NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
117 reportsClear category filter70,000 miles · Dec 1, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. UPON ENTERING THE VEHICLE HE STEPPED ON THE BRAKE PEDAL AND THE PEDAL DEPRESSED TO THE FLOOR. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE HE WAS INFORMED THAT THE BRAKE LINES WERE CORRODED. THE VEHICLE WAS IN THE PROCESS OF BEING REPAIRED. THE FAILURE AND CURREN…
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TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. UPON ENTERING THE VEHICLE HE STEPPED ON THE BRAKE PEDAL AND THE PEDAL DEPRESSED TO THE FLOOR. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE HE WAS INFORMED THAT THE BRAKE LINES WERE CORRODED. THE VEHICLE WAS IN THE PROCESS OF BEING REPAIRED. THE FAILURE AND CURRENT MILEAGES WERE 70,000.
NHTSA ODI #10368472
48,000 miles · Nov 27, 2010
Service Brakes, Hydraulic
THE BRAKE LINES ON THE VEHICLE RUSTED OUT CAUSING BRAKE FAILURE WHILE OPERATING. I HAD TO HAVE ALL THE BRAKE LINES REPLACED. YOU CAN SEE THEIR IS A PROBLEM WITH A SIMPLE SEARCH ON THE INTERNET. HTTP://TRUCKS.ABOUT.COM/B/2010/11/09/BRAKE-LINE-CORROSION-SUSPECTED-IN-GM-TRUCKS.HTM. *TR
NHTSA ODI #10367958
62,000 miles · Oct 9, 2010
Service Brakes, Hydraulic
WITHOUT WARNING MY 2002 CHEVY 2500HD LOST IT'S BRAKES ALMOST CAUSING AN ACCIDENT. I FOUND THAT THE BRAKE LINES HAD RUSTED UNDER THE LEFT WHEEL WELL. I CALLED CHEVY AND THEY STATED THAT IT WAS NOT A KNOWN ISSUE. THEY REFUSED TO HELP OR DISCUSS THE ISSUE WITH ME. I ASKED TO SPEAK TO A SUPERVISOR AND THE TOLD ME THAT THERE WAS NO …
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WITHOUT WARNING MY 2002 CHEVY 2500HD LOST IT'S BRAKES ALMOST CAUSING AN ACCIDENT. I FOUND THAT THE BRAKE LINES HAD RUSTED UNDER THE LEFT WHEEL WELL. I CALLED CHEVY AND THEY STATED THAT IT WAS NOT A KNOWN ISSUE. THEY REFUSED TO HELP OR DISCUSS THE ISSUE WITH ME. I ASKED TO SPEAK TO A SUPERVISOR AND THE TOLD ME THAT THERE WAS NO ONE ELSE I COULD SPEAK TO. AFTER DOING SOME RESEARCH ONLINE I FOUND THAT IT HAS BEEN WIDELY REPORTED. *TR
NHTSA ODI #10359896
117,073 miles · Sep 28, 2010
Service Brakes, Hydraulic
BRAKE LINE FOLLOWING FRAME ALONG DRIVER'S SIDE RUPTURED CAUSING HISSING AND LOSS OF BRAKE FLUID AROUND THE REAR WHEEL WELL. BRAKE LINE CORRODED. PEDAL WENT TO THE FLOOR WITH NO BRAKING TO STOP THE VEHICLE. SLOWED WITH LOSS OF MOMENTUM AND PUMPING THE BRAKE PEDAL. *TR
NHTSA ODI #10358160
48,000 miles · Sep 13, 2010
Service Brakes, Hydraulic
BRAKE LINE FAILURE AND LOSS OF BRAKING DUE TO CORROSION OF REAR BRAKE LINES. BRAKE LINE WAS RUSTED COMPLETELY THRU. ALL BRAKE LINES HAVE SEVERE CORROSION. *TR
NHTSA ODI #10355165
65,000 miles · Aug 28, 2010
Service Brakes, Hydraulic
I AM THE ORIGINAL OWNER OF A 2002 CHEVY 2500HD PICKUP WITH 65,000 MILES. I EXPERIENCED A TOTAL FAILURE OF THE BRAKE SYSTEM ON 28 AUG 2010 DUE TO A RUPTURED BRAKE LINE. THE LEAKING LINE WAS IN THE VICINITY OF THE DRIVER'S DOOR AND ALL LINES WERE HEAVILY CORRODED. LEAK WAS LARGE ENOUGH TO FULLY DRAIN THE BRAKE FLUID RESERVOIR. FA…
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I AM THE ORIGINAL OWNER OF A 2002 CHEVY 2500HD PICKUP WITH 65,000 MILES. I EXPERIENCED A TOTAL FAILURE OF THE BRAKE SYSTEM ON 28 AUG 2010 DUE TO A RUPTURED BRAKE LINE. THE LEAKING LINE WAS IN THE VICINITY OF THE DRIVER'S DOOR AND ALL LINES WERE HEAVILY CORRODED. LEAK WAS LARGE ENOUGH TO FULLY DRAIN THE BRAKE FLUID RESERVOIR. FAILURE HAPPENED WHILE PARKING TRUCK AT HOME. NO ACCIDENT OCCURRED, BUT I WAS LUCKY. THIS FAILURE COULD HAVE CAUSED A FATAL ACCIDENT. REPAIR OF THIS DEFECT WILL REQUIRE REPLACEMENT OF ALL BRAKE LINES ON THE TRUCK. IN MY OPINION, THE ROOT CAUSE OF THIS BRAKE FAILURE IS A POOR CHOICE OF MATERIALS (PLAIN STEEL) FOR THE BRAKE LINES. CHEVY SHOULD HAVE USED A CORROSION RESISTANT MATERIAL. *TR
