NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes complaints
13 reportsClear category filter180,000 miles · Feb 4, 2016
Service Brakes
TL* THE CONTACT OWNS A 2001 GMC 2500 HD. WHILE DRIVING APPROXIMATELY 35 MPH AND DEPRESSING THE BRAKE PEDAL, THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD AND FAILED TO STOP THE VEHICLE. THE CONTACT ENGAGED THE EMERGENCY BRAKE AND PLACED THE VEHICLE IN PARK. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO WAS DIAGNOSED THAT THE…
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TL* THE CONTACT OWNS A 2001 GMC 2500 HD. WHILE DRIVING APPROXIMATELY 35 MPH AND DEPRESSING THE BRAKE PEDAL, THE BRAKE PEDAL EXTENDED TO THE FLOORBOARD AND FAILED TO STOP THE VEHICLE. THE CONTACT ENGAGED THE EMERGENCY BRAKE AND PLACED THE VEHICLE IN PARK. THE VEHICLE WAS TOWED TO AN INDEPENDENT MECHANIC WHO WAS DIAGNOSED THAT THE DISTRIBUTOR BRAKE BLOCK HAD EXCESSIVE RUST AND NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 180,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10824168
Mileage unknown · Jan 27, 2016
Fuel/propulsion SystemService Brakes
I UNDERSTAND GM HAD A RECALL ON THE BRAKE BOOSTER SYTEM AND ALSO A FEW YEARS BACK A RECALL ON REPLACING ALL THE FUEL INJECTORS ON THE DIESEL ENGINE ! I AM ORINGINAL OWNER AT THE SAME ADDRESS WHEN I PURCHASED THE VEHICLE NEW ! I MISSED THE RECALLS BECAUSE I NEVER WAS NOTIFIED ! ITS SAD TO BUY A GM PRODUCT AND THEY DON'T ALERT ME …
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I UNDERSTAND GM HAD A RECALL ON THE BRAKE BOOSTER SYTEM AND ALSO A FEW YEARS BACK A RECALL ON REPLACING ALL THE FUEL INJECTORS ON THE DIESEL ENGINE ! I AM ORINGINAL OWNER AT THE SAME ADDRESS WHEN I PURCHASED THE VEHICLE NEW ! I MISSED THE RECALLS BECAUSE I NEVER WAS NOTIFIED ! ITS SAD TO BUY A GM PRODUCT AND THEY DON'T ALERT ME TO A RECALL ! WHAT'S UP WITH THIS?
NHTSA ODI #10822490
200,000 miles · Jul 21, 2014
Service Brakes
I CONNECTED MY CAMPER TO THE TRUCK. PROCEEDED TOWARD THE STREET DRIVING ON THE DRIVEWAY. I APPLIED THE BRAKE AND FELT A THUMP AT MY FOOT THAT'S WAS APPLYING THE BRAKE. THE BRAKE PEDAL WENT SLOWLY TO THE FLOOR. I WAS ABLE TO STOP, LOOKED UNDER THE TRUCK AND NOTICED BRAKE FLUID FLOWING FROM UNDERNEATH THE TRUCK. APON INSPECTION MY…
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I CONNECTED MY CAMPER TO THE TRUCK. PROCEEDED TOWARD THE STREET DRIVING ON THE DRIVEWAY. I APPLIED THE BRAKE AND FELT A THUMP AT MY FOOT THAT'S WAS APPLYING THE BRAKE. THE BRAKE PEDAL WENT SLOWLY TO THE FLOOR. I WAS ABLE TO STOP, LOOKED UNDER THE TRUCK AND NOTICED BRAKE FLUID FLOWING FROM UNDERNEATH THE TRUCK. APON INSPECTION MY BRAKE LINES WERE TOTALLY RUSTED. THE TRUCK IS IN THE REPAIR FACILITY AS I WRITE THE COMPLAINT. THE TRUCK BODY IS IN GREAT SHAPE EXCEPT FOR THE BRAKE LINES. BETTER REGULATIONS NEED TO BE MET REGARDING BRAKE LINE. PLEASE HELP. *TR
NHTSA ODI #10615136
68,000 miles · Oct 28, 2013
Service Brakes
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHEN TRAVELING UNDER 5 MPH, THE CONTACT STATED THAT THE PEDAL BEGAN TO PULSATE. THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND THE VEHICLE FAILED TO STOP IMMEDIATELY. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTUR…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHEN TRAVELING UNDER 5 MPH, THE CONTACT STATED THAT THE PEDAL BEGAN TO PULSATE. THE ANTI-LOCK BRAKE SYSTEM ACTIVATED AND THE VEHICLE FAILED TO STOP IMMEDIATELY. THE VEHICLE WAS TAKEN TO THE DEALER FOR INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 68,000.
