← New search

2000 GMC Sierra 2500

Owner reports · Recalls · Investigations

Similar to other model years

Owner complaints for the 2000 GMC Sierra 2500 do not stand out strongly from the model-year median of 46.

About this comparison →

How this year compares

Owner complaints by model year

Other model years Selected year
Compare all Sierra 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

39 reports with mileage · 9 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 23 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes. Review the 8 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

3 crash reports1 fire reports1 injury reports

What owners actually said

48 reports
178,000 miles · Jul 9, 2026
Equipment

The contact owns a 2000 GMC Sierra 2500. The contact stated that the spare tire detached from the vehicle after the cable securing the spare tire fractured. The contact discovered the failure upon returning to the residence from an errand and found the spare tire in the driveway. No warning lights illuminated, and no unusual sou…

Read full complaint

The contact owns a 2000 GMC Sierra 2500. The contact stated that the spare tire detached from the vehicle after the cable securing the spare tire fractured. The contact discovered the failure upon returning to the residence from an errand and found the spare tire in the driveway. No warning lights illuminated, and no unusual sounds occurred prior to the failure. The contact expressed concern that the detached spare tire could become a road hazard and increase the risk of a crash. The vehicle was not taken to a dealer. The manufacturer was not notified of the failure. The failure mileage was approximately 178,000.

NHTSA ODI #11749361

75,000 miles · Mar 4, 2018
Electrical SystemService Brakes

WHILE DRIVING THE BRAKE AND ABS LIGHTS ON THE INSTRUMENT PANEL LIGHT UP. THIS HAS OCCURRED WHILE DRIVING OF THE FREEWAY AND ON CITY STREETS. SOMETIMES THESE LIGHTS GO OFF AND SOMETIMES THEY REMAIN LIGHTED. WHEN THIS HAPPENS I FEAR THAT THERE IS A PROBLEM WITH THE BRAKES AND HAVE TAKEN THIS MATTER TO A MECHANIC. THE BRAKES WE…

Read full complaint

WHILE DRIVING THE BRAKE AND ABS LIGHTS ON THE INSTRUMENT PANEL LIGHT UP. THIS HAS OCCURRED WHILE DRIVING OF THE FREEWAY AND ON CITY STREETS. SOMETIMES THESE LIGHTS GO OFF AND SOMETIMES THEY REMAIN LIGHTED. WHEN THIS HAPPENS I FEAR THAT THERE IS A PROBLEM WITH THE BRAKES AND HAVE TAKEN THIS MATTER TO A MECHANIC. THE BRAKES WERE EXAMINED AND HE FOUND NOTHING WRONG. THIS IS VERY STARTLING TO THE DRIVER AND OF GREAT CONCERN. THIS APPEARS ON INTERNET SEARCHES AND IT APPEARS THAT 100,000 PLUS INDIVIDUALS HAVE THIS PROBLEM. I HAVE CONTACTED THE DEALER AND OBVIOUSLY THIS MATTER HAS BEEN BROUGHT TO THERE ATTENTION. YET THEY CLAIM THEY ARE UNFAMILIAR AND WANT TO CHARGE $600 TO DIAGNOSE AND THEN LIKELY MORE TO FIX. THIS IS OBVIOUSLY A LIE AS THERE IS NO WAY THAT ONE COULD BE READING SO MUCH ABOUT THIS ON THE INTERNET IF IT WAS NOT A PROBLEM IN THE GMC SIERRA TRUCKS. SOME CLAIM IT IS A FAULTY CIRCUIT BOARD WHILE OTHERS HAVE LOST THE USE OF THEIR BRAKES. THIS IS OF GREAT CONCERN. THIS OCCURS WHILE DRIVING AND THE VEHICLE IS IN MOTION AND SOMETIMES AT HIGH SPEEDS ON A FREEWAY.

NHTSA ODI #11076167

168,000 miles · Dec 4, 2017
Service BrakesSuspension

I PURCHASED THIS TRUCK USED AND WAS ABLE TO USE FOR A BOUT A MONTH BEFORE BOTH REAR SPRING PERCHES BROKE ALLOWING THE SPRINGS TO REST UNDER THE PICKUP BODY, AFTER REPLACING THEM THE BRAKE LINES RUPTURED BECAUSE OF RUST ANOTHER POOR QUALITY PRODUCT FROM GM !

