NHTSA owner reports · September 18, 2026 snapshot.
Service Brakes, Hydraulic complaints
53 reportsClear category filter123,235 miles · Oct 14, 2009
Service Brakes, Hydraulic
PURCHASED A USED 200 CHEVROLET SILVERADO K2500 4WD. THE ANTI LOCK BRAKES ACTIVATE AT 7MPH WHILE STOPPING. IT OCCURS AT EVERY STOP. THE DEALER REPLACED THE SPEED SENSORS PER THE RECALL WHICH DID NOT SOLVE THE PROBLEM. THE DEALER TESTED THE VEHICLE AFTER THE FIX AND FOUND IT STILL FAILING. NOW GM WON'T DO ANYTHING MORE AND MY TRUC…
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PURCHASED A USED 200 CHEVROLET SILVERADO K2500 4WD. THE ANTI LOCK BRAKES ACTIVATE AT 7MPH WHILE STOPPING. IT OCCURS AT EVERY STOP. THE DEALER REPLACED THE SPEED SENSORS PER THE RECALL WHICH DID NOT SOLVE THE PROBLEM. THE DEALER TESTED THE VEHICLE AFTER THE FIX AND FOUND IT STILL FAILING. NOW GM WON'T DO ANYTHING MORE AND MY TRUCK STILL HAS FAULTY ANTI LOCK BRAKES. *TR
NHTSA ODI #10287315
77,009 miles · Mar 19, 2009
Service Brakes, Hydraulic
DRIVING SILVERADO, DEPRESSED BRAKE AND BRAKES FAILED. I WAS TRAVELING SLOWLY SO LUCKILY THERE I DIDN'T STRIKE ANYONE. I IMMEDIATELY STOPPED, AND NOTICED THAT THERE WAS FLUID DRIPPING FROM UNDER THE DRIVER SIDE PASSENGER COMPARTMENT. I TOOK THE SILVERADO IMMEDIATELY TO THE GM DEALER AND WAS TOLD MY BRAKE LINES WHERE RUSTED, A…
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DRIVING SILVERADO, DEPRESSED BRAKE AND BRAKES FAILED. I WAS TRAVELING SLOWLY SO LUCKILY THERE I DIDN'T STRIKE ANYONE. I IMMEDIATELY STOPPED, AND NOTICED THAT THERE WAS FLUID DRIPPING FROM UNDER THE DRIVER SIDE PASSENGER COMPARTMENT. I TOOK THE SILVERADO IMMEDIATELY TO THE GM DEALER AND WAS TOLD MY BRAKE LINES WHERE RUSTED, AND ONE WAS RUSTED THROUGH. I HAVE NEVER OWNED A VEHICLE THAT HAD RUSTED LINES. THIS IS A FAILURE DUE TO COST CUTTING MEASURES BY GM. USING A BARE STEEL TUBE THAT IS SUSCEPTIBLE TO RUSTING IS TOTAL IRRESPONSIBLE. SUCH AN IMPORTANT PART SHOULD NOT BE DESIGNED TO FAIL. *TR
NHTSA ODI #10262495
115,000 miles · Dec 18, 2008
Service Brakes, Hydraulic
WE ARE EXPERIENCING UNWANTED ABS ACTIVATION AT LOW SPEEDS GIVING US NO BRAKING WHEN ACTIVATED. THIS VEHICLE HAS BEEN SERVICED ON !0/28/05 FOR ABS RECALL #05068 AT 75,484 MILES THIS PROBLEM IS RE OCCURRING FOR THE LAST 18MONTHS. THE VEHICLE NOW HAS 115,000 MILES. I,VE NOTICED A NEW RECALL OUT #05V379000 FOR THIS ISSUE. THIS BRAKI…
