IllustrationSAFETY RECALL FOR LOW SPEED ABS ACTIVATION 2001 CHEVY SILVERADO 2500HD. *TR
2001 Chevrolet Silverado 2500
Owner reports · Recalls · Investigations
More warning signs than most Silverado 2500 years
Owner complaints for the 2001 Chevrolet Silverado 2500 are substantially higher than the model-year median of 81.
About this comparison →How this year compares
Owner complaints by model year
Compare all Silverado 2500 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
All reported categories
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
270–25K
3725–50K
5550–75K
5275–100K
53100–150K
31150K+
255 reports with mileage · 45 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Service Brakes, Hydraulic. Review the 78 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Engine And Engine Cooling. Review the 62 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Service Brakes. Review the 55 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
11 crash reports3 fire reports4 injury reports
Service Brakes, Hydraulic complaints
78 reportsCHEVROLET 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
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
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE JERKS WHEN THE BRAKES ARE DEPRESSED. THERE ARE NO WARNING INDICATORS. THE DEALER DIAGNOSED THE CAUSE OF FAILURE AS THE ABS SYSTEM. THE CONTACT REFERENCED RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE DEALER STATED THAT THE VIN FOR THE VEHICLE…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE VEHICLE JERKS WHEN THE BRAKES ARE DEPRESSED. THERE ARE NO WARNING INDICATORS. THE DEALER DIAGNOSED THE CAUSE OF FAILURE AS THE ABS SYSTEM. THE CONTACT REFERENCED RECALL # 05V379000 (SERVICE BRAKES, HYDRAULIC:ANTILOCK). THE DEALER STATED THAT THE VIN FOR THE VEHICLE DOES NOT QUALIFY FOR THE RECALL. THE ENGINE SIZE WAS UNKNOWN. THE CURRENT MILEAGE IS 113,000 AND FAILURE MILEAGE WAS 100,000. LEFT MESSAGE 10/16/07 . * LJ
TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE WASEXPERIENCING ABS FAILURE, AND FOUND RECALL # 05V379000 FOR THE SAME FAILURE. WHILE DRIVING AT ANY SPEED THE CONTACT SENSED VIBRATION IN THE BRAKE PEDAL WHEN IT WAS DEPRESSED, AND EXTENDED STOPPING DISTANCE. THE CONTACT STATED TH…
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TL*THE CONTACT OWNS A 2001 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT THE VEHICLE WASEXPERIENCING ABS FAILURE, AND FOUND RECALL # 05V379000 FOR THE SAME FAILURE. WHILE DRIVING AT ANY SPEED THE CONTACT SENSED VIBRATION IN THE BRAKE PEDAL WHEN IT WAS DEPRESSED, AND EXTENDED STOPPING DISTANCE. THE CONTACT STATED THAT THE BRAKE FLUID WAS CHECKED AND LOOKED SATISFACTORY. THE VIBRATIONS PRODUCED A RUMBLING NOISE THAT INCREASED THE HARDER THE BRAKE PEDAL WAS DEPRESSED. THE INSTRUMENT PANEL DID NOT INDICATE WHEN THE ABS ACTIVATED. THE CURRENT MILEAGE WAS 130,450, AND FAILURE MILEAGE WAS 129,700.*AK
FOUND FLUID ON FLOOR UNDERNEATH MOTOR AREA. CHECKED POWER STEERING RESERVOIR AND FOUND IT TO BE FULL. I FOUND I HAD LOST POWER STEERING, WHEN I PUT VEHICLE IN GEAR TO MOVE OUT OF GARAGE AREA, I FOUND THAT I HAD ALSO LOST MY BRAKES. (PEDAL WENT TO THE FLOOR) I WAS THANKFUL THAT I WAS NOT ON THE HIGHWAY PULLING A TRAILER AT THIS …
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FOUND FLUID ON FLOOR UNDERNEATH MOTOR AREA. CHECKED POWER STEERING RESERVOIR AND FOUND IT TO BE FULL. I FOUND I HAD LOST POWER STEERING, WHEN I PUT VEHICLE IN GEAR TO MOVE OUT OF GARAGE AREA, I FOUND THAT I HAD ALSO LOST MY BRAKES. (PEDAL WENT TO THE FLOOR) I WAS THANKFUL THAT I WAS NOT ON THE HIGHWAY PULLING A TRAILER AT THIS TIME. NO POWER STEERING AND NO BRAKES. I CONTACTED POWER CHEVROLET IN VALENCIA AND THEY TOLD ME NOT TO DRIVE THE VEHICLE BUT TO HAVE IT TOWED TO THEIR LOCATION. WHEN THE VEHICLE ARRIVED AT THE DEALERSHIP AND WAS REMOVED FROM THE TOW TRUCK, A SERVICE REPRESENTATIVE WAS ABLE TO MOVE THE VEHICLE. HE STATED THAT IT HAD BOTH POWER STEERING AND BRAKES. THE SERVICE REPRESENTATIVE DROVE THE TRUCK AROUND THE LOT SEVERAL TIMES TO DEMONSTRATE THAT EVERYTHING WAS WORKING FINE. AT THE CONCLUSION OF HIS LAST TRIP AROUND THE LOT, THE BRAKE PEDAL WENT TO THE FLOOR. I RECEIVED A CALL FROM THE SERVICE DEPARTMENT SUGGESTING THAT I CHANGE THE POWER STEERING PUMP. I WAS NOT COMFORTABLE ABOUT THIS SUGGESTION SINCE I HAD ALSO LOST MY BRAKES. THE ONE COMPONENT PART THAT AFFECTS BOTH POWER STEERING AND BRAKES IS THE HYDRO-BOOSTER. I HAD THEM REPLACE THE POWER STEERING PUMP AND HYRO-BOOSTER. THEY CLAIM THERE HAVE NOT BEEN ANY RECALLS ON EITHER OF THESE PARTS. *JB
