILURE MILEAGE WAS 94,000.
NHTSA ODI #10420745
112,000 miles · Aug 9, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, APPROACHING A TRAFFIC STOP SIGNAL, THE BRAKE PEDAL WAS ENGAGED AND THE ENGINE STALLED WITHOUT WARNING. THE ENGINE RESTARTED AFTER WAITING A FEW MOMENTS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND T…
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TL* THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, APPROACHING A TRAFFIC STOP SIGNAL, THE BRAKE PEDAL WAS ENGAGED AND THE ENGINE STALLED WITHOUT WARNING. THE ENGINE RESTARTED AFTER WAITING A FEW MOMENTS. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR DIAGNOSIS AND THEY RECOMMENDED THE CRANKSHAFT POSITION SENSOR BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THERE WAS A RECALL RELATED TO THE SIMILAR DEFECT FOR THE MODEL YEAR 2001 SILVERADO, WHICH WAS UNDER NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). THE CONTACT PLANNED TO TAKE THE VEHICLE TO AN AUTHORIZED DEALER. THE MANUFACTURER WAS MADE AWARE OF THE PROBLEM. THE APPROXIMATE FAILURE MILEAGE WAS 112,000.
NHTSA ODI #10418147
68,658 miles · Aug 8, 2011
Service Brakes, HydraulicStructure
MY BRAKE LINES FAILED TWICE. ONCE IN 2008 AND TODAY 8/8/11. FAILURE DUE TO LINES RUSTING (CHEAP METAL TUBING) AND BURSTING WHEN BRAKES APPLIED. MECHANIC EVEN STATED HE COULDN'T BELIEVE THAT GM WAS USING INFERIOR METAL TUBING. HE SHOWED ME A PIECE OF THE LINE AND IT SNAPPED INTO TWO PIECES, I MEAN IT DIDN'T EVEN BEND IT JUST …
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MY BRAKE LINES FAILED TWICE. ONCE IN 2008 AND TODAY 8/8/11. FAILURE DUE TO LINES RUSTING (CHEAP METAL TUBING) AND BURSTING WHEN BRAKES APPLIED. MECHANIC EVEN STATED HE COULDN'T BELIEVE THAT GM WAS USING INFERIOR METAL TUBING. HE SHOWED ME A PIECE OF THE LINE AND IT SNAPPED INTO TWO PIECES, I MEAN IT DIDN'T EVEN BEND IT JUST SNAPPED. *TR
NHTSA ODI #10418048
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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