NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
44 reportsClear category filter143,000 miles · Oct 1, 2012
Service BrakesService Brakes, HydraulicCrash
I WAS DRIVING MY 2002 GMC SIERRA 2500 HD ON I95 WHEN TRAFFIC CAME TO A SUDDEN STOP. I SLAMMED ON THE BRAKES AT WHICH POINT THE ABS SYSTEM STARTED PULSING THE BRAKES, BUT THE BRAKE PEDAL SUDDENLY WENT TO THE FLOOR WITH NO FURTHER BRAKE RESPONSE. THANKFULLY, THE BRAKES SLOWED THE TRUCK ENOUGH PRIOR TO FAILURE TO PREVENT A COLLIS…
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I WAS DRIVING MY 2002 GMC SIERRA 2500 HD ON I95 WHEN TRAFFIC CAME TO A SUDDEN STOP. I SLAMMED ON THE BRAKES AT WHICH POINT THE ABS SYSTEM STARTED PULSING THE BRAKES, BUT THE BRAKE PEDAL SUDDENLY WENT TO THE FLOOR WITH NO FURTHER BRAKE RESPONSE. THANKFULLY, THE BRAKES SLOWED THE TRUCK ENOUGH PRIOR TO FAILURE TO PREVENT A COLLISION AT 65 MPH. I HIT THE CAR IN FRONT OF ME AT ~5-10 MPH, CAUSING BUMPER DAMAGE TO MY TRUCK AND THE CAR IN FRONT OF ME. I WAS ABLE TO GET THE CAR TO THE SIDE OF THE ROAD AND TO MY HORROR I HAD NO BRAKES. THE VEHICLE WAS TOWED TO A LOCAL AUTHORIZED GMC DEALER WHO HAS MAINTAINED THE TRUCK FOR ME. THEY CONFIRMED THAT THE BRAKE LINES CATASTROPHICALLY FAILED WHEN I SLAMMED ON THE BRAKES. THE RUSTED BRAKE LINES BURST WHEN I SLAMMED ON THE BRAKES. THEY INDICATED THAT ALL OF THE BRAKE LINES HAD TO BE REPLACED DO TO RUST THROUGHOUT. I CAN'T BELIEVE I HAVE BEEN DRIVING THIS TRUCK AROUND WITH A PENDING CATASTROPHIC BRAKE FAILURE WITHOUT WARNING FROM GM OR THE SERVICING DEALER. IF THE WORD IS NOT PUT OUT TO OWNERS OF AFFECTED GMC TRUCK, LIVES WILL BE LOST. I SHUDDER TO THINK WHAT COULD HAVE HAPPENED IF I HAD BEEN PULLING UP TO A PEDESTRIAN FILLED CROSSWALK WHEN THE FAILURE OCCURRED. UPDATED 10/03/12*LJ *TR
NHTSA ODI #10478215
68,000 miles · Mar 3, 2012
Service Brakes, Hydraulic
BRAKE LINE FAILURE DUE TO RUST. ALL BRAKE LINES HAD TO BE REPLACED. *TR
NHTSA ODI #10450168
Mileage unknown · Jan 21, 2012
Service Brakes, HydraulicCrashInjury
GMC SIERRA 2500 HD 2002 ROTTED BRAKE LINES FAILURE CAUSED $4500 IN DAMAGE TO THE TRUCK . WRIST INJURY TO MY WIFE. OIL AND TRANNY FLUID ALL OVER DRIVEWAY STAINED. $5000 IN DAMAGE TO MY VW BEETLE RESULTING IN A TOTAL LOSS TO THIS VEHICLE!!!! *TR
NHTSA ODI #10444734
155,000 miles · Dec 6, 2011
Service Brakes, Hydraulic
BRAKE LINES ARE SEVERELY CORRODED AND LOOK READY TO FAIL, AND I FIND OUT THAT THIS IS A COMMON COMPLAINT AND ALL THE BRAKE LINES SHOULD AND MUST BE REPLACED BY GENERAL MOTORS. THE GMC AND CHEVROLET 2500HD MODELS ARE NOTORIOUS FOR THIS MALADY, AND THE NTSB SHOULD DO THEIR JOB AND FORCE GM TO REPLACE AT NO CHARGE, THE VEHICLES BRA…