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WE ARE EXPERIENCING UNWANTED ABS ACTIVATION AT LOW SPEEDS GIVING US NO BRAKING WHEN ACTIVATED. THIS VEHICLE HAS BEEN SERVICED ON !0/28/05 FOR ABS RECALL #05068 AT 75,484 MILES THIS PROBLEM IS RE OCCURRING FOR THE LAST 18MONTHS. THE VEHICLE NOW HAS 115,000 MILES. I,VE NOTICED A NEW RECALL OUT #05V379000 FOR THIS ISSUE. THIS BRAKING ISSUE WAS ONCE IN A WHILE NOW TO BE EVERY DAY AND ALMOST EVERY COMPLETE STOP. COULD THE MANUFACTURER BE REQUIRED TO FIX THIS ISSUE AGAIN AT NO COST TO US? IT DOES APPEAR TO US THAT GM FIXED THE ISSUE THE FIRST TIME BUT NOT THE PROBLEM,THAT CAUSED THE ISSUE.*TR
NHTSA ODI #10252201
67,000 miles · Oct 29, 2008
Service Brakes, Hydraulic
TOTAL BRAKE FAILURE, FORTUNATELY AT SLOW SPEED WHERE PARKING BRAKE COULD BE USED TO STOP. IT WAS IMMEDIATELY AFTER EXITING A HIGH-SPEED INTERSTATE, HOWEVER, WHERE THE FAILURE COULD WELL HAVE RESULTED IN A SERIOUS CRASH. THE VEHICLE, A 2000 CHEVROLET 3/4 TON SILVERADO HD TRUCK, WAS TAKEN TO A NEARBY CHEVROLET DEALER, WHERE IT W…
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TOTAL BRAKE FAILURE, FORTUNATELY AT SLOW SPEED WHERE PARKING BRAKE COULD BE USED TO STOP. IT WAS IMMEDIATELY AFTER EXITING A HIGH-SPEED INTERSTATE, HOWEVER, WHERE THE FAILURE COULD WELL HAVE RESULTED IN A SERIOUS CRASH. THE VEHICLE, A 2000 CHEVROLET 3/4 TON SILVERADO HD TRUCK, WAS TAKEN TO A NEARBY CHEVROLET DEALER, WHERE IT WAS DETERMINED THAT RUST HAD CAUSED TWO LEAKS IN THE BRAKE LINES, CAUSING IMMEDIATE FAILURE OF ALL FOUR WHEEL BRAKES. AN ESTIMATE OF UP TO $7000 FOR REPAIR WAS GIVEN. *TR
NHTSA ODI #10247190
45,200 miles · Sep 2, 2008
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING LESS THAN 8 MPH WITH THE BRAKE PEDAL DEPRESSED, THE ABS WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE MOVED ANOTHER 10-15 FEET BEFORE COMING TO A COMPLETE STOP. THE FAILURE OCCURRED EACH TIME THE CONTACT ATTEMPTED TO STOP THE VEHICLE. THER…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING LESS THAN 8 MPH WITH THE BRAKE PEDAL DEPRESSED, THE ABS WARNING LIGHT ILLUMINATED ON THE INSTRUMENT PANEL. THE VEHICLE MOVED ANOTHER 10-15 FEET BEFORE COMING TO A COMPLETE STOP. THE FAILURE OCCURRED EACH TIME THE CONTACT ATTEMPTED TO STOP THE VEHICLE. THERE WERE NO RECALLS LISTED FOR THE VEHICLE AND GENERAL MOTORS WOULD NOT ASSIST IN REMEDYING THE FAILURE. THE FAILURE MILEAGE WAS 45,200 AND CURRENT MILEAGE WAS 45,900. UPDATED 10-07-08 *BF THE ABS ENGAGED PREMATURELY. UPDATED 10/15/08. *JB
NHTSA ODI #10240615
60,000 miles · Jan 25, 2008
Service Brakes, Hydraulic
