NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
53 reportsClear category filter140,000 miles · Jun 13, 2012
Service BrakesService Brakes, Hydraulic
MY BRAKES FAILED WITHOUT WARNING IN A PARKING LOT. CAREFULLY, I MADE IT HOME WITH NO BRAKES AND FOUND THE BRAKE LINES WERE ALL CORRODED AND LEAKED BRAKE FLUID. BRAKE LINES ARE SUPPOSED TO BE MADE FROM NON-CORROSIVE MATERIAL. FIXING BRAKES ON THIS MODEL PICKUP IS A MASSIVE UNDERTAKING. ONE BRAKE LINE IS LOCATED UNDER THE BED …
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MY BRAKES FAILED WITHOUT WARNING IN A PARKING LOT. CAREFULLY, I MADE IT HOME WITH NO BRAKES AND FOUND THE BRAKE LINES WERE ALL CORRODED AND LEAKED BRAKE FLUID. BRAKE LINES ARE SUPPOSED TO BE MADE FROM NON-CORROSIVE MATERIAL. FIXING BRAKES ON THIS MODEL PICKUP IS A MASSIVE UNDERTAKING. ONE BRAKE LINE IS LOCATED UNDER THE BED OF THE TRUCK. *TR WHEN THE CONSUMER EXAMINED THE BRAKES ON THE VEHICLE, HE WAS SHOCKED TO SEE THE EXTENT OF CORROSION ON THE MEAL BRAKE LINE. HE WAS ALSO SHOCKED TO FIND THAT FOR ONE OF THE BRAKE LINES, HE HAD TO REMOVE THE TRUCK BED, IN ORDER TO SEE IT. THE FIRST RUPTURE OCCURRED ON THE LINE RUNNING FROM THE METERING OR PROPORTIONAL VALVE TO THE REAR BRAKES. THERE WAS NO WAY HE COULD SEE THAT AREA. THE SECOND FAILURE OCCURRED DURING BLEEDING AND TESTING OF THE FIRST REPAIR. THE THIRD LEAK APPEARED BY THE MOVEMENT OF THE LINE DURING THE SECOND REPAIR. ALL WERE DUE TO CORROSION IN WHAT SHOULD HAVE BEEN NON-CORROSIVE MATERIAL. THE CONSUMER STATED THE LOCATION OF THE BRAKE LINES AND THE MATERIALS USED WERE TOTALLY UNACCEPTABLE AND HE IS SEEKING REIMBURSEMENT FOR PARTS AND LABOR. UPDATED 06/29/12. *JB
NHTSA ODI #10461501
142,000 miles · Feb 23, 2012
Power TrainService Brakes, Hydraulic
JUST BACKED INTO THE ST. CLAIR RIVER TO RETRIEVE SMALL BOAT. LOADED BOAT. AS I PUT MY FOOT DOWN ON BRAKE PEDAL TO MOVE TRANSMISSION TO DRIVE, BRAKE PEDAL WENT TO FLOOR, GOT THE TRANS TO NEUTRAL, BUT NOT TO DRIVE. THE TRUCK AND BOAT STARTED TO ROLL INTO RIVER. PANIC SITUATION... JAMBED TRANS INTO DRIVE, AND WAS ABLE TO GET…
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JUST BACKED INTO THE ST. CLAIR RIVER TO RETRIEVE SMALL BOAT. LOADED BOAT. AS I PUT MY FOOT DOWN ON BRAKE PEDAL TO MOVE TRANSMISSION TO DRIVE, BRAKE PEDAL WENT TO FLOOR, GOT THE TRANS TO NEUTRAL, BUT NOT TO DRIVE. THE TRUCK AND BOAT STARTED TO ROLL INTO RIVER. PANIC SITUATION... JAMBED TRANS INTO DRIVE, AND WAS ABLE TO GET TRUCK OUT OF RIVER, WITH WATER LINE HALF WAY UP DRIVERS DOOR. ONCE HOME DISCOVERED BADLY RUSTED BRAKE LINE ABOVE FUEL TANK RUPTURED. REPAIRED... TWO MONTHS LATER, WHILE WIFE WAS DRIVING TRUCK TO WORK, BRAKE LINE BETWEEN MASTER CYLINDER AND ABS MODUAL FAILED. HAD ENOUGH! REPLACED ALL BRAKE LINES ON TRUCK EXCEPT THE ONE OVER REAR AXEL. I STILL WILLD O THAT ONE ALSO. ABS/BRAKE LIGHTS ON DASH ARE STILL ILLUMINATED. STILL TRYING TO FIGURE OUT THAT ISSUE.. MANY DISCUSSIONS WITH OTHER SILVERADO OWNERS, AND AUTOPARTS EMPLOYEES. THIS SEEMS TO BE A VERY COMMON ISSUE, WITH VERY DANGAROUS POTENTIAL FOR INJURYS.. *TR
