NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
10 reportsClear category filter31,000 miles · Jan 21, 2011
Service Brakes, Hydraulic
WHILE DRIVING I HAD MY BRAKES FAIL, THE PEDAL WENT TO THE FLOOR. IT WAS A RESULT OF A BROKEN STEEL BRAKE LINE UNDER THE DRIVERS SEAT. WHAT I FOUND WHEN I LOOKED UNDER THE TRUCK WAS ALL THE LINES THAT WENT TO THE ABS UNIT WERE BADLY RUSTED. ONE OF MY COWORKERS HAD THE SAME PROBLEM ON HIS 2001 GMC SUBURBAN BUT HE CHUCKED IT UP TO …
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WHILE DRIVING I HAD MY BRAKES FAIL, THE PEDAL WENT TO THE FLOOR. IT WAS A RESULT OF A BROKEN STEEL BRAKE LINE UNDER THE DRIVERS SEAT. WHAT I FOUND WHEN I LOOKED UNDER THE TRUCK WAS ALL THE LINES THAT WENT TO THE ABS UNIT WERE BADLY RUSTED. ONE OF MY COWORKERS HAD THE SAME PROBLEM ON HIS 2001 GMC SUBURBAN BUT HE CHUCKED IT UP TO ALL THE CAMPING TRIPS HE WENT ON WHERE HE LEFT HIS TRUCK PARKED OFF ROAD. MY TRUCK HOWEVER ONLY HAS 30,000 MILES AND IT HAS NEVER BEEN TAKEN OFF ROAD. I ALSO FLUSH THE BRAKE FLUID ONCE A YEAR AS PREVENTATIVE MAINTENANCE, SO THEY CAN'T CLAIM THEY RUSTED FROM THE INSIDE OUT. I DRIVE MY TRUCK EVERY DAY TO WORK ABOUT ONE MILE AWAY. MY DRIVEWAY IS PAVED AND THE PARKING LOT AT MY PLACE OF WORK IS ALSO PAVED. I DON'T PULL ANY HEAVY TRAILERS OR DO ANYTHING ELSE THAT WOULD CONTRIBUTE TO THE LINE FAILURE. I AM NOT PUTTING DOWN GM PRODUCTS BECAUSE ALL MY VEHICLES ARE GM VEHICLES INCLUDING TWO ANTIQUES. ONE A 1955 CHEVY WHICH HAD ORIGINAL BRAKE LINES UNTIL I DID A DISC BRAKE CONVERSION SEVERAL YEARS BACK. THE OTHER A 1970 CHEVELLE WHICH IS CURRENTLY A RESTORATION PROJECT BUT THE LINE ARE STILL ORIGINAL. THERE IS OBVIOUS A PROBLEM WITH THE MATERIAL USED TO MAKE THESE LINES. I WAS RESEARCHING THE PROBLEM ONLINE AND IT APPEARS THAT THERE ARE TO MANY OTHER PEOPLE WITH THE SAME PROBLEM. ALSO GM NO LONGER SELLS THE LINES WHICH MAKES IT A MUCH MORE TROUBLESOME REPAIR. I ALSO DON'T OWN A BOAT, JET SKI OR ANYTHING ELSE THAT WOULD REQUIRE ME TO PUT MY VEHICLE IN SALT WATER.
NHTSA ODI #10379149
61,580 miles · Aug 25, 2010
Service Brakes, Hydraulic
AFTER EXPERIENCING ABS BRAKING PROBLEMS ON MY 2001 GMC TRUCK MODEL NK3, I BECAME AWARE OF GM RECALL NO. 05068, 05V379000, WHICH THE LOCAL DEALER SAYS THIS ISSUE DOES NOT INVOLVE MY VEHICLE. FOR SAFETY REASONS, I DID REPAIR THE PROBLEM. *TR
NHTSA ODI #10351751
175,000 miles · Nov 25, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 GMC SIERRA 3500 DIESEL. THE CONTACT STATED THAT THE ANTILOCK BRAKING SYSTEM WOULD ACTIVATE WHILE STOPPING FROM 50 MPH. THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE MECHANIC STATED THAT THE REPAIRS COULD COST SLIGHTLY LESS THAN $1,000. THE VE…
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TL*THE CONTACT OWNS A 2001 GMC SIERRA 3500 DIESEL. THE CONTACT STATED THAT THE ANTILOCK BRAKING SYSTEM WOULD ACTIVATE WHILE STOPPING FROM 50 MPH. THE VIN WAS EXCLUDED FROM NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE MECHANIC STATED THAT THE REPAIRS COULD COST SLIGHTLY LESS THAN $1,000. THE VEHICLE HAS NOT BEEN REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE LESS THAN 175,000.
