NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
134 reports43,000 miles · May 10, 2007
Engine And Engine Cooling
BATTERY LIGHT CAME ON IN MESSAGE CENTER AND ENGINE CUT OFF, DISABLING STEERING AND BRAKES. NEARLY AVOIDED ACCIDENT ON HIGHWAY AS VEHICLE HAD TO CUT OVER TO LANES INTO DIRT SHOULDER TO STOP. VE CRANKSHAFT SENSOR HAD TO BE REPLACED, AND A NEW DIAGNOSTIC CODE ENTERED IN THE VEHICLE. FOUND 3 OTHER ODI'S WITH EXACT SAME PROBLEM, 1…
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BATTERY LIGHT CAME ON IN MESSAGE CENTER AND ENGINE CUT OFF, DISABLING STEERING AND BRAKES. NEARLY AVOIDED ACCIDENT ON HIGHWAY AS VEHICLE HAD TO CUT OVER TO LANES INTO DIRT SHOULDER TO STOP. VE CRANKSHAFT SENSOR HAD TO BE REPLACED, AND A NEW DIAGNOSTIC CODE ENTERED IN THE VEHICLE. FOUND 3 OTHER ODI'S WITH EXACT SAME PROBLEM, 10159068,10174007, AND 10164369.*AK
NHTSA ODI #10190418
34,000 miles · May 10, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT FELT THE VEHICLE'S BRAKES PULSATE. HE TOOK THE VEHICLE TO THE DEALER WHO DISCOVERED THAT THE ROTORS WERE CORRODED, THE FRONT WHEEL HUBS WERE FILLED WITH WATER, THE ABS SENSORS WERE CORRODED, AND THE ENTIRE BRAKING SYSTEM NEEDED TO BE REPLACED. THE CURRENT AND FAILURE …
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TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT FELT THE VEHICLE'S BRAKES PULSATE. HE TOOK THE VEHICLE TO THE DEALER WHO DISCOVERED THAT THE ROTORS WERE CORRODED, THE FRONT WHEEL HUBS WERE FILLED WITH WATER, THE ABS SENSORS WERE CORRODED, AND THE ENTIRE BRAKING SYSTEM NEEDED TO BE REPLACED. THE CURRENT AND FAILURE MILEAGES WERE 34,000.
NHTSA ODI #10190412
Mileage unknown · Apr 3, 2007
Fuel System, GasolineParking Brake
2002 GMC SIERRA 2500 CREW CAB CUSTOMER STATES THAT THE VEHICLE WAS TAKEN TO THE DEALER FOR STARTING PROBLEMS THEN FOUND OUT ABOUT RECALL ON EMERGENCY BRAKE AFTER HAVING THE WORK DONE HE FOUND OUT THAT THE LEFT SIDE BRAKE CABLE WAS NOT INCLUDED ONLY THE RIGHT SIDE CABLE WAS INCLUDED.**CC THE CONSUMER WAS TOLD THAT THE STARTING …
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2002 GMC SIERRA 2500 CREW CAB CUSTOMER STATES THAT THE VEHICLE WAS TAKEN TO THE DEALER FOR STARTING PROBLEMS THEN FOUND OUT ABOUT RECALL ON EMERGENCY BRAKE AFTER HAVING THE WORK DONE HE FOUND OUT THAT THE LEFT SIDE BRAKE CABLE WAS NOT INCLUDED ONLY THE RIGHT SIDE CABLE WAS INCLUDED.**CC THE CONSUMER WAS TOLD THAT THE STARTING PROBLEM WAS DUE TO A LEAKING FUEL FILER, WHICH THEY REPLACED. *JB
NHTSA ODI #10187926
37,300 miles · Dec 27, 2006
Exterior LightingPower TrainService Brakes, Hydraulic
TL* - THE CONTACT CALLED ABOUT 2002 GMC SIERRA 2500 HD. HE STATED THAT WHILE APPLYING BRAKES, 7 OUT OF 10 TIMES THE ABS SYSTEM ACTIVATE\D AND PUMPED THE BRAKES. THIS HAPPENED AT ANY TIME OF THE DAY, AND IN ALL WEATHER CONDITIONS. THE CONTACT STATED THAT THIS HAPPENED WHEN APPLYING BRAKES AT ANY SPEED. THE BRAKES PUSHED BAC…
