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2000 GMC Sierra 3500

Owner reports · Recalls · Investigations

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Mileage at the reported incident

Limited mileage data: 15 of 26 reports include usable mileage. There isn’t enough coverage to show a useful chart.

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 12 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 3 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Power Train. Review the 3 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 reports3 injury reports

Service Brakes, Hydraulic complaints

12 reports
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Mileage unknown · Sep 26, 2011
Service Brakes, Hydraulic

EXITING THE HIGHWAY ON AN OFF RAMP, APPLIED THE BRAKES AND THE PEDDLE WENT TO THE FLOOR. FOUND A BRAKE LINE HAD CORRODED AND BURST. HAD TO REPAIR ALONG THE ROAD. *TR

NHTSA ODI #10427501

29,567 miles · Dec 28, 2010
Service Brakes, HydraulicCrash

2000 GMC K3500 REG. CAB PICKUP 4X4 -- BRAKE PEDAL GOES TO FLOOR AND ABS SYSTEM ENGAGES. VEHICLE HAS EXTENDED BRAKING DISTANCES ON DRY PAVEMENT. BRAKE LIGHT COMES ON AND GOES OFF AFTER RE-APPLICATION OF BRAKES BY "PUMPING" THEM. PEDAL ALSO GOES TO FLOOR WITHOUT ENGAGEMENT OF ABS SYSTEM AND VEHICLE WILL NOT STOP. PROBLEM HAS BEEN …

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2000 GMC K3500 REG. CAB PICKUP 4X4 -- BRAKE PEDAL GOES TO FLOOR AND ABS SYSTEM ENGAGES. VEHICLE HAS EXTENDED BRAKING DISTANCES ON DRY PAVEMENT. BRAKE LIGHT COMES ON AND GOES OFF AFTER RE-APPLICATION OF BRAKES BY "PUMPING" THEM. PEDAL ALSO GOES TO FLOOR WITHOUT ENGAGEMENT OF ABS SYSTEM AND VEHICLE WILL NOT STOP. PROBLEM HAS BEEN RECURRING FOR THREE (3) YEARS BUT THIS TIME VEHICLE WAS INTENTIONALLY DRIVEN INTO A SNOWBANK TO PREVENT A COLLISION WITH ANOTHER VEHICLE. ON 06/24/2010 DRIVER REAR BRAKE LINE (STEEL) ROTTED THROUGH WHERE IT TOUCHED FRAME AND EXPELLED ALL BRAKE FLUID FROM MASTER CYLINDER ALSO CAUSING BRAKE FAILURE.OTHER LINES ALSO SHOWING PREMATURE CORROSION. BRAKES ALWAYS HAVE A SOFT AND SPONGY FEEL EVEN AFTER REPLACEMENT OF FLUID AND BLEEDING OF ENTIRE SYSTEM. PARKING BRAKE CABLE (FRONT) ALSO SNAPPED DUE TO CORROSION AT UNDERSIDE OF CAB. *TR

NHTSA ODI #10372633

48,000 miles · Sep 7, 2010
Service Brakes, Hydraulic

BRAKE LINES HAVE RUSTED AND RUPTURED IN MY 2000 GMC 3500 3 TIMES. I AM THE ORIGINAL OWNER. LAST REPLACEMENT LASTED ONLY 23 MONTHS. *TR

NHTSA ODI #10354109

88,000 miles · Jun 24, 2010
Service Brakes, Hydraulic

STEEL BRAKE PIPE THAT CARRIES FLUID TO THE REAR BRAKES RUPTURED NEXT TO THE FUEL TANK. FLUID IS LEAKING AND POOLING ON THE FLANGE OF FRAME. STOPPING PERFORMANCE IS DEGRADED, AND NO WARNING HAS REGISTERED VIA THE INSTRUMENT CLUSTER OR IDIOT LIGHTS. LINE IS BADLY CORRODED, WHICH PERHAPS IS TO BE EXPECTED GIVEN THE AGE OF THE VE…