NHTSA ODI #11052382

190,000 miles · Aug 18, 2017
Service Brakes

BRAKE LINES RUSTED TO POINT OF REPLACEMENT

NHTSA ODI #11016132

Mileage unknown · Apr 6, 2017
StructureCrash

GMC TRUCK FRAMES CRACKING, ROTTING OUT, BRAKING DUE TO POOR DESIGN AND COATING AND GM WON'T STEP UP AND TAKE RESPONSIBILITY AS TOYOTA HAS. THE CONSUMER GETS AN UNSAFE VEHICLE BECAUSE OF FRAMES GIVING OUT WELL BEFORE THE BODY, THE FRAMES SHOULD BE STRONG. IN UNDER 2 YEARS THE FRAME WENT FROM STRONG AND SAFE TO NOW RUSTED UP SCRAP…

Read full complaint

GMC TRUCK FRAMES CRACKING, ROTTING OUT, BRAKING DUE TO POOR DESIGN AND COATING AND GM WON'T STEP UP AND TAKE RESPONSIBILITY AS TOYOTA HAS. THE CONSUMER GETS AN UNSAFE VEHICLE BECAUSE OF FRAMES GIVING OUT WELL BEFORE THE BODY, THE FRAMES SHOULD BE STRONG. IN UNDER 2 YEARS THE FRAME WENT FROM STRONG AND SAFE TO NOW RUSTED UP SCRAP METAL. AMERICAN QUALITY SHOULD BE OF GREAT STANDARDS IN MY UP MOST OPINION BEING AN ARMY VETERAN. GENERAL MOTORS SHOULD COMPANSATE OWNERS OR BUY THEM BACK AS TOYOTA HAS.

NHTSA ODI #10970893

92,000 miles · Jun 30, 2016
Service BrakesStructureSuspension

TL* THE CONTACT OWNS A 2000 GMC SIERRA 2500. WHILE DRIVING APPROXIMATELY 35 MPH, THE REAR OF THE VEHICLE SLIGHTLY LOWERED TOWARDS THE GROUND. THE VEHICLE WAS DRIVEN WITH CAUTION TO THE CONTACT'S RESIDENCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THAT THE DRIVER SIDE MAIN FRAME RAIL WAS FRACTURED IN THE CENTER. ADDITIO…

Read full complaint

TL* THE CONTACT OWNS A 2000 GMC SIERRA 2500. WHILE DRIVING APPROXIMATELY 35 MPH, THE REAR OF THE VEHICLE SLIGHTLY LOWERED TOWARDS THE GROUND. THE VEHICLE WAS DRIVEN WITH CAUTION TO THE CONTACT'S RESIDENCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THAT THE DRIVER SIDE MAIN FRAME RAIL WAS FRACTURED IN THE CENTER. ADDITIONALLY, THE PASSENGER SIDE MAIN RAIL WAS PARTIALLY FRACTURED. THE FAILURE WAS BEYOND REPAIR. THE CONTACT MENTIONED THAT THE BRAKE LINE AND REAR CROSS MEMBER NEAR THE FUEL TANK WERE COMPLETELY CORRODED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 92,000.

NHTSA ODI #10881739

68,700 miles · Jan 24, 2015
Service Brakes

I WAS TURNING AROUND IN MY DRIVEWAY, WHEN SUDDENLY THE BRAKE PEDDLE WENT TO THE FLOOR AND ALL BRAKING POWER WAS LOST. TRIED PUMPING THE BRAKES MULTIPLE TIMES WITH NO SUCCESS. THERE WAS NO WARNING (LIGHTS OR OTHERWISE) BEFORE THE INCIDENT, AND NO DASH LIGHTS LIT DURING THE INCIDENT EITHER. *TR

NHTSA ODI #10678693

65,000 miles · Jun 9, 2014
SteeringStructureSuspension

FRONT CROSSMEMBER WELDS SEVERELY RUSTED AND ROTTED OUT. CROSSMEMBER ABOUT READY TO BREAK LOOSE FROM FRAME. FRONT FRAME RAILS SEVERELY RUSTED AND ROTTED OUT. FRONT SUSPENSION PARTS SEVERELY RUSTED AND ROTTING AWAY. REAR FRAME SEVERELY RUSTED AND ROTTED OUT. SHOCK MOUNTS ABOUT READY TO BREAK LOOSE FROM FRAME. ABSOLUTELY UNACC…

Read full complaint

FRONT CROSSMEMBER WELDS SEVERELY RUSTED AND ROTTED OUT. CROSSMEMBER ABOUT READY TO BREAK LOOSE FROM FRAME. FRONT FRAME RAILS SEVERELY RUSTED AND ROTTED OUT. FRONT SUSPENSION PARTS SEVERELY RUSTED AND ROTTING AWAY. REAR FRAME SEVERELY RUSTED AND ROTTED OUT. SHOCK MOUNTS ABOUT READY TO BREAK LOOSE FROM FRAME. ABSOLUTELY UNACCEPTABLE AND PATHETIC FOR A 13 YEAR OLD, 32,000 DOLLAR TRUCK TO BE UN-DRIVABLE AND IN THIS CONDITION. *TR

NHTSA ODI #10597059

106,000 miles · Apr 8, 2014
Engine And Engine CoolingFire

I BEEN HAVING A PROBLEM WITH THE EXHAUST MANIFOLD BOLTS BREAKING OFF. I SPENT A TON OF MONEY REPLACING O2 SENSORS OVER THE LAST 4 YEARS. I'VE JUST CURRENTLY FOUND OUT THAT THE O2 SENSORS WERE NOT BAD, IT WAS ACTUALLY THE EXHAUST HEADER BOLTS BREAKING ALLOWING MY EMISSION SYSTEM TO MALFUNCTION. I'VE HAD 3 BOLTS REPLACED 2 MONTHS …