ANTI LOCK BRAKES ARE ACTIVATING UNDER LOW STOPPING SPEED CAUSING AN INCREASE IN STOPPING DISTANCE. BROUGHT VEHICLE TO RON CURRIER CHEVROLET IN SOMERWORTH NH. WAS TOLD THE ANTI LOCK BRAKE SENSOR IS OUT OF CALIBRATION. TRIED TO RESOLVE THE PROBLEM WITH CHEVEROLET AS VEHICLE HAD ONLY 25,400 MILES WHEN INCIDENT FIRST OCCURRED. WAS T…
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ANTI LOCK BRAKES ARE ACTIVATING UNDER LOW STOPPING SPEED CAUSING AN INCREASE IN STOPPING DISTANCE. BROUGHT VEHICLE TO RON CURRIER CHEVROLET IN SOMERWORTH NH. WAS TOLD THE ANTI LOCK BRAKE SENSOR IS OUT OF CALIBRATION. TRIED TO RESOLVE THE PROBLEM WITH CHEVEROLET AS VEHICLE HAD ONLY 25,400 MILES WHEN INCIDENT FIRST OCCURRED. WAS TOLD OF OTHER VEHICLES COVERED UNDER A RECALL, BUT MY VEHICLE WAS NOT INCLUDED. CURRENTLY THE VEHICLE HAS NOT BEEN REPAIRED. *JB
UNDER LOW BRAKING MY ANTI-LOCK BRAKES ACTIVATED CAUSING MY VEHICLE TO HAVE LOW BRAKING ABILITY AND CAUSING THE VEHICLE TO TAKE LONGER TO COME TO A COMPLETE STOP. *JB
DT*: THE CONTACT STATED WHILE APPLYING BRAKE PRESSURE AT ANY SPEED, THE ANTILOCK BRAKES ACTIVATED WITHOUT WARNING AND THERE WAS AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS INSPECTED BY A DEALER WHO DETERMINED THE WHEEL SENSORS WERE INOPERATIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS EXPOSED TO EXCESSIVE ROAD SALTS DURI…
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DT*: THE CONTACT STATED WHILE APPLYING BRAKE PRESSURE AT ANY SPEED, THE ANTILOCK BRAKES ACTIVATED WITHOUT WARNING AND THERE WAS AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS INSPECTED BY A DEALER WHO DETERMINED THE WHEEL SENSORS WERE INOPERATIVE AND NEEDED TO BE REPLACED. THE VEHICLE WAS EXPOSED TO EXCESSIVE ROAD SALTS DURING THE WINTER MONTHS, BUT NO CORROSION WAS NOTED. THERE WAS A NHTSA RECALL, # 05V379000, REGARDING THE ANTILOCK BRAKES. THE VEHICLE WAS NOT INCLUDED IN THE RECALL DUE TO THE VIN. THE MANUFACTURER WAS ALERTED. UPDATED 10/25/2006 - *NM
DT*: THE CONTACT STATED WHILE APPROACHING A STOP, DRIVING 5 MPH AND APPLYING THE BRAKES, THE ANTI- LOCK BRAKE SYSTEM ACTIVATED. THIS CAUSED AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO A DEALER. UPON INSPECTION THE SPEED SENSOR HUB WAS CORRODED DUE TO ROAD SALT AND WAS REPLACED. THERE IS A NHTSA RECALL, # 05V3790…
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DT*: THE CONTACT STATED WHILE APPROACHING A STOP, DRIVING 5 MPH AND APPLYING THE BRAKES, THE ANTI- LOCK BRAKE SYSTEM ACTIVATED. THIS CAUSED AN INCREASED STOPPING DISTANCE. THE VEHICLE WAS TAKEN TO A DEALER. UPON INSPECTION THE SPEED SENSOR HUB WAS CORRODED DUE TO ROAD SALT AND WAS REPLACED. THERE IS A NHTSA RECALL, # 05V379000, REGARDING THE SERVICE BRAKES, ANTI-LOCK. THE CONSUMERS VEHICLE IDENTIFICATION NUMBER WAS NOT INCLUDED IN THE RECALL. THE ALTERNATOR FAILED. THE ROTORS AND BRAKES HAD TO BE REPLACED DUE TO THE ROTORS RUSTING FROM THE INSIDE. THE ROTORS COULD NOT BE TURNED BECAUSE THEY WERE HEAVILY RUSTED. THE LEFT POWER WINDOW FAILED, THE MANUFACTURER USED A STEEL CABLE FOR THE ASSEMBLY, WHICH ALLOWED WATER TO SEEP IN WHICH CAUSED CORROSION. THE LEFT REAR OUTSIDE AXLE WAS LEAKING. THE A/C IDLER PULLEY AND TENSIONER WAS MAKING A LOUD NOISE. THE RIGHT POWER WINDOW FAILED. THE TIRES WERE CRACKING ALONG THE EDGES CLOSE TO THE RIM. GREASE LEAKED OUT FROM THE CV JOINT. THE REAR OIL SEAL WAS LEAKING. THE RIMS WERE DELAMINATING. THE CD WOULD NOT EJECT FROM THE PLAYER. THE IGNITION SWITCH WAS REPLACED, THE PASSENGER WINDSHIELD WIPER WAS LOOSE, THE MULTI-FUNCTION SWITCH WAS REPLACED. THE ACCELERATOR WOULD STICK SOMETIMES AND THE DRIVER SIDE MIRROR WAS BROKEN. UPDATED 07/10/06. *JB
Official recalls
0No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
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.