NHTSA ODI #10352533
83,861 miles · Aug 21, 2010
Service Brakes, Hydraulic
COMPLETE CORROSION OF BRAKE LINE AND FAILURE OF BRAKES. *TR
NHTSA ODI #10350875
24,500 miles · Aug 18, 2010
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, THE BRAKE PEDAL FELL MUCH FARTHER INTO THE FLOORBOARD THAN USUAL AND THE VEHICLE WOULD NOT DECREASE IN SPEED. THE BRAKE PEDAL WAS APPLIED NUMEROUS TIMES BEFORE COMING TO A STOP. THE CONTACT WAS ABLE TO RESUME WITH CAUTION…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE THE CONTACT WAS DRIVING APPROXIMATELY 25 MPH, THE BRAKE PEDAL FELL MUCH FARTHER INTO THE FLOORBOARD THAN USUAL AND THE VEHICLE WOULD NOT DECREASE IN SPEED. THE BRAKE PEDAL WAS APPLIED NUMEROUS TIMES BEFORE COMING TO A STOP. THE CONTACT WAS ABLE TO RESUME WITH CAUTION. THE VEHICLE WAS INSPECTED UPON ARRIVAL AT THE RESIDENCE TO FIND THE BRAKE FLUID LEAKING ONTO THE GROUND. THE VEHICLE WAS TOWED TO AN AUTHORIZED DEALER. THE CONTACT STATED THE VEHICLE WAS TAKEN AN INDEPENDENT MECHANIC PRIOR TO THE FAILURE FOR AN UNRELATED REPAIR WHERE THE TECHNICIAN DETECTED THE BRAKE LINE EXHIBITED SEVERE RUST CORROSION AND STATED THE VEHICLE WAS UNSAFE TO DRIVE. ALSO PREVIOUSLY, THE VEHICLE WAS TAKEN TO THE DEALER FOR A SECOND OPINION AND THEY INFORMED THAT THERE WAS NOT A PROBLEM WITH THE BRAKE LINE. THE CONTACT WAS WAITING ON A RESPONSE FROM THE DEALER REGARDING THE RECENT FAILURE AT THE TIME OF THE COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 24,500.
NHTSA ODI #10350261
63,000 miles · Aug 17, 2010
Service Brakes, Hydraulic
100% BRAKE FAILURE ON 2002 CHEVROLET 2500 HD. PEDAL WENT COMPLETELY TO THE FLOOR WHILE DRIVING UNEXPECTEDLY. I MANAGED TO PULL OFF THE MAIN HIGHWAY ONTO A SIDE ROAD AND STOPPED WITH THE EMERGENCY BRAKE. DEALER INDICATED BRAKE LINES WERE RUSTED THROUGH AND IS IN PROCESS OF REPLACING. VEHICLE WAS PURCHASED NEW WITH ONLY 63000 MILE…
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100% BRAKE FAILURE ON 2002 CHEVROLET 2500 HD. PEDAL WENT COMPLETELY TO THE FLOOR WHILE DRIVING UNEXPECTEDLY. I MANAGED TO PULL OFF THE MAIN HIGHWAY ONTO A SIDE ROAD AND STOPPED WITH THE EMERGENCY BRAKE. DEALER INDICATED BRAKE LINES WERE RUSTED THROUGH AND IS IN PROCESS OF REPLACING. VEHICLE WAS PURCHASED NEW WITH ONLY 63000 MILES. *TR
NHTSA ODI #10350187
40,000 miles · Jul 29, 2010
EquipmentService Brakes, Hydraulic
BRAKE LINES DEVELOPED A LEAK DUE TO EXCESSIVE CORROSION. ALL LINES FROM THE BRAKE MASTER CYLINDER TO EACH WHEEL AND TO THE ABS UNIT HAD TO BE REPLACED, INCLUDING THE FLEXIBLE LINES. THE PROBLEM WAS FOUND AFTER NOTICING BRAKE FLUID DRIPPING FROM UNDER THE VEHICLE AND THE LOSS OF FLUID IN THE BRAKE FLUID RESERVOIR. *TR
NHTSA ODI #10346031
NHTSA investigations
4EA07013 · 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.
EA04012 · Hydraulic Pump Failres
Opened Apr 30, 2004 · Closed Feb 28, 2005
Status: closed (inferred from source dates) · Service Brakes, Hydraulic:power Assist; Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Additional source detail variants (2)
Service Brakes, Hydraulic:power Assist
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
Steering:hydraulic Power Assist System
GM IS CONDUCTING A RECALL ON ALL SUBJECT VEHICLES BUILD BETWEEN MAY 1999 AND OCTOBER 14, 1999.SIGNIFICANT CHANGES WERE INCORPORATED INTO PRODUCTION IN EARLY OCTOBER 1999, AND VEHICLES BUILT AFTER THAT DATE HAVE LOWER WARRANTY FAILURE RATES.THE COMPLAINT AND WARRANTY DATA APPEAR TO SUPPORT THE EFFECTIVENESS OF THESE CHANGES. GM MADE ADDITIONAL CHANGES IN NOVEMBER 1999, FEBRUARY 2000, MAY 2001, AND FEBRUARY 2004.ODI WILL CONTINUE TO MONITOR THIS PROBLEM AND WILL TAKE FURTHER ACTION, IF WARRANTED, IN THE FUTURE.FOR FURTHER TECHNICAL DETAILS SEE THE ATTACHED ENGINEERING ANALYSIS REPORT.
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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