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TL* - THE CONTACT CALLED ABOUT 2002 GMC SIERRA 2500 HD. HE STATED THAT WHILE APPLYING BRAKES, 7 OUT OF 10 TIMES THE ABS SYSTEM ACTIVATE\D AND PUMPED THE BRAKES. THIS HAPPENED AT ANY TIME OF THE DAY, AND IN ALL WEATHER CONDITIONS. THE CONTACT STATED THAT THIS HAPPENED WHEN APPLYING BRAKES AT ANY SPEED. THE BRAKES PUSHED BACK AND THERE WAS A THUMPING NOISE COMING FROM THE MASTER CYLINDER. THE CONTACT LOOKED UP INFORMATION FROM THE NHTSA WEBSITE AND FOUND THAT A RECALL 05V379000 HAD BEEN ISSUED FOR THIS VEHICLE. THE CONTACT SAID THAT HE TOOK VEHICLE TO THE DEALERSHIP, AND WAS TOLD THAT THIS VEHICLE DID NOT FALL UNDER THE RECALL DUE TO VIN. *AK THE INNER TIE ROD HAD EXCESSIVE PLAY, THE FRONT DIFFERENTIAL SEAL WAS LEAKING FROM THE VENT CAP, THE DAYTIME RUNNING LIGHT BULB WAS INOPERATIVE. THE CONSUMER DENIED TO HAVE REPAIRS MADE. UPDATED 01/29/07. *JB
NHTSA ODI #10177052
70,000 miles · Dec 9, 2006
Service Brakes, Hydraulic
UPON BRAKING UP TO A STOP SIGN FOR INSTANCE. THE VEHICLES ABS WILL KICK IN AT THE LAST MINUTE RELEASING THE LEFT FRONT WHEEL CAUSING THE VEHICLE TO DIVE TO THE RIGHT. THIS HAPPENS IN WET OR DRY CONDITION BUT IS PARTICULARLY BAD IN ICY CONDITIONS. *NM
NHTSA ODI #10175650
32,000 miles · Nov 21, 2006
Engine And Engine CoolingPower Train
DT*: THE CONTACT STATED THE VEHICLE STALLED WHILE IN GEAR ON FOUR OCCASIONS. THE VEHICLE HAD NOT BEEN TO A SERVICE DEALER TO RESOLVE THE ISSUE. THE CONTACT EXPRESSED CONCERN THAT THIS WAS A DEFECT.*AK THE CRANKSHAFT POSITION SENSOR WAS REPLACED. UPDATED 12/15/06. *JB
NHTSA ODI #10174007
32,143 miles · Nov 6, 2006
Service Brakes, Hydraulic
DT*: THE CONTACT STATED WHILE TRAVELING 45 MPH UNDER NORMAL ROAD CONDITIONS, THE HYDRAULIC REAR BRAKE ROTORS RUSTED, AND STOPPING DISTANCE WAS INCREASED. THERE WERE NO WARNINGS PRIOR TO THE FAILURE. THE NATURE OF THE FAILURE WAS PERMANENT GRADUAL WORSENING. THE CONSUMER STATED THE REAR ROTORS HAD RUSTED SO BADLY THAT THEY FLA…
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DT*: THE CONTACT STATED WHILE TRAVELING 45 MPH UNDER NORMAL ROAD CONDITIONS, THE HYDRAULIC REAR BRAKE ROTORS RUSTED, AND STOPPING DISTANCE WAS INCREASED. THERE WERE NO WARNINGS PRIOR TO THE FAILURE. THE NATURE OF THE FAILURE WAS PERMANENT GRADUAL WORSENING. THE CONSUMER STATED THE REAR ROTORS HAD RUSTED SO BADLY THAT THEY FLAKED OFF IN PIECES. UPDATED 11/30/06. *JB
NHTSA ODI #10172747
60,000 miles · Oct 27, 2006
Power Train
I OWN A 2002 GMC SIERRA 4 X 4 CREW CAB DURAMAX DIESEL PICK-UP TRUCK. FOR THE LAST 2 YEARS I'VE HAD A CONDITION THAT FELT LIKE A TIRE WAS OUT OF BALANCE. THIS WAS JUST AFTER I REPLACED ALL TIRES. THIS YEAR I REPLACED ALL THE TIRES AGAIN AND THE CONDITION STILL EXISTS. WE WENT THROUGH THE PROCESS OF ELIMINATION, CHANGING A WHEEL T…
