NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
53 reportsClear category filter299,001 miles · Mar 2, 2011
Service Brakes, Hydraulic
WHILE DRIVING MY SILVERADO APPROACHING A STOP SIGN AT 25 MPH, THE BRAKES FAILED WITHOUT WARNING, A CAR IN FRONT OF ME ALREADY STOPPED THERE! I HAD SWERVE AROUND BY GOING ON THE SIDEWALK AND USE THE EMERGENCY BRAKE TO STOP, THANK GOD I DIDN'T HIT THAT CAR OR ANY PEDESTRIANS. I NOTICED BRAKE FLUID DRIPPING FROM FRAME ABOVE LEFT …
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WHILE DRIVING MY SILVERADO APPROACHING A STOP SIGN AT 25 MPH, THE BRAKES FAILED WITHOUT WARNING, A CAR IN FRONT OF ME ALREADY STOPPED THERE! I HAD SWERVE AROUND BY GOING ON THE SIDEWALK AND USE THE EMERGENCY BRAKE TO STOP, THANK GOD I DIDN'T HIT THAT CAR OR ANY PEDESTRIANS. I NOTICED BRAKE FLUID DRIPPING FROM FRAME ABOVE LEFT REAR WHEEL & REAR AXEL. I HAD THE SILVERADO TOWED TO THE GM SERVICE CENTER TO INSPECT THE BRAKE LINES; $99.00 PLUS TAX GM SERVICE CENTER SAID BRAKE LINES WHERE RUSTED THROUGH AND WOULD BE $1,012.98 PLUS TAX! TO REPAIR LEAKING LINES. I BELIEVE THIS IFAILURE IS DUE TO GM NOT UTILIZING STAINLESS STEEL BRAKE LINES. *TR
NHTSA ODI #10386203
162,000 miles · Jan 30, 2011
Service Brakes, Hydraulic
BRAKE SYSTEM FAILURE DUE TO BRAKE LINE CORROSION. THIRD TIME THIS HAS HAPPENED. FIRST TWO INSTANCES WERE ON THE REAR LINES DUE TO EXPOSURE TO SALT SPRAY. RECENT OCCURRENCE WAS LOCATED AT THE RETAINMENT CLIP HOLDING THE TWO LINES RUNNING DOWNSTREAM OF THE MASTER CYLINDER TO THE FRAME RAIL. BOTH LINES RUSTED THROUGH AND BEGAN …
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BRAKE SYSTEM FAILURE DUE TO BRAKE LINE CORROSION. THIRD TIME THIS HAS HAPPENED. FIRST TWO INSTANCES WERE ON THE REAR LINES DUE TO EXPOSURE TO SALT SPRAY. RECENT OCCURRENCE WAS LOCATED AT THE RETAINMENT CLIP HOLDING THE TWO LINES RUNNING DOWNSTREAM OF THE MASTER CYLINDER TO THE FRAME RAIL. BOTH LINES RUSTED THROUGH AND BEGAN LEAKING. LINES STARTED LEAKING WHEN BRAKES WERE APPLIED IN ICY CONDITIONS. ABS SYSTEM ENGAGED AND THE ADDED PRESSURE LEAD TO LINE FAILURE. VEHICLE CONTINUED INTO INTERSECTION DUE TO REDUCED BRAKE FUNCTION. FORTUNATELY DID NOT RESULT IN A CRASH. *TR
NHTSA ODI #10379594
119,400 miles · Jan 3, 2011
Service Brakes, Hydraulic
BRAKE LINE FAILURE, LEFT SIDE BEHIND WHEEL WHERE LINES RUN ON TOP OF FRAME. WHILE IN THE DRIVE THRU LANE AT FAST FOOD RESTRAINT. NEARLY PINNED PEDESTRIAN BETWEEN MY TRUCK AND THE VEHICLE IN FRONT OF ME. *TR
NHTSA ODI #10373914
182,000 miles · Dec 9, 2010
Service Brakes, Hydraulic
