NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
300 reports95,000 miles · Mar 13, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE APPROACHING A STOP BETWEEN 1-5 MPH, THE VEHICLE ROLLS BEFORE STOPPING COMPLETELY. THE ANTILOCK BRAKING SYSTEM ATTEMPTS TO ENGAGE AND CAUSES THE VEHICLE TO JERK. THE FAILURE BEGAN INTERMITTENTLY, BUT NOW OCCURS 90% OF THE TIME. THE DEALER STATED THAT THE BRAKE PADS…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE APPROACHING A STOP BETWEEN 1-5 MPH, THE VEHICLE ROLLS BEFORE STOPPING COMPLETELY. THE ANTILOCK BRAKING SYSTEM ATTEMPTS TO ENGAGE AND CAUSES THE VEHICLE TO JERK. THE FAILURE BEGAN INTERMITTENTLY, BUT NOW OCCURS 90% OF THE TIME. THE DEALER STATED THAT THE BRAKE PADS NEEDED TO BE REPLACED. THE REAR BRAKE PADS WERE REPLACED, BUT THE FAILURE PERSISTS. THE CURRENT MILEAGE WAS 103,000 AND FAILURE MILEAGE WAS 95,000.
NHTSA ODI #10221006
Mileage unknown · Mar 9, 2008
Service Brakes, Hydraulic
SAFETY RECALL FOR LOW SPEED ABS ACTIVATION 2001 CHEVY SILVERADO 2500HD. *TR
NHTSA ODI #10220506
Mileage unknown · Feb 19, 2008
Electrical SystemFuel System, Gasoline
THE FUEL GAUGE WILL SHOW EMPTY EVEN IF THE TANK IS FULL. IT WILL GO FROM BELOW EMPTY AND THE LOW FUEL LIGHT WILL COME ON AND THEN IF YOU ROCK THE VEHICLE BACK AND FORTH IT WILL READ THE PROPER AMOUNT. *TR
NHTSA ODI #10218489
50,000 miles · Jan 23, 2008
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE STALLED OVER A DOZEN TIMES. THE FAILURE WAS NOTICED WHILE DRIVING 70 MPH. THE CHECK ENGINE LIGHT ILLUMINATED PRIOR TO THE FAILURE. OCCASIONALLY, THE VEHICLE WOULD JUST JERK AND OTHER TIMES IT WOULD COMPLETELY SHUT DOWN. THE CONTACT H…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE STALLED OVER A DOZEN TIMES. THE FAILURE WAS NOTICED WHILE DRIVING 70 MPH. THE CHECK ENGINE LIGHT ILLUMINATED PRIOR TO THE FAILURE. OCCASIONALLY, THE VEHICLE WOULD JUST JERK AND OTHER TIMES IT WOULD COMPLETELY SHUT DOWN. THE CONTACT HAD TO WAIT APPROXIMATELY 5-10 MINUTES BEFORE THE VEHICLE WOULD RESTART. THE DEALER STATED THAT HIS VIN WAS EXCLUDED FROM THE CRANKSHAFT RECALL. THE PURCHASE DATE AND RECALL NUMBER WERE UNKNOWN. THE CURRENT MILEAGE WAS 73,000 AND FAILURE MILEAGE WAS APPROXIMATELY 50,000. UPDATED 02-19-08 *BF THE CONSUMER STATED THE PROBLEM STARTED AT 50,000 MILES AND THROUGH TO 73,000 CURRENTLY. UPDATED 02/14/08 *TR
NHTSA ODI #10215776
37,541 miles · Jan 18, 2008
Engine And Engine Cooling
MY 2001 CHEVROLET SILVERADO HD2500 P/U STARTED HAVING INTERMITTENT STALLING PROBLEMS IN JULY 2007. THE ENGINE WOULD DIE AND IT WOULD TAKE A FEW MINUTES TO RESTART. FINALLY IN SEPT 2007 IT DIED ON THE FREEWAY WHEN I WAS TRAVELING AT OVER 65 MPH. THE POWERSTEERING STOPPED AND THE POWER BRAKE ASSIST STOPPED. I WAS LUCKY THAT I D…