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BRAKE LINES ARE SEVERELY CORRODED AND LOOK READY TO FAIL, AND I FIND OUT THAT THIS IS A COMMON COMPLAINT AND ALL THE BRAKE LINES SHOULD AND MUST BE REPLACED BY GENERAL MOTORS. THE GMC AND CHEVROLET 2500HD MODELS ARE NOTORIOUS FOR THIS MALADY, AND THE NTSB SHOULD DO THEIR JOB AND FORCE GM TO REPLACE AT NO CHARGE, THE VEHICLES BRAKE LINES. *TR
NHTSA ODI #10438768
175,000 miles · Oct 13, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500. WHILE DRIVING IN REVERSE AT APPROXIMATELY 5 MPH THE CONTACT DEPRESSED THE BRAKE PEDAL AND IT DROPPED TO THE FLOOR. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE TO A REPAIR SHOP. THE MECHANIC STATED THE BRAKE LINES WERE CORRODED AND HAD TO BE REPLACED. THERE WAS AN INVESTIGATION UNDER NHT…
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TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500. WHILE DRIVING IN REVERSE AT APPROXIMATELY 5 MPH THE CONTACT DEPRESSED THE BRAKE PEDAL AND IT DROPPED TO THE FLOOR. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE TO A REPAIR SHOP. THE MECHANIC STATED THE BRAKE LINES WERE CORRODED AND HAD TO BE REPLACED. THERE WAS AN INVESTIGATION UNDER NHTSA ACTION NUMBER: PE10010 (SERVICE BRAKES, HYDRAULIC SERVICE BRAKES, HYDRAULIC:POWER ASSIST:HYDRAULIC:HOSES, LINES/PIPING, AND FITTINGS) THAT MAY BE RELATED TO THE FAILURE. THE VEHICLE WAS REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 175,000.
NHTSA ODI #10430020
66,750 miles · Sep 1, 2011
Service Brakes, Hydraulic
A BREAK LINE RUPTURED RESULTING IN LOSS OF FLUID AND DIMINISHED BREAKING. FORTUNATELY IT DID NOT RESULT IN A CATASTROPHIC LOSS IN BREAKING AT A CRITICAL TIME. THE RUPTURED LINE IS NEAR THE GAS TANK AND AT FIRST APPEARED TO BE A GAS LEAK. UPON INSPECTION ALL BREAK LINES ARE SUBSTANTIALLY RUSTED AND MUST BE REPLACED TO MAINTAIN S…
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A BREAK LINE RUPTURED RESULTING IN LOSS OF FLUID AND DIMINISHED BREAKING. FORTUNATELY IT DID NOT RESULT IN A CATASTROPHIC LOSS IN BREAKING AT A CRITICAL TIME. THE RUPTURED LINE IS NEAR THE GAS TANK AND AT FIRST APPEARED TO BE A GAS LEAK. UPON INSPECTION ALL BREAK LINES ARE SUBSTANTIALLY RUSTED AND MUST BE REPLACED TO MAINTAIN SAFETY. ONE RUSTY LINE COULD INDICATE DAMAGE OR A SINGLE DEFECTIVE PART. 100% OF THE LINES BEING CORRODED TO AN UNSAFE LEVEL INDICATES SUBSTANDARD PARTS. THE REAR DISC BREAKS HAVE BEEN A CONSTANT PROBLEM WITH CORROSION OF SLIDING PARTS RESULTING IN CALIPERS NOT MOVING FREELY. THE SPONGY FEEL TO THE BREAKS WAS ATTRIBUTED TO STICKING OF THE REAR CALIPERS RATHER THAN A FLUID LEAK. ANNUAL LUBRICATION AND A TOTAL REPLACEMENT OF REAR BREAKS HAS BECOME NORMAL PRACTICE. THE POOR REAR BREAKS CAN LEAD ONE TO NOT NOTICE A SLOW LEAK OF BREAK FLUID UNTIL A TOTAL LOSS OF BREAKING ACTION. THE SLIGHT EXTRA COST FOR CORROSION RESISTANT BREAK PARTS COULD SAVE LIVES.