NHTSA ODI #10549748
145,000 miles · Oct 17, 2013
Service Brakes
WE HAD DRIVEN ABOUT 90 MILES FROM OUR MAIN HOUSE TO OUR LAKE HOUSE ON FRIDAY NIGHT-BRAKES WERE FINE. SATURDAY MORNING WE BACKED THE SIERRA UP AND HOOKED UP THE BOAT TO THE HITCH. AFTER HOOKING UP THE BOAT WHILE WE WERE PULLING OUT OF THE DRIVEWAY THE BRAKE PEDAL WENT TO THE FLOOR. WE DROPPED THE BOAT AND DROVE THE SIERRA A FE…
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WE HAD DRIVEN ABOUT 90 MILES FROM OUR MAIN HOUSE TO OUR LAKE HOUSE ON FRIDAY NIGHT-BRAKES WERE FINE. SATURDAY MORNING WE BACKED THE SIERRA UP AND HOOKED UP THE BOAT TO THE HITCH. AFTER HOOKING UP THE BOAT WHILE WE WERE PULLING OUT OF THE DRIVEWAY THE BRAKE PEDAL WENT TO THE FLOOR. WE DROPPED THE BOAT AND DROVE THE SIERRA A FEW MILES TO THE STORE. WHILE AT THE STORE WE NOTICED A LEAK ABOVE THE GAS TANK. THE LEAK WAS BRAKE FLUID AND THE SIERRA TOOK AN ENTIRE BOTTLE OF BRAKE FLUID. WE DROVE IT THE FEW MILES BACK TO THE HOUSE AND GOT THE TRUCK TOWED HOME THE NEXT DAY. WHEN THE GAS TANK WAS DROPPED WE NOTICED RUST SO BAD ON THE FRAME THAT A SCREWDRIVER WENT THRU THE FRAME. THE FRAME COULD HAVE BUSTED APART RIGHT BEHIND THE CAB OF THE TRUCK. WE WERE EXTREMELY LUCKY THAT THERE WERE NO INJURIES. *TR
NHTSA ODI #10548323
35,870 miles · Sep 4, 2013
Service BrakesService Brakes, Hydraulic
I PARKED MY VEHICLE AND UPON EXITING OBSERVED FLUID DRIPS ON THE PAVEMENT. I TOUCHED AND SMELLED THE FLUID AND DETERMINED IT TO BE BRAKE FLUID. I THEN OBSERVED FLUID DRIPPING FROM BENEATH THE DRIVERS SIDE PASSENGER COMPARTMENT. I IMMEDIATELY CHECKED THE BRAKE FLUID RES. AND OBSERVED IT TO BE BELOW THE 1/2 POINT. I WAS APPROXIMAT…
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I PARKED MY VEHICLE AND UPON EXITING OBSERVED FLUID DRIPS ON THE PAVEMENT. I TOUCHED AND SMELLED THE FLUID AND DETERMINED IT TO BE BRAKE FLUID. I THEN OBSERVED FLUID DRIPPING FROM BENEATH THE DRIVERS SIDE PASSENGER COMPARTMENT. I IMMEDIATELY CHECKED THE BRAKE FLUID RES. AND OBSERVED IT TO BE BELOW THE 1/2 POINT. I WAS APPROXIMATELY 4 MILES FROM MY HOME AND DECIDED TO TAKE THE BACK ROAD WHICH REQUIRED LESS BRAKING. THE FLUID WAS STILL LEAKING UPON MY ARRIVAL HOME. I SHOULD NOTE THERE WAS NO FLUID LEAKING PRIOR TO DEPARTING MY RESIDENCE. I DID NOTICE THE PEDAL TRAVEL TO HAVE INCREASED AND THE FEEL TO BE SLIGHTLY SPONGY AS I DROVE DOWN A STEEP GRADE REQUIRING SIGNIFICANT BRAKING TO MAINTAIN THE 35 MPH LIMIT INTO HAVRE DE GRACE. THE VEHICLE (2001 GMC 2500HD) IS NOT DRIVEN MUCH AND MOSTLY FOR LOCAL (<15 MILES) TRAVEL. THE FRONT ROTORS AND CALIPERS HAVE BEEN REPLACED AND THE LINES BLED APPROXIMATELY 2 MONTHS AGO. THERE IS RUST EVIDENT ON THE BRAKE LINES. I MIGHT ARGUE THAT DUE TO THE VEHICLE AGE THIS IS TO BE EXPECTED; HOWEVER, THE EXTREMELY LOW MILEAGE IS EQUIVALENT TO APPROXIMATELY THREE (3) YEARS WORTH OF DRIVING. HAVING OWNED MANY VEHICLES, THIS IS THE FIRST TO HAVE HAD SUCH A PROBLEM. I NOW HAVE THE UNSCHEDULED EXPENSE OF REPLACING THE BRAKE LINES. I AM LUCKY NOT TO HAVE BEEN FURTHER FROM HOME WHERE I MIGHT HAVE EXPERIENCED TOTAL BRAKE FAILURE POSSIBLY CAUSING A CRASH.*JB