MY 2000 CHEVROLET K2500 SILVERADO HAS 60,000 MILES. THE REAR BRAKES DO NOT FUNCTION AS DESIGNED. THE INTERIOR BRAKE PAD, ON THE DISC BREAKS, ONLY COME IN CONTACT WITH THE ROTOR FOR 1/2 OF AN INCH OR LESS. I COULDN'T FIGURE OUT WHY MY ANTI-LOCK BRAKES ENGAGED ALL THE TIME AND I THINK IT IS BECAUSE AN UNDUE AMOUNT OF BRAKING PRESS…
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MY 2000 CHEVROLET K2500 SILVERADO HAS 60,000 MILES. THE REAR BRAKES DO NOT FUNCTION AS DESIGNED. THE INTERIOR BRAKE PAD, ON THE DISC BREAKS, ONLY COME IN CONTACT WITH THE ROTOR FOR 1/2 OF AN INCH OR LESS. I COULDN'T FIGURE OUT WHY MY ANTI-LOCK BRAKES ENGAGED ALL THE TIME AND I THINK IT IS BECAUSE AN UNDUE AMOUNT OF BRAKING PRESSURE IS PLACED ON THE FRONT DISC BRAKES AS THE REAR BRAKES ARE CLEARLY NOT ENGAGING PROPERLY. I HAD MIDAS REVIEW THE BRAKES AND THEY CLAIM THIS IS COMMON. THE ROTORS HAVE TO BE REPLACED BECAUSE ALL THEY DO IS RUST SINCE THE BRAKE PAD HARDLY TOUCHES THE ROTOR. I CALLED MY DEALERSHIP WHO ALSO SAID THIS IS COMMON. HAVE THERE BEEN ANY INVESTIGATIONS INTO CHEVY TRUCK ACCIDENTS AND HOW THE BRAKES FUNCTION? DO CHEVY TRUCK OWNERS EVEN REALIZE THEIR 5,000-6,000 POUND TRUCKS, OFTEN USED FOR TOWING, ARE NOT STOPPING AS THEY WERE DESIGNED TO STOP? WHY HASN'T THERE BEEN A RECALL? WHO CAN I HAVE INSPECT MY BRAKES TO CONFIRM THIS COMMON BRAKE DEFECT BEFORE I HAVE THEM REPLACED? *TR
NHTSA ODI #10216018
125,441 miles · Sep 14, 2007
Parking BrakeService Brakes, Hydraulic
IN MAY (2007) I WENT TO NEW YORK AND DROVE MY SON'S 2000 Z71 SILVERADO BACK TO TEXAS WHEN HE WAS SENT TO IRAQ. THERE WERE NO PROBLEMS NOTICED ON THE TRIP, BUT AFTER THE TRUCK HAD BEEN PARKED FOR APPROX 3 WEEKS IN MY DRIVEWAY, IT WOULD NOT MOVE WHEN I TRIED TO MOVE IT ACROSS MY DRIVEWAY WHILE I WAS EDGING. IT FELT LIKE THERE W…
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IN MAY (2007) I WENT TO NEW YORK AND DROVE MY SON'S 2000 Z71 SILVERADO BACK TO TEXAS WHEN HE WAS SENT TO IRAQ. THERE WERE NO PROBLEMS NOTICED ON THE TRIP, BUT AFTER THE TRUCK HAD BEEN PARKED FOR APPROX 3 WEEKS IN MY DRIVEWAY, IT WOULD NOT MOVE WHEN I TRIED TO MOVE IT ACROSS MY DRIVEWAY WHILE I WAS EDGING. IT FELT LIKE THERE WAS SOMETHING HIGH-CENTERED UNDERNEATH IT. MY SON TAKES EXCELLENT CARE OF HIS VEHICLE AND STAYS CURRENT ON ALL MAINTENANCE, ALWAYS. AND, HE HAD JUST HAD NEW REAR BRAKES INSTALLED BEFORE HE LEFT. I HAD TO HAVE A TOW TRUCK TAKE IT TO A SHOP AND THEY REPLACED ALL BRAKES AND EMERGENCY BRAKES BECAUSE THEY SAID THEY WERE FROZEN WITH RUST. WHEN IT WAS BEING DRIVEN EVERYDAY, THE RUST NEVER HAD A CHANCE TO OXIDIZE ENOUGH TO COMPLETELY FREEZE THE WHEELS UP, BUT AFTER SITTING FOR A WHILE IT WAS LIKE IT WAS UP ON BLOCKS. *TR