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STEEL BRAKE PIPE THAT CARRIES FLUID TO THE REAR BRAKES RUPTURED NEXT TO THE FUEL TANK. FLUID IS LEAKING AND POOLING ON THE FLANGE OF FRAME. STOPPING PERFORMANCE IS DEGRADED, AND NO WARNING HAS REGISTERED VIA THE INSTRUMENT CLUSTER OR IDIOT LIGHTS. LINE IS BADLY CORRODED, WHICH PERHAPS IS TO BE EXPECTED GIVEN THE AGE OF THE VEHICLE. HOWEVER, I FIND IT IRONIC THAT THE EXHAUST SYSTEM IS MADE OF STAINLESS STEEL YET THE BRAKE LINES ARE NOT. THIS VEHICLE HAS HAD OTHER BRAKE-RELATED FAILURES THAT GM REFUSED TO CORRECT, DESPITE HAVING RECALLED CONTEMPORARY VEHICLES WITH IDENTICAL PROBLEMS. IT IS AN UNUSUAL BUILD - OLD (GMT400)BODYSTYLE, MODEL YEAR 2000, 1 TON CREW CAB LONGBOX. I BELIEVE GM FORGOT THEY BUILT THESE AND THUS THEY NEGLECT TO INCLUDE TRUCKS OF THIS TYPE IN THEIR PRIOR RECALLS. REGISTERING THIS COMPLAINT IN HOPES THAT GM WILL REMEMBER TO INCLUDE SUCH TRUCKS IN THE ONGOING PE OVER THE BRAKE PIPE CORROSION ISSUE. *TR

NHTSA ODI #10339869

57,007 miles · May 28, 2010
Service Brakes, Hydraulic

BRAKE LINES HAVE CORRODED TO THE POINT THE VEHICLE FAILS LOCAL SAFETY INSPECTION CAUSE WAS SAID TO BE BAD MATERIAL USED IN BRAKE LINE CONSTRUCTION. *TR

NHTSA ODI #10332628

74,000 miles · Nov 6, 2008
Service Brakes, Hydraulic

ABS BRAKES ACTIVATE INAPPROPRIATELY AT LOW SPEEDS (UNDER 10 MPH) ON SMOOTH DRY SURFACES. THIS LENGTHENS THE STOPPING DISTANCE AND CREATES THE POTENTIAL FOR A CRASH WHEN AVAILABLE STOPPING DISTANCE IS LIMITED. THE DESIGN IS FLAWED IN THAT 1) NORMAL CORROSION, EXPECTED DURING THE LIFE OF THE VEHICLE, FREQUENTLY LEADS TO THIS FAI…

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ABS BRAKES ACTIVATE INAPPROPRIATELY AT LOW SPEEDS (UNDER 10 MPH) ON SMOOTH DRY SURFACES. THIS LENGTHENS THE STOPPING DISTANCE AND CREATES THE POTENTIAL FOR A CRASH WHEN AVAILABLE STOPPING DISTANCE IS LIMITED. THE DESIGN IS FLAWED IN THAT 1) NORMAL CORROSION, EXPECTED DURING THE LIFE OF THE VEHICLE, FREQUENTLY LEADS TO THIS FAILURE OF THE BRAKE SYSTEM, AND 2) WHEN THIS NORMAL, EXPECTED CORROSION OCCURS, THE ABS SYSTEM DOES NOT 'FAIL TO SAFE', BUT INSTEAD FAILS IN A MANNER THAT REDUCES BRAKE SYSTEM PERFORMANCE AND INCREASES STOPPING DISTANCE ONCE PROBLEM BEGAN, IT HAPPENS ALL THE TIME. DEALER REMOVED THE FRONT WHEEL SPEED SENSORS FROM THE WHEEL BEARINGS, CLEANED CORROSION OFF THE MOUNTING SURFACE, AND REINSTALLED THE SENSORS. THIS IS EXACTLY THE SAME FAILURE MODE, SAME ROOT CAUSE, SAME CORRECTIVE ACTION AS DESCRIBED IN GM'S EXISTING PRODUCT SAFETY RECALL #05068C, HOWEVER GM REFUSED TO REPAIR THE VEHICLE UNDER THE TERMS OF THE RECALL BECAUSE, AS IT IS CURRENTLY WRITTEN, THE RECALL DOES NOT COVER THE SMALL NUMBER OF TRUCKS BUILT AT THE FLINT PLANT. MY VEHICLE WAS BUILT IN THE AFFECTED TIME FRAME, WITH THE SUSPECT COMPONENTS, AND EXHIBITS EXACTLY THE SAME SAFETY DEFECT AS DESCRIBED IN THE RECALL, BUT GM HAS THEIR HEAD IN THE SAND WITH REGARD TO THE FACT THAT THERE WERE A BATCH OF AFFECTED VEHICLES BUILT AT FLINT. THE RECALL NEEDS TO BE EXPANDED AND GM SHOULD BE ASSESSED PUNITIVE DAMAGES FOR THE SHAMEFUL WAY THEY ARE TREATING CUSTOMERS WHO REQUEST ASSISTANCE IN GETTING THEIR VEHICLE FIXED. I HAD THE VEHICLE REPAIRED AT MY OWN EXPENSE AND GM HAS REFUSED TO ASSIST WITH THE COST OF THE REPAIR. GM REP ACTUALLY SUGGESTED THAT I FILE THIS COMPLAINT, AS HE CLAIMED THAT HE WAS NOT EMPOWERED TO RESOLVE THE PROBLEM WITHOUT A NHTSA COMPLAINT HISTORY TO JUSTIFY ACTION. *TR