NHTSA ODI #10541828
35,000 miles · Dec 3, 2012
Service Brakes
TL* THE CONTACT OWNS A 2001 GMC 2500 HD. THE CONTACT STATED THAT HE NOTICED A HUGE PUDDLE OF BRAKE FLUID UNDER THE VEHICLE. UPON FURTHER INSPECTION, HE WAS ABLE TO DETERMINE THAT THERE WAS A HOLE IN THE BRAKE LINE AND IT APPEARED THAT THE BRAKE LINE WAS RUPTURED. IN ADDITION, THE CONTACT STATED THAT THE FRAME WAS COMPLETELY RUST…
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TL* THE CONTACT OWNS A 2001 GMC 2500 HD. THE CONTACT STATED THAT HE NOTICED A HUGE PUDDLE OF BRAKE FLUID UNDER THE VEHICLE. UPON FURTHER INSPECTION, HE WAS ABLE TO DETERMINE THAT THERE WAS A HOLE IN THE BRAKE LINE AND IT APPEARED THAT THE BRAKE LINE WAS RUPTURED. IN ADDITION, THE CONTACT STATED THAT THE FRAME WAS COMPLETELY RUSTED. THE VEHICLE WAS NOT TAKEN TO THE DEALER FOR DIAGNOSIS. THE CONTACT WANTED TO PURCHASE A STAINLESS STEEL BRAKE LINE AND INSTALL IT ON THE VEHICLE BUT HE STATED THAT IT SHOULD HAVE BEEN THE RESPONSIBILITY OF THE MANUFACTURER. THE FAILURE AND CURRENT MILEAGE WAS 35,000.
NHTSA ODI #10487197
130,000 miles · Sep 7, 2012
Service Brakes
TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE DRIVING, THE ABS WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT TURNED THE VEHICLE OFF HOWEVER, ABS CONTINUED OPERATING AND DRAINED THE BATTERY. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE THEY ADVISED THAT THERE WAS A SHORTAGE IN TH…
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TL* THE CONTACT OWNS A 2001 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE DRIVING, THE ABS WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE CONTACT TURNED THE VEHICLE OFF HOWEVER, ABS CONTINUED OPERATING AND DRAINED THE BATTERY. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE THEY ADVISED THAT THERE WAS A SHORTAGE IN THE ABS AND THAT THERE WERE NO FAILURES WITHIN THE BRAKING SYSTEM. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED. THE FAILURE MILEAGE WAS 130,000. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10474266
176,000 miles · Sep 5, 2012
Service Brakes
ALL THE BRAKE LINES ARE RUSTING THROUGH. *TR
NHTSA ODI #10473867
243,000 miles · Aug 31, 2012
Service Brakes
THE STEEL BRAKE LINES FROM THE MASTER CYLINDER BACK ALONG THE FRAME RAIL ON MY GMC 2500HD RUSTED THROUGH AND FAILED THE OTHER DAY, CAUSING PRESSURE AND FLUID LOSS, FORTUNATELY WHILE TRAVELING AT A SLOW SPEED CLOSE TO HOME. OF THE VARIOUS VEHICLES OWNED OVER THE YEARS, THIS IS THE FIRST TIME I HAVE HAD A STEEL BRAKE LINE RUST THR…
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THE STEEL BRAKE LINES FROM THE MASTER CYLINDER BACK ALONG THE FRAME RAIL ON MY GMC 2500HD RUSTED THROUGH AND FAILED THE OTHER DAY, CAUSING PRESSURE AND FLUID LOSS, FORTUNATELY WHILE TRAVELING AT A SLOW SPEED CLOSE TO HOME. OF THE VARIOUS VEHICLES OWNED OVER THE YEARS, THIS IS THE FIRST TIME I HAVE HAD A STEEL BRAKE LINE RUST THROUGH LIKE THIS. *TR
NHTSA ODI #10473200
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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