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MY 2001 CHEVROLET SILVERADO HD2500 P/U STARTED HAVING INTERMITTENT STALLING PROBLEMS IN JULY 2007. THE ENGINE WOULD DIE AND IT WOULD TAKE A FEW MINUTES TO RESTART. FINALLY IN SEPT 2007 IT DIED ON THE FREEWAY WHEN I WAS TRAVELING AT OVER 65 MPH. THE POWERSTEERING STOPPED AND THE POWER BRAKE ASSIST STOPPED. I WAS LUCKY THAT I DIDN'T HAVE A HIGH SPEED ACCIDENT. THE TRUCK WAS TAKEN TO THE LOCAL CHEVROLET DEALER AND THEY REPLACED THE CRANKSHAFT POSITION SENSOR AND CHARGED ME $420.99. THE VEHICLE ONLY HAD 37,546 MILES ON IT AT THE TIME BUT WAS OUT OF WARRANTY. I HAVE NOT HAD ANY FURTHER PROBLEMS SINCE THE REPAIR. I CONTACTED CHEVROLET ABOUT THEIR RECALL # 06083 NHTSA ID#07V521000 AND THEY ADVISED THAT MY VEHICLE DID NOT QUALIFY. I DON'T UNDERSTAND WHY SINCE IT IS THE SAME 8.1 ENGINE AND YEAR/MODEL. IF YOU GO ON THE GM-TRUCK.COM WEB SITE YOU WILL SEE THAT THIS IS AVERY COMMON AND DANGEROUS PROBLEM WITH THE 2001 8.1 GM ENGINES. *TR
NHTSA ODI #10215380
65,000 miles · Jan 9, 2008
Power Train
I WAS DRIVING UP AN UNPAVED HILL THAT WAS SLIPPERY FROM SNOW BUT HAD BEEN PLOWED. IT WAS NIGHT TIME AND THE HILL IS STEEP WITH LOTS OF SHARP CURVES. ON MY WAY UP I NOTICED MY STEERING BECAME STIFF. I CAME TO A POINT WHERE I WAS NOT MAKING ANY MORE FORWARD PROGRESS AND HAD TO STOP.(MY TIRES ARE NOT THE BEST) WHEN I HIT THE BRAKES…
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I WAS DRIVING UP AN UNPAVED HILL THAT WAS SLIPPERY FROM SNOW BUT HAD BEEN PLOWED. IT WAS NIGHT TIME AND THE HILL IS STEEP WITH LOTS OF SHARP CURVES. ON MY WAY UP I NOTICED MY STEERING BECAME STIFF. I CAME TO A POINT WHERE I WAS NOT MAKING ANY MORE FORWARD PROGRESS AND HAD TO STOP.(MY TIRES ARE NOT THE BEST) WHEN I HIT THE BRAKES I THEN REALIZED I DIDN'T HAVE ANY. I WAS ABLE TO GET THE TRUCK INTO REVERSE BEFORE I STARTED ROLLING BACKWARDS TO FAST AND SAFELY MANEUVER BACK DOWN THE HILL BACKWARDS WITHOUT COMPLICATIONS. I FEEL THIS SHOULD FALL UNDER NHTSA CAMPAIGN ID NUMBER 05V005000. *TR
NHTSA ODI #10214307
77,858 miles · Jan 8, 2008
Service Brakes, Hydraulic
CHEVROLET HAS ISSUED A RECALL FOR LOW SPEED ANTI-LOCK BRAKE FAILURE FOR 2001 MODEL SILVERADOS. THE RECALL INCLUDES ALL RUST BELT STATES. I HAVE BEEN HAVING FAILURE OF THE ANTI-LOCK BRAKING SYSTEM IN SPEEDS OF 5 MPH OR BELOW. THEY CLAIM THAT MY VEHICLE IS NOT INCLUDED IN THIS RECALL, BUT THEY ADMIT THEY ARE HAVING PROBLEMS WIT…
