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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

Service Brakes complaints

32 reports
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136,000 miles · Dec 4, 2017
Fuel/propulsion SystemPower TrainService Brakes

I PURCHASE THIS TRUCK 2/03/17 AND HAVE USED IT UNTIL 2 WEEKS AGE WHEN THE BRAKE LINES BROKE IN MY DRIVEWAY, I AM HAVING THE LINES REPLACED WITH STAINLESS LINES AT A COST OF ABOUT $1200 ( I AM NOT SURE OF THE TOTAL COST BECAUSE IT ALSO NEEDS A ANTILOCK BRAKING PUMP WHICH WAS BADLY CORRODED) THE FUEL LINGS ARE ALSO RUSTED AND NEED…

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I PURCHASE THIS TRUCK 2/03/17 AND HAVE USED IT UNTIL 2 WEEKS AGE WHEN THE BRAKE LINES BROKE IN MY DRIVEWAY, I AM HAVING THE LINES REPLACED WITH STAINLESS LINES AT A COST OF ABOUT $1200 ( I AM NOT SURE OF THE TOTAL COST BECAUSE IT ALSO NEEDS A ANTILOCK BRAKING PUMP WHICH WAS BADLY CORRODED) THE FUEL LINGS ARE ALSO RUSTED AND NEED TO BE REPLACED AND ALSO THE TRANSMISSION COOLING LINES NEED TO BE REPLACED AT A COST TO BE DETERMINED LATER. I HAVE A 1953 CHEVY PICKUP THAT STILL HAS GOOD BRAKE LINES AND THE FRAME IS IN BETTER SHAPE THAN THE NEWER ONES, IF GM LOOKED TO THE PAST AT THE MATERIALS & METHODS THEY MIGHT BUILD A BETTER PRODUCT RATHER THAN THE GARBAGE THEY PRODUCE NOW! I AM GLAD I DIDN'T PAY $30-$60,000 FOR THIS TRUCK.

NHTSA ODI #11052388

119,618 miles · Nov 22, 2016
Service Brakes

ANTI-LOCK BRAKES ENGAGE ON DRY PAVEMENT JUST PRIOR TO COMING TO A COMPLETE STOP.

NHTSA ODI #10927476

16,000 miles · May 29, 2015
Service Brakes

I HAVE OWNED MANY GM TRUCKS, AND NEVER HAD ONE WITH SO MANY RUSTED OUT BRAKE LINES. WHY CAN'T THEY MAKE THEM WITH STAINLESS STEEL LINES. THEY SHOULD HAVE A RECALL FOR THIS. WHAT HAPPENS WHEN FRONT AND BACK LINES GO AT THE SAME TIME, I WILL TELL YOU, NO BRAKES ! THIS IS THE WORST ONE WITH THE RUST THAT I HAVE HAD. 3 LINES RUST OU…

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I HAVE OWNED MANY GM TRUCKS, AND NEVER HAD ONE WITH SO MANY RUSTED OUT BRAKE LINES. WHY CAN'T THEY MAKE THEM WITH STAINLESS STEEL LINES. THEY SHOULD HAVE A RECALL FOR THIS. WHAT HAPPENS WHEN FRONT AND BACK LINES GO AT THE SAME TIME, I WILL TELL YOU, NO BRAKES ! THIS IS THE WORST ONE WITH THE RUST THAT I HAVE HAD. 3 LINES RUST OUT ON THE GMC 2500 HD (2002) WITH MORE TO COME, I HAVE 25,000 MILES ON THIS TRUCK. THE FIRST LINE WENT ABOUT 15,000 MILES. ALSO I ONLY GOT ABOUT 5,000 MILES ON THOSE FIRESTONE TIRES, CHEAP TIRES COME WITH THIS TRUCK. I HAVE ALSO NOTICED THE FRAME IS RUSTING, HAD TO HAVE THE CABLE REPLACED THAT SHIFTS THE TRUCK INTO GEAR, IT RUSTED OUT. I GO TO THE CAR WASH AND ALWAYS WASH THE UNDERSIDE OF THE TRUCK TO GET ALL THE DIRT AND SALT OFF EVERY CHANCE I GET. WHEN I GOT THE GMC I WAS TOLD BY THE GMC GARAGE NOT TO HAVE THE TRUCK UNDERCOATED BECAUSE IT WOULD VOID THE WARRANTY ON IT. I ALSO HAD TO HAVE THE CABLES REPLACED ON THE TAIL GATE DUE TO RUST. VERY SAD ABOUT THIS GMC TRUCK. EVERYTHING IS RUSTING. I SHOULD HAVE A LOT OF MILES LEFT ON THIS TRUCK, IF IT DOESN'T RUST ITSELF TO DEATH OR GET ME KILLED BECAUSE OF RUSTED OUT BRAKE LINES !

NHTSA ODI #10722138

305,000 miles · May 9, 2015
Service Brakes

REAR STEEL BRAKE LINE FAILURE WHILE IN PARKING LOT, COMPLETE LOSS OF BRAKING ABILITY

NHTSA ODI #10715461

60,000 miles · Apr 24, 2015
Service Brakes

TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT STATED THAT WHILE DRIVING 5 MPH, WHEN THE BRAKE PEDAL WAS DEPRESSED AND THE BRAKES FAILED. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 60,000.