Read full complaint

I BEEN HAVING A PROBLEM WITH THE EXHAUST MANIFOLD BOLTS BREAKING OFF. I SPENT A TON OF MONEY REPLACING O2 SENSORS OVER THE LAST 4 YEARS. I'VE JUST CURRENTLY FOUND OUT THAT THE O2 SENSORS WERE NOT BAD, IT WAS ACTUALLY THE EXHAUST HEADER BOLTS BREAKING ALLOWING MY EMISSION SYSTEM TO MALFUNCTION. I'VE HAD 3 BOLTS REPLACED 2 MONTHS AGO AT A TIDY COST OF $1000.00. ONE WEEK AGO I WAS DRIVING DOWN THE ROAD AND SMELLED EXHAUST FUMES IN MY TRUCK CAB. I TOOK MY TRUCK TO MY MECHANIC AND HE FOUND 3 MORE BOLTS ON THE RIGHT SIDE OF THE ENGINE BROKEN OFF. NOT ONLY AM I WITHOUT A VEHICLE (BECAUSE AT THIS TIME I CANNOT AFFORD THE REPAIR) I THINK GENERAL MOTORS SHOULD CORRECT MY PROBLEM AND PAY FOR PREVIOUS REPAIRS. THIS IS POOR WORKMAN SHIP ON THEIR PART NOT TO MENTION A SERIOUS SAFETY HAZARD. ALL GM TRUCKS MANUFACTURED BETWEEN 1999 AND 2007 WITH V-8 ENGINES HAVE THIS PROBLEM. GM SHOULD MAN UP TO THIS ISSUE AND RECALL AND REPAIR THE FAULTY EXHAUST MANIFOLD BOLT PROBLEM. I FOR ONE THINK THIS COULD BE A SAFETY ISSUE AND ENVIRONMENTAL CONCERN. MY TRUCK CANNOT PASS AN ENVIRONMENTAL EMISSIONS TEST AT THIS TIME. *TR

NHTSA ODI #10578313

138,675 miles · Feb 27, 2014
Service Brakes, Hydraulic

I WAS RETURNING HOME FROM LEXINGTON KY WHEN I CAME AROUND A CURVE THERE WERE TWO DEER IN THE ROAD. I HIT THE BRAKES HARD AND THE PEDAL WENT TO THE FLOOR. I HIT ONE OF THE DEER WITH A GLANCING BLOW. THERE WAS NO DAMAGE TO MY TRUCK AND THE DEER RAN AWAY. THANK GOD I WAS NOT IN LEXINGTON WHEN THIS HAPPENED AND THE DEER WAS NOT A CH…

Read full complaint

I WAS RETURNING HOME FROM LEXINGTON KY WHEN I CAME AROUND A CURVE THERE WERE TWO DEER IN THE ROAD. I HIT THE BRAKES HARD AND THE PEDAL WENT TO THE FLOOR. I HIT ONE OF THE DEER WITH A GLANCING BLOW. THERE WAS NO DAMAGE TO MY TRUCK AND THE DEER RAN AWAY. THANK GOD I WAS NOT IN LEXINGTON WHEN THIS HAPPENED AND THE DEER WAS NOT A CHILD. I AM 72 YEARS OLD AND I DON'T HAVE THE MONEY OR THE ENERGY TO MAKE THIS REPAIR. LAST YEAR MY SON WAS BACKING HIS 2001 SILVERADO TO THE LAKE TO LOAD A BOAT WHEN THIS SAME THING HAPPENED. THE TRUCK WENT INTO THE WATER UP TO THE CAB BEFORE HE GOT IT INTO ANOTHER GEAR. AFTER A 1100.00 REPAIR HE TRADED FOR A FORD. GENERAL MOTORS NEEDS TO BE HELD ACCOUNTABLE FOR THIS DEFECT

NHTSA ODI #10567236

Official recalls

1

00V222000 · Service Brakes, Hydraulic:power Assist:vacuum

Aug 8, 2000

VEHICLE DESCRIPTION: LIGHT DUTY PICKUP TRUCKS AND SPORT UTILITY VEHICLES EQUIPPED WITH VACUUM POWER, 4-WHEEL DISC BRAKES. THESE VEHICLES FAIL TO COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 105, "HYDRAULIC BRAKE SYSTEMS." THESE VEHICLES WERE BUILT WITH A KINKED BRAKE BOOSTER VACUUM SUPPLY HOSE.

Consequence & remedy

Consequence: THESE VEHICLES DO NOT COMPLY WITH REQUIREMENTS OF FMVSS NO. 105.

Remedy: DEALERS WILL RE-ROUTE THE BRAKE BOOSTER VACUUM SUPPLY HOSE.

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

1

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.