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CHEVROLET HAS ISSUED A RECALL FOR LOW SPEED ANTI-LOCK BRAKE FAILURE FOR 2001 MODEL SILVERADOS. THE RECALL INCLUDES ALL RUST BELT STATES. I HAVE BEEN HAVING FAILURE OF THE ANTI-LOCK BRAKING SYSTEM IN SPEEDS OF 5 MPH OR BELOW. THEY CLAIM THAT MY VEHICLE IS NOT INCLUDED IN THIS RECALL, BUT THEY ADMIT THEY ARE HAVING PROBLEMS WITH THE SAME EQUIPMENT THAT IS ON MY TRUCK. HOW CAN THEY ISSUE A RECALL AND NOT INCLUDE ALL MODELS THAT HAVE THIS FAULTY EQUIPMENT. GM HAS AGREED WITH ME THAT MY PROBLEM IS THE SAME AS WHAT THE RECALL WAS ISSUED FOR, BUT THEY REFUSE TO PAY FOR THE REPAIR, BECAUSE "YOUR VIN IS NOT INCLUDED IN THE RECALL GROUP." THEY STATE THAT I HAVE NOT HAD REGULAR SERVICE DONE ON MY VEHICLE AT A DEALERSHIP, AND THEY WILL NOT COVER IT FOR THAT REASON. MY TRUCK IS IN EXCELLENT SHAPE, AND WELL CARED FOR, JUST NOT A DEALERSHIP. THERE IS NOWHERE IN THE OWNERS MANUAL THAT STATES THAT YOU MUST HAVE YOUR VEHICLE SERVICED AT A DEALERSHIP IN ORDER TO RECEIVE THE PROPER REPAIRS WHICH HAVE BEEN DEEMED NOT SAFE. *TR
NHTSA ODI #10214197
70,000 miles · Dec 28, 2007
Engine And Engine Cooling
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE FAILED TO START. WHILE DRIVING APPROXIMATELY 50 MPH, THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL AND THEN THE VEHICLE STALLED. THE VEHICLE IMMEDIATELY RESTARTED AUTOMATICALLY. A LOCAL MECHANIC STATED THAT THE CRANK S…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE FAILED TO START. WHILE DRIVING APPROXIMATELY 50 MPH, THE BATTERY WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL AND THEN THE VEHICLE STALLED. THE VEHICLE IMMEDIATELY RESTARTED AUTOMATICALLY. A LOCAL MECHANIC STATED THAT THE CRANK SHAFT SENSOR CAUSED THE FAILURE. THE VEHICLE WAS REPAIRED AND THERE HAD BEEN NO FURTHER OCCURRENCES. THE DEALER STATED THAT HIS VIN WAS NOT INCLUDED IN NHTSA CAMPAIGN ID NUMBER 07V521000 (ENGINE AND ENGINE COOLING). HE FILED A FORMAL COMPLAINT WITH THE MANUFACTURER. THE CURRENT AND FAILURE MILEAGES WERE 70,000. UPDATED 02-14-08 *BF
NHTSA ODI #10213076
97,848 miles · Nov 26, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE CHANGING THE OIL, THE CONTACT NOTICED THAT THE BRAKE LINE WAS LEAKING. HE REPLACED THE BRAKE LINE. THE DEALER HAS NOT BEEN NOTIFIED. THE CURRENT AND FAILURE MILEAGES WERE 97,848. THE CONSUMER REPLACED THE BRAKE LINES WITH STAINLESS STEEL DUE TO THE CORROSION OF T…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. WHILE CHANGING THE OIL, THE CONTACT NOTICED THAT THE BRAKE LINE WAS LEAKING. HE REPLACED THE BRAKE LINE. THE DEALER HAS NOT BEEN NOTIFIED. THE CURRENT AND FAILURE MILEAGES WERE 97,848. THE CONSUMER REPLACED THE BRAKE LINES WITH STAINLESS STEEL DUE TO THE CORROSION OF THE LINES. UPDATED 12/12/07
NHTSA ODI #10209947
22,990 miles · Nov 21, 2007
Engine And Engine Cooling
TRUCK DIED AT 60 MPH. LOST ALL POWER FOR FEW SECONDS THEN STARTED AGAIN. THEN WOULD NOT START FOR 2 WEEKS. FINALLY GOT IT TO START AND PUT ON SCANNER IT SAID TO REPLACE CRANKSHAFT POSITION SENSOR. REPLACED IT MYSELF AND TRUCK RUNNING GREAT.MC *TR
NHTSA ODI #10209676
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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