NHTSA ODI #10247896

127,000 miles · Mar 7, 2007
Service Brakes, Hydraulic

TRIED TO STOP ON DRY PAVEMENT, BUT DUE TO ABS MALFUNCTION, THE TRUCK WASN'T ABLE TO STOP. WE HAVE HAD MANY INCIDENTS WHERE THERE COULD HAVE BEEN PROPERTY DAMAGE AND POSSIBLE DEATH DUE TO BRAKING SYSTEM. THE ABS WOULD CALCULATE WHEEL LOCK UP EVEN WHEN THE TRUCK DID NOT HAVE "LOCK UP" AND ENGAGE SYSTEM NOT ALLOWING TRUCK TO STOP. …

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TRIED TO STOP ON DRY PAVEMENT, BUT DUE TO ABS MALFUNCTION, THE TRUCK WASN'T ABLE TO STOP. WE HAVE HAD MANY INCIDENTS WHERE THERE COULD HAVE BEEN PROPERTY DAMAGE AND POSSIBLE DEATH DUE TO BRAKING SYSTEM. THE ABS WOULD CALCULATE WHEEL LOCK UP EVEN WHEN THE TRUCK DID NOT HAVE "LOCK UP" AND ENGAGE SYSTEM NOT ALLOWING TRUCK TO STOP. MAILMAN PULLED OUT IN FRONT OF TRUCK COULDN'T SLOW DOWN, BUT DID AVOID ACCIDENT. RAN A STOP SIGN ONCE. ALMOST RAN INTO THE SIDE OF A BUILDING. THERE ARE A NUMBER OF INCIDENT'S, I KNOW OF THREE OR MORE VEHICLES WITH SAME PROBLEMS, ALL ARE MADE BY GM. WHEEL BEARINGS AND SPEED SENSORS MUST BE REPLACED AND POSSIBLY AXLES BECAUSE THERE IS A RING GEAR THAT EMITS SIGNAL TO WHEEL SPEED SENSOR, RING GEAR IS ON AXLE OR WHEEL BEARING. WHEEL BEARING COST 265.00 A SIDE ON MY FAMILY'S 2000 GMC SIERRA 3500 4X4 CREW CAB LONG BOX DUALLY. AN EASY ZERO COST TO FIX THIS IS TO PULL OUT THE 30 AMP TO 60 AMP FUSE IN POWER DISTRIBUTION CENTER UNDER THE HOOD. THIS DISABLES THE ABS AND DOES NOT ALLOW IT TO OPERATE. ABS LIGHT ON DASH COMES ON TO NOTIFY THIS. THIS MAY SHOCK YOU, BUT I DON'T LIKE ABS ANYWAY AND IF YOUR A SAFE DRIVER YOU DON'T NEED ABS IN THE FIRST PLACE BECAUSE IF SOMETHING HAPPENS IN FRONT OF YOU THAT ISN'T CONTROLLABLE, YOUR GOING TO HIT THEM OR IF YOUR SMART, YOU WILL GO FOR THE DITCH. ANYWAYS WITH THE FUSE PULLED YOU WILL HAVE THE SAME BRAKES THAT YOU HAD BEFORE, ONLY THAT THE ABS WILL NOT BE ABLE TO HELP YOU STOP IN A CASE WHERE THERE IS WHEEL LOCK UP, NOT THAT IT WAS HELPING ANYWAY (THIS IS WHY I AM WRITING TO YOU). AND YOU SHOULD NOT HAVE A PROBLEM WITH RUNNING INTO THINGS OR RUNNING STOP SIGNS. AND I HAVEN'T HAD A PROBLEMS SINCE. *JB

