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2002 GMC Sierra 2500

Owner reports · Recalls · Investigations

More warning signs than most Sierra 2500 years

Owner complaints for the 2002 GMC Sierra 2500 are substantially higher than the model-year median of 46.

About this comparison →

When problems were reported

Mileage at the reported incident

114 reports with mileage · 20 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 44 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes. Review the 32 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 14 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

10 crash reports1 fire reports5 injury reports

What owners actually said

134 reports
90,000 miles · Aug 12, 2009
Engine And Engine Cooling

I HAVE A 2002 GMC SIERRA 2500HD WITH THE 8.1L ENGINE THAT IS EXHIBITING THE EXACT SAME SYMPTOMS THAT LED TO THE RECALL OF THE 2001 MODEL. (NHTSA # 07V521000). ONE MINUTE I'LL BE DRIVING DOWN THE FREEWAY AND THE NEXT MINUTE THE ENGINE WILL STOP RUNNING. THIS HAS HAPPENED NUMEROUS TIMES. SOMETIMES IT'LL RESTART BEFORE IT COMES TO …

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I HAVE A 2002 GMC SIERRA 2500HD WITH THE 8.1L ENGINE THAT IS EXHIBITING THE EXACT SAME SYMPTOMS THAT LED TO THE RECALL OF THE 2001 MODEL. (NHTSA # 07V521000). ONE MINUTE I'LL BE DRIVING DOWN THE FREEWAY AND THE NEXT MINUTE THE ENGINE WILL STOP RUNNING. THIS HAS HAPPENED NUMEROUS TIMES. SOMETIMES IT'LL RESTART BEFORE IT COMES TO A STOP. SOMETIMES IT WILL TAKE SEVERAL MINUTES AFTER IT'S COME TO A STOP. I'VE RESEARCHED IT ON-LINE, AND IT WOULD APPEAR THAT THIS PROBLEM IS NOT RESTRICTED TO THE 2001 MODELS. THE DATE I'VE LISTED IS WHEN I FIRST REMEMBER IT HAPPENING. IT'S VERY INTERMITTENT. IT'S GETTING WORSE. *TR

NHTSA ODI #10280204

74,000 miles · Jul 26, 2009
Engine And Engine Cooling

2002 GMC SIERRA 2500HD 6.0L 4X4. THE 6.0L ENGINE IS KNOCKING CONSTANTLY, AND FROM DOING SOME RESEARCH. THIS IS A VERY COMMON ISSUE AND NEEDS TO BE RESOLVED. DEALER SAID IT IS NORMAL! SINCE WHEN IS AN ENGINE KNOCKING, NORMAL? *TR

NHTSA ODI #10278312

85,000 miles · Apr 1, 2009
Service Brakes, Hydraulic

I HAVE A 2002 GMC SIERRA 2500HD PICKUP TRUCK THAT IS EXHIBITING ABS BRAKING PROBLEMS AT LOW SPEEDS. THE ABS SYSTEM WILL ENGAGE AND DISENGAGE AT LOW SPEEDS ON PERFECTLY DRY DRIVING SURFACES. I WAS INFORMED BY A FRIEND THAT HE THOUGHT GMC HAD A RECALL ON THIS ISSUE. I RESEARCHED ON THE WEB AND FOUND A RECALL THAT DESCRIBED THIS…

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I HAVE A 2002 GMC SIERRA 2500HD PICKUP TRUCK THAT IS EXHIBITING ABS BRAKING PROBLEMS AT LOW SPEEDS. THE ABS SYSTEM WILL ENGAGE AND DISENGAGE AT LOW SPEEDS ON PERFECTLY DRY DRIVING SURFACES. I WAS INFORMED BY A FRIEND THAT HE THOUGHT GMC HAD A RECALL ON THIS ISSUE. I RESEARCHED ON THE WEB AND FOUND A RECALL THAT DESCRIBED THIS SITUATION EXACTLY. I CONTACTED THE LOCAL DEALER AND THEY SAID THERE WAS NO OUTSTANDING RECALLS FOR MY VEHICLE. I THEN CONTACTED GMC DIRECTLY (FROM A PHONE NUMBER LISTED ON ONE OF THE WEB OBTAINED RECALL NOTICES) AND THEY RAN MY VIN AND SAID THAT MY TRUCK WAS NOT COVERED BY THE RECALL. I WANT TO KNOW HOW TO GET MY TRUCK AND SIMILAR TRUCKS INCLUDED IN THE RECALL THAT APPARENTLY DID NOT INCLUDE MY SPECIFIC VEHICLE. *TR