BRAKE LINE LEAKING FLUID. WIFE STEPPED ON BRAKES AND ROLLED THROUGH INTERSECTION OF HIGHWAY K AND HIGHWAY N IN ST. CHARLES, MO. THE LINE THAT FAILED IS IN THE BUNDLE ALONG THE FRAME UNDER THE DRIVERS SEAT. ALL THE LINES SHOW SIGNS OF RUST. I UNDERSTAND THIS IS NOT THE FIRST OCCURRENCE. JUST GLAD SHE DID NOT HIT ANYONE OR GET…
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BRAKE LINE LEAKING FLUID. WIFE STEPPED ON BRAKES AND ROLLED THROUGH INTERSECTION OF HIGHWAY K AND HIGHWAY N IN ST. CHARLES, MO. THE LINE THAT FAILED IS IN THE BUNDLE ALONG THE FRAME UNDER THE DRIVERS SEAT. ALL THE LINES SHOW SIGNS OF RUST. I UNDERSTAND THIS IS NOT THE FIRST OCCURRENCE. JUST GLAD SHE DID NOT HIT ANYONE OR GET INJURED. HOPE YOU QUIT DRAGGING YOUR FEET ON THIS ISSUE AND MAKE THE CAR COMPANY THAT THE USA IS INVESTED IN FIX THEIR BRAKE PROBLEM. *TR
NHTSA ODI #10369847
80,000 miles · Oct 1, 2010
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. WHILE PARKING THE VEHICLE THE ELECTRONIC BRAKING SYSTEM FAILED. AS HE DEPRESSED THE BRAKE PEDAL TO STOP THE VEHICLE THEY FAILED TO ENGAGE. HE HAD TO CONTINUALLY PRESS THE BRAKES WITH EXCESSIVE FORCE. THE DEALER AND THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS …
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. WHILE PARKING THE VEHICLE THE ELECTRONIC BRAKING SYSTEM FAILED. AS HE DEPRESSED THE BRAKE PEDAL TO STOP THE VEHICLE THEY FAILED TO ENGAGE. HE HAD TO CONTINUALLY PRESS THE BRAKES WITH EXCESSIVE FORCE. THE DEALER AND THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 80,000.
NHTSA ODI #10358730
100,000 miles · Sep 1, 2010
Service Brakes, Hydraulic
THE BRAKE LINES FAILED ON MY 2000 CHEVY SILVERADO 2500. THE VEHICLE WAS BACKING DOWN A BOAT LAUNCH RAMP AT THE TIME AND WAS STOPPED WITH THE PARKING BRAKE. THE TRUCK HAD TO BE TOWED AND ALL OF THE METAL BRAKE LINES REPLACED (THE BRAKE LINES HAD TO BE MADE BECAUSE GM DOES NOT SELL REPLACEMENT LINE). *TR
NHTSA ODI #10353276
45,454 miles · Jul 31, 2010
Service Brakes, Hydraulic
FOR THE TIME IN 4 MONTHS, MY 2000 CHEVROLET K2500HD FULL SIZED PICKUP TRUCK HAS EXPERIENCED BRAKE FAILURE DUE TO RUST-THROUGH OF A BRAKE LINE. THE FIRST FAILURE POINT WAS LOCATED NEAR THE RIGHT FRONT WHEEL IN THE VICINITY OF THE METAL LINE TO RUBBER HOSE CONNECTION, IN THE EXACT LOCATION WHERE THE METAL LINE RUNS BETWEEN THE FRA…