NHTSA ODI #10249790
35,000 miles · May 20, 2008
Service Brakes, HydraulicWheels
TL*THE CONTACT OWNS A 2001 GMC SIERRA C3. WHEN THE VEHICLE APPROACHES A STOP, THE ABS GRAB AND MAKE IT HARDER TO STOP THE VEHICLE. THE CONTACT STATED THAT THIS FAILURE OCCURRED ONE YEAR EARLIER WHILE DRIVING AT ANY SPEED. THE EMERGENCY BRAKE ALSO FAILED, WHICH CAUSED THE VEHICLE TO FAIL INSPECTION. A LOCAL MECHANIC INFORMED …
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TL*THE CONTACT OWNS A 2001 GMC SIERRA C3. WHEN THE VEHICLE APPROACHES A STOP, THE ABS GRAB AND MAKE IT HARDER TO STOP THE VEHICLE. THE CONTACT STATED THAT THIS FAILURE OCCURRED ONE YEAR EARLIER WHILE DRIVING AT ANY SPEED. THE EMERGENCY BRAKE ALSO FAILED, WHICH CAUSED THE VEHICLE TO FAIL INSPECTION. A LOCAL MECHANIC INFORMED HIM THAT THE WHEEL SENSORS POSSIBLY NEEDED TO BE CLEANED OR REPLACED. THE MANUFACTURER STATED THAT THE VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE REPAIRS WOULD COST APPROXIMATELY $1,500. THE FAILURE MILEAGE WAS 35,000 AND CURRENT MILEAGE WAS 47,000. UPDATED 06/25/08. *LJ UPDATED 06/25/08
NHTSA ODI #10228266
118,800 miles · Dec 20, 2007
Service Brakes, Hydraulic
FRONT RIGHT ABS WHEEL SENSOR FAILED 2001 SIERRA TRUCK CAUSING SUDDEN AND UNEXPECTED PULLING TO THE RIGHT AS THE ABS SYSTEM ENGAGED AT LOW SPEED. TRUCK IS SUBJECT TO A GMC REGIONAL RECALL (RECALL ID# 58438 ) BUT GMC HAS REFUSED TO FIX PROBLEM STATING THE TRUCK WAS NOT IN THE RECALL DATABASE. TRUCK WAS SHIPPED BY DEALER TO MAS…
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FRONT RIGHT ABS WHEEL SENSOR FAILED 2001 SIERRA TRUCK CAUSING SUDDEN AND UNEXPECTED PULLING TO THE RIGHT AS THE ABS SYSTEM ENGAGED AT LOW SPEED. TRUCK IS SUBJECT TO A GMC REGIONAL RECALL (RECALL ID# 58438 ) BUT GMC HAS REFUSED TO FIX PROBLEM STATING THE TRUCK WAS NOT IN THE RECALL DATABASE. TRUCK WAS SHIPPED BY DEALER TO MASS IN 2002 WHERE IT WAS REGISTERED UNTIL SEPTEMBER 2005. *TR
NHTSA ODI #10212439
45,000 miles · Jan 5, 2006
Service Brakes, Hydraulic
I HAVE A 2001 GMC SIERRA 3500. I HAVE THE ANTI-LOCK BRAKE PROBLEM DESCRIBED IN NHTSA ID NUMBER 05V37900. THERE IS NO QUESTION THAT THE ANTI-LOCK BRAKES ENGAGE AT SLOW SPEEDS. I HAVE CALLED GM ABOUT IT, E-MAILED THEM ABOUT IT, STAY IN TOUCH WITH THE DEALER AND EVERYONE SAYS MY VEHICLE IS NOT AFFECTED BY THE RECALL BUT IT IS SH…
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I HAVE A 2001 GMC SIERRA 3500. I HAVE THE ANTI-LOCK BRAKE PROBLEM DESCRIBED IN NHTSA ID NUMBER 05V37900. THERE IS NO QUESTION THAT THE ANTI-LOCK BRAKES ENGAGE AT SLOW SPEEDS. I HAVE CALLED GM ABOUT IT, E-MAILED THEM ABOUT IT, STAY IN TOUCH WITH THE DEALER AND EVERYONE SAYS MY VEHICLE IS NOT AFFECTED BY THE RECALL BUT IT IS SHOULD BE FOR SURE. MY FRIENDS WITH 1500'S AND 2500'S HAVE ALL HAD IT REPAIRED BUT I GOT NO NOTICE. EVERY PLACE I CHECK SAYS IT SHOULD BE ON THE RECALL LIST BUT NOT WHEN I USE THE VIN ON THE GM SITE. *JB
NHTSA ODI #10146967
60,000 miles · Oct 28, 2005
Service Brakes, Hydraulic
DT: THE CONTACT STATED THERE WAS RUST ON THE ABS SENSOR ON THE FRONT AXLE. THE VEHICLE WAS TAKEN TO A MECHANIC, AND THEY TOOK THE FRONT HUBS OFF AND CLEANED OUT THE RUST. THE TWO ABS SENSORS WERE ALSO REPLACED. THE VEHICLE WAS WORKING PROPERLY AT THIS TIME. THERE WAS RECALL, 05V379000, AND THIS CONSUMER EXPERIENCED THE SAM…