NHTSA ODI #10712739

94,650 miles · Feb 28, 2015
Fuel/propulsion SystemService Brakes

DRIVING INTO DRIVEWAY APPLIED BRAKES , PEDAL WENT RIGHT TO THE FLOOR NO WARNING LIGHT OR ANY INDICATION OF A PROBLEM GOT OUT OF TRUCK AND FOUND FLUID DRIPPING OFF FRAME BY FUEL TANK. RUPTURED LINE ABOVE TANK ON FRAME, OTHER BRAKE LINES ALSO LOOK CORRODED. AFTER SOME RESEARCH I FOUND THIS TO BE A COMMON PROBLEM ON GM TRUCKS . …

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DRIVING INTO DRIVEWAY APPLIED BRAKES , PEDAL WENT RIGHT TO THE FLOOR NO WARNING LIGHT OR ANY INDICATION OF A PROBLEM GOT OUT OF TRUCK AND FOUND FLUID DRIPPING OFF FRAME BY FUEL TANK. RUPTURED LINE ABOVE TANK ON FRAME, OTHER BRAKE LINES ALSO LOOK CORRODED. AFTER SOME RESEARCH I FOUND THIS TO BE A COMMON PROBLEM ON GM TRUCKS . OWNERS NEED TO BE MADE AWARE OF THIS PROBLEM BEFORE SOMEONE IS SERIOUSLY HURT. I BELIEVE GM SHOULD BE FORCED TO REPAIR THE DEFECTIVE LINES. *TR

NHTSA ODI #10691237

278,000 miles · Nov 4, 2014
Service Brakes

DRIVING DOWN RURAL ROAD AT 55MPH, A DEER JUMPS INTO MY PATH. I QUICKLY BRAKE, ABS ACTIVATES AND PEDAL DROPS TO NEAR FLOOR. TRUCK DOES STOP, BUT BRAKING MUCH MORE DIFFERENT THAN NORMAL. DEER MOVES ON AND I START MOVING AGAIN. NEXT STOP SIGN I NOTICE THAT BRAKE PEDAL DROPS TO FLOOR, STILL BRAKING, BUT MUCH MORE DIFFICULT TO BRAKE.…

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DRIVING DOWN RURAL ROAD AT 55MPH, A DEER JUMPS INTO MY PATH. I QUICKLY BRAKE, ABS ACTIVATES AND PEDAL DROPS TO NEAR FLOOR. TRUCK DOES STOP, BUT BRAKING MUCH MORE DIFFERENT THAN NORMAL. DEER MOVES ON AND I START MOVING AGAIN. NEXT STOP SIGN I NOTICE THAT BRAKE PEDAL DROPS TO FLOOR, STILL BRAKING, BUT MUCH MORE DIFFICULT TO BRAKE. I MADE IT HOME AND NOTICED MY BRAKE LINE DIRECTLY UNDER THE DRIVER POSITION WAS SPRAYING FLUID NOW. *TR

NHTSA ODI #10652610

145,000 miles · Nov 4, 2014
Service Brakes

PULLING OUT OF MY DRIVEWAY ONTO THE STREET. APPLIED THE BRAKES WHEN REACHING THE END OF THE DRIVEWAY AND BRAKE PEDAL WHEN COMPLETELY TO THE FLOOR. WAS ABLE TO STOP, BEING THAT I WAS ONLY GOING AROUND 2 MPH AT THE TIME. WHEN I GOT OUT OF THE TRUCK, I SAW A LARGE AMOUNT OF BRAKE FLUID ON THE DRIVEWAY FROM A BURST BRAKE LINE. *TR

NHTSA ODI #10652609

128,000 miles · Sep 12, 2014
Service Brakes

BRAKES FAILED WHILE DRIVING DOWN ROAD. ALL BRAKE LINES ARE SEVERELY RUSTED. IS THEIR A GALVANIC REACTION BETWEEN LINES AND TRUCK THAT IS CAUSING THIS? HAVE NEVER HAD BRAKE LINES RUST AS BADLY ON OTHER VEHICLES THAT WERE OLDER THAN THIS ONE. *TR

NHTSA ODI #10632686

100,108 miles · Sep 6, 2014
Service Brakes

I HAD BEEN DRIVING FOR 15-20 MILES BOTH ON AND OFF THE HIGHWAY AND THE VEHICLE STOPPED FINE. I WAS TRAVELING AT ABOUT 60 MPH AND WAS COMING UP ON HIGHWAY TRAFFIC THAT WAS AT A STANDSTILL . I STEPPED ON THE BRAKE PEDDLE AND IT WENT STRAIT TO THE FLOOR, ABSOLUTELY NO BRAKES AT ALL AND NO EVEN A HINT THIS WAS ABOUT TO HAPPEN. …

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I HAD BEEN DRIVING FOR 15-20 MILES BOTH ON AND OFF THE HIGHWAY AND THE VEHICLE STOPPED FINE. I WAS TRAVELING AT ABOUT 60 MPH AND WAS COMING UP ON HIGHWAY TRAFFIC THAT WAS AT A STANDSTILL . I STEPPED ON THE BRAKE PEDDLE AND IT WENT STRAIT TO THE FLOOR, ABSOLUTELY NO BRAKES AT ALL AND NO EVEN A HINT THIS WAS ABOUT TO HAPPEN. I WAS ABLE TO SWERVE OUT OF THE WAY, NARROWLY MISSING THE VEHICLE IN FRONT OF ME, AND USED THE TRANSMISSION AND E BRAKE TO GET THE VEHICLE STOPPED ON A GRASSY SHOULDER. HAD A VEHICLE BEEN NEXT TO ME OR A LESS EXPERIENCED DRIVER BEEN BEHIND THE WHEEL, IT MAY HAVE BEEN A MUCH WORSE OUTCOME . I KNOW AT LEAST 10 PEOPLE WHO OWN SIMILAR VEHICLES AND EVERYONE HAS HAD A BRAKE LINE FAILURE AT SOME POINT. GM NEEDS TO STEP UP AND COVER THIS BEFORE SOMEONE ELSE GET HURT OR KILLED! *TR

NHTSA ODI #10631205

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.