NHTSA ODI #10202970
75,580 miles · Aug 23, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. THE VEHICLE WAS BEING SERVICED FOR THE ANTI-LOCK BRAKES RECALL. ONE OF THE BRAKES, DUE TO THE OTHERS NOT BEING DEFECTIVE WAS DAMAGED. TWO YEARS LATER, THE SAME DEFECT OCCURRED ON THE REMAINING BRAKES. DURING THE PREVIOUS RECALL REPAIR, ALL OF THE BRAKES WERE NOT SERVICED DUE T…
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. THE VEHICLE WAS BEING SERVICED FOR THE ANTI-LOCK BRAKES RECALL. ONE OF THE BRAKES, DUE TO THE OTHERS NOT BEING DEFECTIVE WAS DAMAGED. TWO YEARS LATER, THE SAME DEFECT OCCURRED ON THE REMAINING BRAKES. DURING THE PREVIOUS RECALL REPAIR, ALL OF THE BRAKES WERE NOT SERVICED DUE TO THE DEALERS SPECIFICATIONS. THE DEALER STATED THAT SINCE HE HAS ALREADY USED HIS RECALL, HE IS REQUIRED TO PAY FOR THE REPAIR, ALTHOUGH THE OTHER BRAKES WERE NOT A PART OF THE ORIGINIAL RECALL. THE MANUFACTURER STATED THAT THEY WOULD DO AN INVESTIGATION TO DETERMINE IF THIS IS A CONCERN OF THEIRS. THE CONTACT DID NOT AGREE TO ANY CHARGES AS IT RELATES TO ANY RECALL. GM'S RECALL NOTICE ID: IS 05068. THE FAILURE MILEAGE WAS 75,580. THE CURRENT MILEAGE IS 95,000.
NHTSA ODI #10200607
84,159 miles · Jul 19, 2007
Service Brakes, Hydraulic
TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. ON JUNE 14, 2007, AT 84,000 MILES, THE CONTACT TOOK THE VEHICLE TO HAVE THE BRAKES SERVICED. THE MECHANIC FOUND THAT THE BACK SIDE OF THE ROTORS WERE COMPLETELY RUSTED, EXCEPT FOR A HALF INCH OF PAD. THE MECHANIC STATED THAT THIS CAUSED THE CONTACT TO LOSE ONE WHEELS WORTH …
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TL*THE CONTACT OWNS A 2000 CHEVROLET SILVERADO 2500. ON JUNE 14, 2007, AT 84,000 MILES, THE CONTACT TOOK THE VEHICLE TO HAVE THE BRAKES SERVICED. THE MECHANIC FOUND THAT THE BACK SIDE OF THE ROTORS WERE COMPLETELY RUSTED, EXCEPT FOR A HALF INCH OF PAD. THE MECHANIC STATED THAT THIS CAUSED THE CONTACT TO LOSE ONE WHEELS WORTH OF COMBINED BRAKING. ALL FOUR ROTORS HAD TO BE REPLACED, TOTALING $468.49 IN REPAIRS. THE CURRENT AND FAILURE MILEAGES WERE 84,159. UPDATED 02/01/08. *LJ
NHTSA ODI #10196857
75,000 miles · May 25, 2006
Service Brakes, Hydraulic
UNNECESSARY ANTI-LOCK BRAKE SYSTEM ACTIVATION (ABS) AT MEDIUM AND LOW SPEEDS. THIS CONDITION RESULTS IN INCREASED STOPPING DISTANCES EVEN AT MEDIUM BRAKING PEDAL PRESSURE. *JB
NHTSA ODI #10158250
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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