NHTSA ODI #10263826

20,000 miles · Mar 30, 2009
Engine And Engine Cooling

TRUCK WAS STALLING MAYBE THREE TIMES A YEAR APPROX. 3 YEARS AGO. DOESN'T REGISTER ANY CODES. APPROX. 1 MONTH AGO STARTED STALLING DAILY. *TR

NHTSA ODI #10263600

111,000 miles · Jan 30, 2009
Service Brakes, Hydraulic

FRONT ABS ACTIVATES WHILE TRYING TO STOP. THIS IS COVERED BY MANY RECALLS. MY VEHICLE IS NOT INCLUDED ALTHOUGH IT HAS THE EXACT SYMPTOMS. *TR

NHTSA ODI #10256947

134,453 miles · Jan 15, 2009
Trailer Hitches

HEARD NOISE WHEN TOWING TRAILER AND I STOP. A BRIEF INSPECTION OF THE RECEIVER HITCH INSTALLED ON VEHICLE SHOWED BROKEN WELDS AND TEARING METAL DUE TO THE BROKEN WELDS. I CALLED GMC TO REPORT SAFETY ISSUE AND HAVE REPAIRED. THEY DIDN'T HAVE ANY HITCHES IN STOCK AND SAID THEY WOULD NOT PAY FOR THE REPAIR. I TOLD THEM THE SERIOUSN…

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HEARD NOISE WHEN TOWING TRAILER AND I STOP. A BRIEF INSPECTION OF THE RECEIVER HITCH INSTALLED ON VEHICLE SHOWED BROKEN WELDS AND TEARING METAL DUE TO THE BROKEN WELDS. I CALLED GMC TO REPORT SAFETY ISSUE AND HAVE REPAIRED. THEY DIDN'T HAVE ANY HITCHES IN STOCK AND SAID THEY WOULD NOT PAY FOR THE REPAIR. I TOLD THEM THE SERIOUSNESS OF THIS PROBLEM WITH NO RESPONSE. THIS IS A MANUFACTURE DEFECT NOT A WEAR OR ABUSE ISSUE AND COULD POTENTIALLY CAUSE A VERY SERIOUS INCIDENT INCLUDING A FATALITY. I HAVE THE CASE # THAT I WAS GIVEN BY THE CUSTOMER SERVICE REP. I WILL REPLACE THE HITCH THIS WEEK AND SAVE THE OLD PART. *TR

NHTSA ODI #10255184

109,000 miles · Oct 22, 2008
EquipmentFireInjury

TL*THE CONTACT OWNS A 2003 FLEETWOOD ELKHORN. THE VEHICLE HAS A DOMETIC REFRIGERATOR, MODEL RM3663. WHILE ALLOWING THE VEHICLE TO WARM UP, THE CONTACT HEARD THE FURNACE AND ENTERED THE TRAILER TO TURN IT OFF. WHEN HE EXITED THE TRAILER, HE NOTICED FLAMES COMING FROM THE ACCESS DOOR AND SMOKE UNDERNEATH THE REFRIGERATOR. THE …

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TL*THE CONTACT OWNS A 2003 FLEETWOOD ELKHORN. THE VEHICLE HAS A DOMETIC REFRIGERATOR, MODEL RM3663. WHILE ALLOWING THE VEHICLE TO WARM UP, THE CONTACT HEARD THE FURNACE AND ENTERED THE TRAILER TO TURN IT OFF. WHEN HE EXITED THE TRAILER, HE NOTICED FLAMES COMING FROM THE ACCESS DOOR AND SMOKE UNDERNEATH THE REFRIGERATOR. THE ENTIRE TRAILER BECAME ENGULFED IN FLAMES AND WAS DESTROYED ALONG WITH THE VEHICLE. A POLICE REPORT WAS FILED. THE CONTACT SUSTAINED INJURIES TO HIS HANDS AND SMOKE INHALATION. THE MANUFACTURER HAS NOT BEEN NOTIFIED. THE PART NUMBER WAS UNKNOWN. UPDATED 01-26-09 *BF UPDATED 01/26/09.*JB