NHTSA ODI #10423648
101,000 miles · Aug 4, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT STATED THAT THE BRAKE LINES BROKE AS A RESULT OF CORROSION. THE VEHICLE WAS NOT TAKEN TO THE DEALER. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE AND CURRENT MILEAGE WAS 101,000. UPDATED 9/13/11 *CN UPDATED 11/23/11
NHTSA ODI #10417111
114,513 miles · Jul 19, 2011
Service Brakes, Hydraulic
DURING ROUTINE MAINTENANCE IN THE SHOP THE TRUCK WAS STARTED TO MOVE IT AND THE BRAKE LINE BURST NEAR THE POINT THE BRAKE LINE EXITS THE FRAME RAIL NEAR THE REAR AXLE. ALL REAR BRAKING WAS LOST. IF THIS HAD OCCURRED ON THE HIGHWAY IT COULD HAVE BEEN A CATASTROPHIC EVENT. *KB
NHTSA ODI #10413575
37,108 miles · Jun 2, 2011
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500. WHILE DRIVING APPROXIMATELY 50 MPH THE CONTACT DEPRESSED THE BRAKE PEDAL AND FELT THE BRAKE PEDAL FALL DOWN TO THE FLOOR BOARD. THE CONTACT WAS ABLE TO DRIVE ONTO THE SIDE OF THE ROAD. THE CONTACT NOTICED FLUID SQUIRTING OUT OF THE BRAKE LINE. THE CONTACT REFILLED THE MASTER CYLIN…
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TL*THE CONTACT OWNS A 2002 GMC SIERRA 2500. WHILE DRIVING APPROXIMATELY 50 MPH THE CONTACT DEPRESSED THE BRAKE PEDAL AND FELT THE BRAKE PEDAL FALL DOWN TO THE FLOOR BOARD. THE CONTACT WAS ABLE TO DRIVE ONTO THE SIDE OF THE ROAD. THE CONTACT NOTICED FLUID SQUIRTING OUT OF THE BRAKE LINE. THE CONTACT REFILLED THE MASTER CYLINDER WITH BRAKE FLUID AND DROVE THE VEHICLE HOME. THE VEHICLE WAS TAKEN TO THE DEALER WHERE THE TECHNICIANS STATED THE FRONT AND REAR BRAKE LINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED BY THE DEALER. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE FRONT AND REAR BRAKE LINES WERE REPLACED. THE APPROXIMATE FAILURE MILEAGE WAS 37,108.
NHTSA ODI #10404212
88,000 miles · Apr 25, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT STATED THAT THE ABS ACTIVATED INDEPENDENTLY AT REDUCED SPEEDS WHEN COMING TO A COMPLETE STOP. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP BUT THE VEHICLE WAS NOT INSPECTED OR REPAIRED. THE CONTACT CALLED THE MANUFACTURER WHO ADVISED THAT THE VEHICLE WAS NOT INCLUDED IN…
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TL* THE CONTACT OWNS A 2002 GMC SIERRA 2500 HD. THE CONTACT STATED THAT THE ABS ACTIVATED INDEPENDENTLY AT REDUCED SPEEDS WHEN COMING TO A COMPLETE STOP. THE VEHICLE WAS TAKEN TO A LOCAL REPAIR SHOP BUT THE VEHICLE WAS NOT INSPECTED OR REPAIRED. THE CONTACT CALLED THE MANUFACTURER WHO ADVISED THAT THE VEHICLE WAS NOT INCLUDED IN THE RECALL UNDER NHTSA CAMPAIGN ID NUMBER: 05V379000 (SERVICE BRAKES, HYDRAULIC: ANTILOCK). THE VEHICLE WAS NOT REPAIRED. THE CURRENT MILEAGE WAS APPROXIMATELY 89,000 AND THE FAILURE MILEAGE WAS APPROXIMATELY 88,000. UPDATED 06/01/11*LJ UPDATED 06/02/11
NHTSA ODI #10397355
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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