NHTSA ODI #10449068
148,905 miles · Jan 24, 2012
Service Brakes, HydraulicCrash
ON 11/23/2011 AT 6:45 AM EST, I WAS HEADED DOWN A SNOW COVERED ROAD WHEN I NOTICED A PLOW TRUCK COMING TOWARDS ME AT A HIGH RATE OF SPEED. I THEN HIT THE BRAKES AT NORMAL PRESSURE AND THE PEDAL WENT TO THE FLOOR WITH NEXT TO NO RESISTANCE, HAVING NO BRAKES I DOWNSHIFTED THE AUTOMATIC TRANSMISSION SLOWING ME BUT NOT FAST ENOUGH, …
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ON 11/23/2011 AT 6:45 AM EST, I WAS HEADED DOWN A SNOW COVERED ROAD WHEN I NOTICED A PLOW TRUCK COMING TOWARDS ME AT A HIGH RATE OF SPEED. I THEN HIT THE BRAKES AT NORMAL PRESSURE AND THE PEDAL WENT TO THE FLOOR WITH NEXT TO NO RESISTANCE, HAVING NO BRAKES I DOWNSHIFTED THE AUTOMATIC TRANSMISSION SLOWING ME BUT NOT FAST ENOUGH, I COLLIDED WITH A FIRE HYDRANT AT THE TOP OF A STEEP EMBANKMENT ON THE SIDE OF THE AT APPROXIMATELY 35MPH AND KNOCKED THE FIRE HYDRANT OUT OF THE GROUND. HAD THE FIRE HYDRANT NOT BEEN THERE, I COULD'VE FELL MORE THAN 50 FEET DOWN TO MY DEMISE. LUCKILY, THE HYDRANT WAS SHUT OFF AND THE ONLY DAMAGE (BECAUSE THE PLOW FRAME ABSORBED MOST OF THE IMPACT) WAS THE FRONT BUMPER. I HAVE HAD TO PAY $75 JUST TO HAVE THE LINE PATCHED GOOD ENOUGH FOR THE TRUCK TO BE DRIVABLE, WITH IMMINENT FAILURE OF THE REAR BRAKE LINES ACROSS THE REAR AXLE AND THE FRONT BRAKE LINES TO THE FRONT BRAKE CALIPERS. I HAVE HAD THIS PROBLEM WITH BOTH MY CHEVROLET SILVERADO 2500 (MODEL YEAR 2000) AND MY CHEVROLET SILVERADO 1500 (MODEL YEAR 1999). *TR
NHTSA ODI #10445136
100,000 miles · Jan 4, 2012
Service Brakes, Hydraulic
HARD BRAKE LINE FAILURE ON DRIVER'S SIDE. SOFT PEDAL AND INCREASED STOPPING DISTANCE. EXORBITANT CORROSION OF LINES. ALL METAL LINES NEED REPLACEMENT ON INSPECTION. ALSO EXCESSIVE RUSTING OF ENTIRE UNDERSIDE OF VEHICLE. *TR
NHTSA ODI #10442386
90,212 miles · Dec 14, 2011
Service Brakes, Hydraulic
THE BRAKE LINES HAVE CORRODED AND LEAKED FLUID OUT AND IT CAUSED COMPLETE FAILURE OF BRAKING SYSTEM. THERE WERE NO SYMPTOMS GIVING WARNING TO THIS FAILURE. *TR
NHTSA ODI #10439906
Mileage unknown · Nov 8, 2011
Service Brakes, Hydraulic
BRAKES FAILED DUE TO LOSS OF BRAKE FLUID THROUGH BROKEN RUSTED THROUGH STEEL BRAKE LINES. UPON FURTHER INSPECTION ALL BRAKE LINES ARE IN SIMILAR CONDITION. *TR
NHTSA ODI #10434930
175,000 miles · Oct 16, 2011
Service Brakes, Hydraulic
THE MAIN BRAKE LINE FROM THE MASTER CYLINDER TO THE ANTILOCK UNIT RUSTED THROUGH AND LEAKED CAUSING THE BRAKES TO FAIL. *TR
NHTSA ODI #10430423
26,500 miles · Aug 2, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. THE CONTACT STATED THAT WHILE DRIVING AT LOW SPEEDS AND DEPRESSING THE BRAKES, THE PEDAL WOULD GO STRAIGHT TO THE FLOOR. THE VEHICLE WAS TAKEN TO A DEALER AND THEY ADVISED HER THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS…