NHTSA ODI #10184394

Mileage unknown · Jun 25, 2004
Service Brakes, Hydraulic

WHILE APPLYING THE BRAKES A LOUD NOISE WAS HEARD FROM THE FRONT. CONSUMER DROVE THE VEHICLE TO THE DEALER FOR INSPECTION, AND MECHANIC DETERMINED THAT THE BRAKE PADS NEEDED TO BE REPLACED. MECHANIC WAS WAITING FOR CONFORMATION APPROVAL TO REPLACE THE BRAKES PADS. CONSUMER CONTACTED THE DEALER MORE THAN ONCE, AND THE PROBLEM …

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WHILE APPLYING THE BRAKES A LOUD NOISE WAS HEARD FROM THE FRONT. CONSUMER DROVE THE VEHICLE TO THE DEALER FOR INSPECTION, AND MECHANIC DETERMINED THAT THE BRAKE PADS NEEDED TO BE REPLACED. MECHANIC WAS WAITING FOR CONFORMATION APPROVAL TO REPLACE THE BRAKES PADS. CONSUMER CONTACTED THE DEALER MORE THAN ONCE, AND THE PROBLEM RECURRED. *AK

NHTSA ODI #10079962

Mileage unknown · Feb 13, 2003
Power TrainSeatsService Brakes, Hydraulic

THE FRONT END OF THE VEHICLE VIBRATED. THE TRANSMISSION, BRAKES, BUCKET SEATS, AND DIFFERENTIAL UNIT MALFUNCTIONED. *AK *JB

NHTSA ODI #568072

Mileage unknown · Nov 25, 2002
Service Brakes, Hydraulic

CONSUMER STATE WHILE TRAVELING WITHOUT ANY INDICATION VEHICLE LOST ALL POWER STEERING AND NO BRAKES TRAVELING AT 35 MPH. PLEASE PROVIDER FURTHER INFORMATION. TS

NHTSA ODI #8023230

Official recalls

2

04V562000 · Equipment Adaptive/mobility

Nov 26, 2004

ON CERTAIN VANS EQUIPPED WITH SURE-LOK WHEELCHAIR SECUREMENT SYSTEMS, THE SPROCKET TEETH OF THE RETRACTOR ASSEMBLY IS OUT OF ALIGNMENT.

Consequence & remedy

Consequence: IN THE EVENT OF A VEHICLE CRASH, THE WHEELCHAIR MAY NOT BE ADEQUATELY SECURED POSSIBLY RESULTING IN INJURIES TO A WHEELCHAIR OCCUPANT.

Remedy: DEALERS WILL INSPECT AND REPLACE THE WHEELCHAIR SECUREMENT RETRACTORS AS NECESSARY. SURE-LOK WILL HANDLE THE REPAIRS FOR THIS CAMPAIGN. OWNERS SHOULD CONTACT SURE-LOCK AT 1-908-231-1804 OR MOBILITYWORKS AT 1-800-769-8267.

00V054000 · Steering:linkages:drag:link:connection

Feb 28, 2000

VEHICLE DESCRIPTION: CHASSIS CABS. THE TAPERED HOLE IN THE DRAG LINK END THAT ATTACHES TO THE PITMAN ARM TAPERED BALL STUD MAY BE MACHINED TOO DEEP CAUSING THE HOLE TO BE OVERSIZED. A DRAG LINK WITH AN OVERSIZED HOLE MAY NOT "SEAT" THE PITMAN ARM TAPERED BALL WHEN ASSEMBLED. THIS COULD CAUSE HIGHER THAN NORMAL FRICTION BETWEEN COMPONENTS DURING OPERATION, AND POSSIBLY RESULT IN JOINT SEPARATION OR A BROKEN BALL STUD.

Consequence & remedy

Consequence: IF THE JOINT SEPARATED OR THE BALL STUD BRAKE WHILE THE VEHICLE WAS MOVING, STEERING CONTROL WOULD BE LOST.

Remedy: DEALERS WILL INSPECT THE STEERING LINKAGE ASSEMBLY AND, IF NECESSARY, REPLACE THE DRAG LINK AND THE PITMAN ARM.

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.