NHTSA ODI #10246351

50,000 miles · Sep 16, 2008
Tires

FIRESTONE LT245/75-R16. REAR TIRE BLEW OUT AT 70 MPH. ENTIRE TREAD FLEW OFF TIRE. MANAGED TO GET VEHICLE TO THE SHOULDER AND CHANGE THE TIRE. REAR QUARTER OF TRUCK WAS PUSHED IN BY THE TIRE. TIRE MARKS ALL OVER THE REAR QUARTER AND BUMPER. ANOTHER REAR TIRE BLEW IN JUNE OF 2002. NO WARRANTY OFFERED BY DEALER OR FIRESTONE…

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FIRESTONE LT245/75-R16. REAR TIRE BLEW OUT AT 70 MPH. ENTIRE TREAD FLEW OFF TIRE. MANAGED TO GET VEHICLE TO THE SHOULDER AND CHANGE THE TIRE. REAR QUARTER OF TRUCK WAS PUSHED IN BY THE TIRE. TIRE MARKS ALL OVER THE REAR QUARTER AND BUMPER. ANOTHER REAR TIRE BLEW IN JUNE OF 2002. NO WARRANTY OFFERED BY DEALER OR FIRESTONE FOR ORIGINAL TIRES. *TR

NHTSA ODI #10242472

131,520 miles · Jul 21, 2008
Power Train

TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500. THE CONTACT NOTICED FLUID ON THE GROUND AND NOTICED THAT THE UNDERCARRIAGE TRANSFER CASE HAD A HOLE. HE SEALED THE HOLE. THE DEALER STATED THAT THE UNDERCARRIAGE TRANSFER GAUGE NEEDED TO BE REPLACED AT THE COST OF $2,000. THE MANUFACTURER IS AWARE OF THE FAILURE. THERE IS NO RECAL…

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TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500. THE CONTACT NOTICED FLUID ON THE GROUND AND NOTICED THAT THE UNDERCARRIAGE TRANSFER CASE HAD A HOLE. HE SEALED THE HOLE. THE DEALER STATED THAT THE UNDERCARRIAGE TRANSFER GAUGE NEEDED TO BE REPLACED AT THE COST OF $2,000. THE MANUFACTURER IS AWARE OF THE FAILURE. THERE IS NO RECALL OR TECHNICAL SERVICE BULLETIN. THE FAILURE MILEAGE WAS 131.550 AND CURRENT MILEAGE IS 131,523. UPDATED 09/16/08 *BF UPDATED 09/19/08. *JB

NHTSA ODI #10235185

52,000 miles · Jul 2, 2008
Engine And Engine Cooling

I HAVE A 2002 GMC SIERRA 2500HD PICKUP WITH THE VORTEC 8.1 ENGINE. I AM EXPERIENCING THE SAME CRANK POSITION SENSOR FAILURE AS EXPERIENCED IN THE 2001 MODEL YEAR RECALL (SAFETY RECALL # 06083). I AM NOT ALONE, AS MANY MANY OTHERS ARE HAVING THE SAME ISSUES IN THEIR 2002-2004 PICKUP TRUCKS. I BELIEVE THE NHTSA SHOULD EXTEND SAFET…

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I HAVE A 2002 GMC SIERRA 2500HD PICKUP WITH THE VORTEC 8.1 ENGINE. I AM EXPERIENCING THE SAME CRANK POSITION SENSOR FAILURE AS EXPERIENCED IN THE 2001 MODEL YEAR RECALL (SAFETY RECALL # 06083). I AM NOT ALONE, AS MANY MANY OTHERS ARE HAVING THE SAME ISSUES IN THEIR 2002-2004 PICKUP TRUCKS. I BELIEVE THE NHTSA SHOULD EXTEND SAFETY RECALL # 06083 TO INCLUDE MODEL YEARS 2002 TO 2004, AS SOME MODELS MANUFACTURED IN CANADA FREQUENTLY USE PARTS FROM PREVIOUS US MODEL YEARS. MY VEHICLE IS NOT SAFE TO OPERATE ON THE HIGHWAYS AS A RESULT. PLEASE ADVISE. *TR