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TL* THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. THE CONTACT STATED THAT WHILE DRIVING AT LOW SPEEDS AND DEPRESSING THE BRAKES, THE PEDAL WOULD GO STRAIGHT TO THE FLOOR. THE VEHICLE WAS TAKEN TO A DEALER AND THEY ADVISED HER THAT THEY WERE UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 26,500. THE VIN WAS UNAVAILABLE. UPDATED 2/21/12 *CN
NHTSA ODI #10416660
51,000 miles · Mar 27, 2011
Service Brakes, Hydraulic
ALL OF THE BRAKE LINES IN MY 2000 CHEVY SILVERADO ARE COMPLETELY RUSTED OUT. I HAVE HAD THE BRAKES STOP WORKING AFTER A BRAKE LINE RUPTURED WITH NO WARNING ON TWO DIFFERENT OCCASIONS. *TR
NHTSA ODI #10393015
105,597 miles · Mar 9, 2011
Service Brakes, Hydraulic
I WAS DRIVING MY 2000 CHEVROLET SILVERADO 2500 PICKUP AND PULLING AN EMPTY 16\' CARGO TRAILER, AND STARTED TO DECEND A 8% GRADE HILL. I HAD THE TRANS IN TOW MODE AND STARTED APPLYING THE BRAKES TO SLOW FROM APPROX 50 MPH, AS I WAS GOING TO TURN AT THE BOTTOM OF THE HILL. THE BRAKES FIRST HELD AND THEN AS I HELD BRAKE PEDAL PRESS…
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I WAS DRIVING MY 2000 CHEVROLET SILVERADO 2500 PICKUP AND PULLING AN EMPTY 16\' CARGO TRAILER, AND STARTED TO DECEND A 8% GRADE HILL. I HAD THE TRANS IN TOW MODE AND STARTED APPLYING THE BRAKES TO SLOW FROM APPROX 50 MPH, AS I WAS GOING TO TURN AT THE BOTTOM OF THE HILL. THE BRAKES FIRST HELD AND THEN AS I HELD BRAKE PEDAL PRESSURE CONSTANT THE PEDAL WENT TO THE FLOOR. I QUICKLY REALIZED I WAS IN TROUBLE AND PULLED THE TRANS TO 3 AND THEN 2. THANK GOD THERE WAS NO ONE IN FRONT OF ME MAKING THE SAME LEFT TURN AS I, AS THERE WAS A STEEP TREE LINED HILL TO MY RIGHT AND IT WOULD HAVE BEEN CATASTROPHIC AT THAT POINT. I STEPPED ON THE EMERGENCY BRAKE AND GOT THE TRUCK STOPPED BUT MISSED MY TURN BY APPROX. 100 FEET. I RECOVERED MY COMPOSURE AND AFTER A FEW MINUTES STOPPED SHAKING ENOUGH TO LIMP MY TRUCK HOME USING THE EMERGENCY BRAKE AND 2ND GEAR. I WAS APPROX. 2 MILES FROM MY HOME ON A COUNTRY BLACKTOP ROAD. WHEN CHECKING OUT THE TRUCK BRAKE LINES FOUND THEM TO BE EXTREMELY RUSTY AND IN ONE PLACE SPLIT. I REPLACED THAT LINE ONLY TO FAIL A 2ND LINE WHILE BLEEDING THE BRAKES IN MY DRIVEWAY. AFTER REPLACING THE 2 LINES FROM THE MASTER CYLINDER TO THE ABS MODULE AND THE 2 LINES FROM THE MODULE TO THE FRONT WHEEL CYLINDERS, I AGAIN VENTURED OUT ONLY TO AGAIN LOSE MY BRAKES ON THE DOWNGRADE OF MY DRIVEWAY AGAIN, WHICH WAS THE LAST STRAW, AND I REPLACE ALL THE REMAINING LINES. PEDAL IS STILL MUSHY BUT THE BRAKES ARE HOLDING AND NOT LEAKING FLUID. I AM THE 2ND OWNER OF THE TRUCK AND PUT MAYBE 3,000 MILES A YEAR ON THE TRUCK. I ALSO OWN A 1997 AUTOMOBILE WHICH HAS OVER 300,000 MILES AND NEVER HAD A BRAKE PROBLEM AND THE BRAKE LINES SHOW VERY LITTLE RUST, AND I DRIVE THIS VEHICLE ALL WINTER WHILE I MIGHT USE THE TRUCK A HALF DOZEN TIMES DURING ADVERSE CONDITIONS. I BELIEVE GM IS AT FAULT HERE BY PUTTING CHEAP STEEL BRAKE LINES ON THEIR TRUCKS, PROBABLY AS A COST REDUCTION SINCE THEY
NHTSA ODI #10389588
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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