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I OWN A 2002 GMC SIERRA 4 X 4 CREW CAB DURAMAX DIESEL PICK-UP TRUCK. FOR THE LAST 2 YEARS I'VE HAD A CONDITION THAT FELT LIKE A TIRE WAS OUT OF BALANCE. THIS WAS JUST AFTER I REPLACED ALL TIRES. THIS YEAR I REPLACED ALL THE TIRES AGAIN AND THE CONDITION STILL EXISTS. WE WENT THROUGH THE PROCESS OF ELIMINATION, CHANGING A WHEEL THAT WAS A LITTLE OUT OF ROUND, RE-BALANCING AND ROTATING THE NEW TIRES 4 DIFFERENT TIMES AND COULDN'T ELIMINATE THE PROBLEM. I THEN PUT THE VEHICLE UP ON A HOIST AND PUT THE TRANSMISSION IN GEAR TO CHECK FOR DRIVE LINE VIBRATIONS AND FOUND THAT THE REAR DRIVE SHAFT WAS BENT. AFTER TAKING THE TRUCK BACK TO MY DEALERSHIP AND CONFIRMING THE PROBLEM WITH THEM, A SEARCH WAS RUN OF ALL THE SALVAGE FACILITIES FOR A USED SHAFT AND FOUND THAT THERE WERE NONE AVAILABLE. FURTHERMORE, EVERY SALVAGE YARD THAT WAS CONTACTED CLAIMED THAT THIS DRIVE SHAFT, GM PART #15109384 WAS IN HIGH DEMAND AND AS SOON AS ONE CAME IN ON A WRECK, IT WAS IMMEDIATELY SOLD. THIS SHAFT IS INSTALLED ON 2000 TO 2007 MODELS. MY DEALERSHIP ALSO ADMITTED THAT MINE WAS NOT THE FIRST BENT DRIVE SHAFT THAT HAS COME INTO THEIR FACILITY. TO PURCHASE A NEW SHAFT IS ALMOST $900. A USED ONE IS MUCH LESS, IF YOU CAN FIND ONE. I WORKED WITH GM TRUCK IN QUALITY CONTROL FOR 31 YEARS AND IT IS MY EXPERIENCE THAT WHEN A USED PART CAN NOT BE PURCHASED THROUGH A SALVAGE YARD DUE TO HIGH REPLACEMENT DEMAND, THERE IS USUALLY A COVER UP GOING ON. PLEASE LOOK INTO THIS MATTER. BY THE WAY, MY SHAFT HAD NO VISIBLE EVIDENCE OF DAMAGE ANYPLACE. I BELIEVE THAT THE SHAFT MAY NOT BE ABLE TO HANDLE THE TORQUE OF THE ENGINE AND WILL, IN TIME, BEND. MY TRUCK HAS 99,000 MILES ON IT NOW, BUT THE PROBLEM STARTED SOMETIME AROUND 60,000. *NM
NHTSA ODI #10172005
40,000 miles · Sep 26, 2006
Engine And Engine Cooling
DT*: THE CONTACT STATED THE VEHICLE STALLED WHILE IN GEAR OR IN THE IDLE POSITION. THIS WAS A CONSISTENT PROBLEM FOR OVER ONE AND A HALF YEARS. THE VEHICLE WAS TAKEN TO THE SERVICE DEALER IN APRIL AS WELL, AND THE PROBLEM COULD NOT BE IDENTIFIED.
NHTSA ODI #10169358
46,500 miles · Sep 22, 2006
Service Brakes, Hydraulic
WHEN I PULLED INTO A LEFT TURN LANE AND TRIED TO APPLY THE BRAKES THE PEDAL WENT NEARLY TO THE FLOOR AND I HAD NO BRAKES LUCKILY THERE WERE NO OTHER CARS ON THE ROAD OR IN THE INTERSECTION AT THE TIME SO I WENT ON THROUGH AND THERE WAS NO ACCIDENT, I WAS CAMPING AT THE TIME AND I GOT THE TRUCK BACK TO THE CAMPGROUND WHEN I BAC…
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WHEN I PULLED INTO A LEFT TURN LANE AND TRIED TO APPLY THE BRAKES THE PEDAL WENT NEARLY TO THE FLOOR AND I HAD NO BRAKES LUCKILY THERE WERE NO OTHER CARS ON THE ROAD OR IN THE INTERSECTION AT THE TIME SO I WENT ON THROUGH AND THERE WAS NO ACCIDENT, I WAS CAMPING AT THE TIME AND I GOT THE TRUCK BACK TO THE CAMPGROUND WHEN I BACKED THE TRUCK INTO THE CAMPSITE AND APPLIED THE BRAKES THEY STARTED WORKING NORMALLY, I TOOK THE TRUCK TO THE DEALER AND THEY SAID THAT THEY COULD FIND NOTHING WRONG THEY EVEN SAID THAT THEY HAVE HAD SEVERAL OTHER VEHICLES DO THE SAME THING AND COULD NOT FIND ANYTHING WRONG WITH THEM AND THAT THIS PROBLEM WAS NORMAL FOR THE VEHICLE. *NM
NHTSA ODI #10168971
NHTSA investigations
3EA07013 · 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.
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