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FOR THE TIME IN 4 MONTHS, MY 2000 CHEVROLET K2500HD FULL SIZED PICKUP TRUCK HAS EXPERIENCED BRAKE FAILURE DUE TO RUST-THROUGH OF A BRAKE LINE. THE FIRST FAILURE POINT WAS LOCATED NEAR THE RIGHT FRONT WHEEL IN THE VICINITY OF THE METAL LINE TO RUBBER HOSE CONNECTION, IN THE EXACT LOCATION WHERE THE METAL LINE RUNS BETWEEN THE FRAME AND THE ELECTRICAL CONNECTOR FOR THE ANTILOCK SYSTEM'S WIRING TO THE RIGHT-FRONT WHEEL SENSOR. TODAY'S FAILURE IS LOCATED IN THE ENGINE COMPARTMENT DIRECTLY UNDER THE MASTER CYLINDER. THE ACTUAL LEAK IS IN A SECTION OF LINE THAT IS NOT OBSCURED BY ANY MOUNTING POINTS. IT IS OUT IN THE OPEN AND FULLY VISIBLE WHEN LOOKING INTO THE ENGINE COMPARTMENT WHILE STANDING IN FRONT OF THE VEHICLE. SEVERAL OTHER SECTIONS OF BRAKE LINE APPEAR HAVE MAJOR RUST ISSUES ALSO. THIS TRUCK HAS 45,454 MILES ON IT. THE ORIGINAL BRAKE MASTER CYLINDER FAILED AT 26,XXX MILES. THE VEHICLE'S WARRANTY HAD EXPIRED, SO I WAS RESPONSIBLE FOR THIS REPAIR. I HAVE NOTICED THE BRAKE FLUID IN THE RESERVOIR OF THIS VEHICLE HAS A HISTORY OF TURNING TO A DARK COLOR WITHIN A SHORT PERIOD AFTER A BRAKE FLUID FLUSH, EVEN AFTER THE REPLACEMENT MASTER CYLINDER WAS INSTALLED. I HAVE NEVER BEEN SATISFIED WITH THE STOPPING POWER OF THE BRAKES ON THIS TRUCK. I AM THE ORIGINAL OWNER, AND SINCE THE TRUCK WAS NEW I ALWAYS FELT THE BRAKES HAD A VERY "SPONGY" FEEL. EVEN WHEN NEW THERE WERE A FEW OCCASIONS WHEN I EXPERIENCED 'AM I GOING TO BE ABLE TO STOP' SCARES. I MUST NOW HAVE THE TRUCK TOWED TO A REPAIR FACILITY, TO HAVE THE ENTIRE SYSTEM OF BRAKE LINES INSPECTED AND REPLACED AS NECESSARY. OBVIOUSLY THE TRUCK IS NOT SAFE TO DRIVE UNTIL THIS IS DONE. *TR
NHTSA ODI #10346500
125,000 miles · Jul 6, 2010
Service Brakes, Hydraulic
FAILURE OF STEEL BRAKE LINES RESULTING IN LOSS OF BRAKING ON 2000 SILVERADO 2500 4X4 PICKUP TRUCK. *TR
NHTSA ODI #10341605
46,800 miles · Jun 15, 2010
Service Brakes, Hydraulic
2000 CHEVROLET 2500 PICK UP TRUCK - THIRD OCCURRENCE OF SIGNIFICANTLY REDUCED BRAKING ABILITY DUE TO CORROSION OF BRAKE LINES. PRIOR OCCURRENCES OF BRAKE LINE CORROSION LEADING TO SIGNIFICANTLY REDUCED BRAKING ABILITY OCCURRED IN OCT 2007 AND AUG, 2009 (SAME PROBLEM - DIFFERENT BRAKE LINE SECTIONS). *TR
NHTSA ODI #10336435
78,610 miles · May 24, 2010
Service Brakes, Hydraulic
BRAKE FAILURE DUE TOO RUSTED THROUGH (DEFECTIVE LINES) STEEL LINES LEAKING BRAKE FLUID CAUSING LOSS OF PRESSURE TO APPLY BRAKES AS DESIGNED; ON UNDER SIDE OF VEHICLE FLUID US SPRAYED WITHOUT WARNING. OCCURRED WHILE ON DOWNSIDE OF MOUNTAIN WITH LIGHT PRESSURE ON PEDAL. *TR
NHTSA ODI #10331937
NHTSA investigations
2EA04012 · 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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