NHTSA ODI #10232980

Official recalls

1

01V220000 · Interior Lighting

Jun 26, 2001

VEHICLE DESCRIPTION: CERTAIN PICKUP TRUCKS EQUIPPED WITH 6.6L DIESEL ENGINES FAIL TO COMPLY WITH REQUIREMENTS OF FMVSS NO. 105, "HYDRAULIC AND ELECTRIC BRAKE SYSTEMS." THESE VEHICLES HAVE A BRAKE SYSTEM WARNING LIGHT IN THE INSTRUMENT CLUSTER THAT MAY NOT ILLUMINATE WHEN THE BRAKE FLUID IS LOW. IN ADDITION, WHEN THE BRAKE FLUID IS LOW, THE VEHICLE MAY NOT MEET THE PARTIAL SYSTEM REQUIREMENTS OF FMVSS NO. 105.

Consequence & remedy

Consequence: THESE CONDITIONS COULD RESULT IN REDUCED BRAKING CAPABILITY, WHICH COULD LEAD TO A CRASH.

Remedy: DEALERS WILL CHANGE THE LOCATION OF A WIRE CONNECTION IN THE UNDERHOOD BUSSED ELECTRICAL CENTER. OWNER NOTIFICATION BEGAN JULY 9, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT CHEVROLET AT 1-800-222-1020 OR GMC AT 1-800-462-8782.

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

3

EA07013 · Trailer Hitch Receiver Failure

Opened Sep 14, 2007 · Closed Sep 12, 2008

Status: closed (inferred from source dates) · Trailer Hitches

COMPLAINT REPORTS ALLEGE POOR WELD QUALITY AND/OR BENDING OF THE SUBJECT VEHICLE ORIGINAL EQUIPMENT TRAILER HITCH RECEIVER.THE AGENCY'S INVESTIGATION INCLUDED ANALYSIS OF MANUFACTURER AND AGENCY INCIDENT REPORTS, REVIEW OF POLICE REPORTS, ANALYSIS OF THE AGENCY'S FATAL ANALYSIS REPORTING SYSTEM, A VEHICLE OWNER SURVEY, INSPECTION OF TOW VEHICLES/HITCHES AND ANALYSIS OF FAILED PARTS.INCIDENTS OF WELD FAILURE WERE RARE AND ASSOCIATED WITH VERY LOW-SPEED DRIVING (TURNING, BACKING AND SUDDEN STOPPING).INCIDENTS OF BENDING WERE ASSOCIATED WITH IMPROPER TRAILER HITCH ADJUSTMENT OR OVERLOADING. A SAFETY-RELATED DEFECT HAS NOT BEEN IDENTIFIED AT THIS TIME AND FURTHER USE OF AGENCY RESOURCES DOES NOT APPEAR TO BE WARRANTED.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL MONITOR THIS ISSUE AND RESERVES THE RIGHT TO TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES.SEE DOCUMENT SEARCH FILE FOR ADDITION INFORMATION.

PE07025 · Trailer Hitch Receiver Failure

Opened May 14, 2007 · Closed Sep 14, 2007

Status: closed (inferred from source dates) · Trailer Hitches

GM PROVIDED ADDITIONAL DATA REGARDING ALLEGATIONS OF FAILURE OF THE TRAILER HITCH.ODI REVIEWED THAT AS WELL AS OTHER DATA PROVIDED BY PEER MANUFACTURERS.BASED ON OUR REVIEW, ODI FINDS THE NEED TO FURTHER INVESTIGATE THIS ISSUE.THIS PRELIMINARY EVALUATION IS UPGRADED TO AN ENGINEERING ANALYSIS (EA07-013) FOR FURTHER ASSESSMENT AND STUDY OF THIS ISSUE.

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.