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DT: THE CONTACT STATED THERE WAS RUST ON THE ABS SENSOR ON THE FRONT AXLE. THE VEHICLE WAS TAKEN TO A MECHANIC, AND THEY TOOK THE FRONT HUBS OFF AND CLEANED OUT THE RUST. THE TWO ABS SENSORS WERE ALSO REPLACED. THE VEHICLE WAS WORKING PROPERLY AT THIS TIME. THERE WAS RECALL, 05V379000, AND THIS CONSUMER EXPERIENCED THE SAME FAILURE. ACCORDING TO GENERAL MOTORS, THIS VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO VIN. *AK THE ROTORS WERE REPLACD DUE TO RUST. UPDATED 11/29/05. *JB
NHTSA ODI #10141121
60,000 miles · Oct 18, 2005
Service Brakes, Hydraulic
BRAKE PEDAL WILL GO HARD AT LOW SPEED AND NOT BRAKE. MY DEALER SAID IT IS THE WHEEL SPEED SENSOR AND HE CLEANED IT. GMC HAS A RECALL FOR THIS PROBLEM ON THEIR SUVS AND SOME PICKUPS BUT NOT FOR MY TRUCK. *JB
NHTSA ODI #10140062
5,000 miles · May 9, 2005
Service Brakes, Hydraulic
SHORTLY AFTER BUYING THIS TRUCK, I WAS DOING LESS THAN 20 MPH SLOWING DOWN TO STOP AT A LIGHT. I HIT A SMALL DUMP THEN I HEARD THE ABS COME ON AND I ROLL RIGHT THROUGH THE RED LIGHT. THE DEALER TOLD ME IT MUST BE MY DRIVING. AFTER SEVERAL OTHER SIMILAR SITUATIONS, I HAD THE ABS DISCONECTED AND HAVE NOT HAD ANY OTHER FAILURES.
NHTSA ODI #10120267
8,500 miles · Apr 3, 2003
Service Brakes, Hydraulic
FAILURE OCCURS BELOW 15MPH WHILE DOING A NORMAL STOP ON BOTH WET AND DRY ROAD (WITH NO CONTAMINANTS ON THE ROAD TO AFFECT BRAKING). THIS HAS HAPPENED EIGHT TIMES IN THE 8500 MILES I HAVE DRIVEN THE VEHICLE, WITH THE EIGHTH TIME RESULTING IN AN ACCIDENT. EVENT COURSE IS THAT I AM COMING TO A NORMAL STOP, AND WHILE MY FOOT IS …
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FAILURE OCCURS BELOW 15MPH WHILE DOING A NORMAL STOP ON BOTH WET AND DRY ROAD (WITH NO CONTAMINANTS ON THE ROAD TO AFFECT BRAKING). THIS HAS HAPPENED EIGHT TIMES IN THE 8500 MILES I HAVE DRIVEN THE VEHICLE, WITH THE EIGHTH TIME RESULTING IN AN ACCIDENT. EVENT COURSE IS THAT I AM COMING TO A NORMAL STOP, AND WHILE MY FOOT IS ON THE BRAKE I PUSH SLIGHTLY MORE ON THE PEDAL IN AN INSTANCE WHERE A LITTLE MORE BRAKE IS NEEDED TO STOP BEFORE WHERE I HAD ORIGINALLY PLANNED. IMMEDIATELY THE ABS KICKS IN (I CAN HEAR A WHIRRING SOUND BUT THE BRAKES PEDAL DOES NOT FLUCTUATE), AND I LOOSE ABOUT 50% OF THE BRAKING POWER RIGHT WHEN I NEED MORE TO STOP SOONER. OBVIOUSLY THE VEHICLE KEEPS MOVING FORWARD PAST WHERE I NEED IT TO STOP. THIS VEHICLE IS OWNED BY SEATTLE PUBLIC SCHOOLS AND IS A MAINTENANCE VEHICLE. THE MAINTENANCE SHOP AND DEALER CLAIM THAT THERE IS NOTHING WRONG WITH THE VEHICLE, AND I HAVE REFUSED TO DRIVE IT. REAR WHEEL BEARING SEALS HAVE BEEN REPLACED. I HAVE BEEN DRIVING OVER 40 YEARS AND HAVE NEVER EXPERIENCED THIS TYPE OF RESPONSE FROM ANY OTHER VEHICLE I HAVE DRIVEN. / PLEASE NOTE ON YOUR WEB PAGE, I COULD NOT MAKE A SELECTION FOR ANYTHING BUT A 'PASSENGER VEHICLE'. THIS IS A VAN.
NHTSA ODI #10013878
NHTSA investigations
2EA06016 · 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.
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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