NHTSA owner reports · September 18, 2026 snapshot.
Power Train complaints
12 reportsClear category filter158,000 miles · Sep 29, 2014
Power TrainSuspension
WHILE TOWING A 30 FT 5TH WHEEL TRAILER THE FRAME VIBRATES FOR A PERIOD OF TIME BETWEEN 55 TO 65 MPH. FEELS LIKE A DRIVE SHAFT U JOINT FAILURE AS IT SEEMS TO BE PROGRESSIVELY WORSENING OVER SEVERAL RECENT TRIPS, BUT MAY BE DUE TO ROAD CONDITIONS. NOT PREDICTABLE BETWEEN ACCELERATION OR DECELERATION, JUST STARTS TO VIBRATE. CAN BE…
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WHILE TOWING A 30 FT 5TH WHEEL TRAILER THE FRAME VIBRATES FOR A PERIOD OF TIME BETWEEN 55 TO 65 MPH. FEELS LIKE A DRIVE SHAFT U JOINT FAILURE AS IT SEEMS TO BE PROGRESSIVELY WORSENING OVER SEVERAL RECENT TRIPS, BUT MAY BE DUE TO ROAD CONDITIONS. NOT PREDICTABLE BETWEEN ACCELERATION OR DECELERATION, JUST STARTS TO VIBRATE. CAN BE SEVERE ENOUGH TO BE STARTLING AT TIMES.POSSIBLY NHTSA #10021013 REFERENCE #3009. HAVE NOT FOUND REMEDY LISTED ANYWHERE. *TR
NHTSA ODI #10639783
121,000 miles · May 13, 2012
Power Train
THE HOLDING CLIP FOR THE OIL PUMP INSIDE OF TRANSFER CASE BROKE WHICH ALLOWED THE OIL PUMP TO SHAKE INSIDE OF CASE AND CONSEQUENTLY RUBBED A HOLE THRU T CASE WHICH EFFECTIVELY EMPTIED ALL THE LUBRICATING OIL FROM T CASE RUINING MOST OF THE PARTS INSIDE. *TR
NHTSA ODI #10458260
114,000 miles · Oct 10, 2011
Power Train
INTERNAL COMPONENTS WEAR A SMALL HOLE IN THE REAR OF THE CASE HOUSING ALLOWING THE FLUID TO LEAK OUT WITHOUT YOU KNOWING IT. ONCE THE FLUID IS GONE THE GEARS GRIND DOWN TO THE POINT WHERE THE TRANSMISSION LOCKS UP AND YOU SKID TO A STOP. I'VE BEEN TOLD THIS IS STILL AN ON GOING PROBLEM ALL THE WAY UP TO THE 2010 MODEL YEAR. *KB
NHTSA ODI #10429357
150,000 miles · Jul 5, 2011
Power Train
THERE IS A DEFECT IN THE TRANSFER CASE THAT RESULTS IN A CLIP BREAKING LOOSE AND RUBBING A HOLE IN THE REAR HOUSING, ALLOWING THE LUBRICANT TO LEAK OUT, WHICH CAN CAUSE THE TRANSFER CASE TO FAIL AND POSSIBLY LOCKING UP THE WHEELS IN AN UNEXPECTED MANNER, CAUSING A CRASH.
NHTSA ODI #10411233
64,000 miles · Feb 25, 2010
Power TrainService Brakes, HydraulicCrash
2002 CHEVROLET SUBURBAN 2500. IN PARKING LOT, PRESSED BRAKE AND TRUCK LURCHED FORWARD CAUSING DAMAGE TO MY SUBURBAN AND ANOTHER CAR RESULTING IN AN INSURANDE SURDHARGE FOR ACCIDENT OVER $2500. DEALER, MIRAK CHEVROLET OF ARLINGTON MA COULD NOT FIND DEFECT. UPON BRAKING TODAY,I FELT A SURGE FORWARD BUT NO ACCIDENT THIS TIME. P…
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2002 CHEVROLET SUBURBAN 2500. IN PARKING LOT, PRESSED BRAKE AND TRUCK LURCHED FORWARD CAUSING DAMAGE TO MY SUBURBAN AND ANOTHER CAR RESULTING IN AN INSURANDE SURDHARGE FOR ACCIDENT OVER $2500. DEALER, MIRAK CHEVROLET OF ARLINGTON MA COULD NOT FIND DEFECT. UPON BRAKING TODAY,I FELT A SURGE FORWARD BUT NO ACCIDENT THIS TIME. PLEASE ADVISE OF ANY PAST RECALLS OR SIMILAR INCIDENTS. *TR
NHTSA ODI #10314122
130,465 miles · Oct 15, 2007
Power Train
VIBRATION CLIP BREAKS INSIDE TRANSFER CASE RUBBING HOLE THRU REAR CASE HALF CAUSING LOSS OF FLUID AND RUINING ENTIRE TRANSFER CASE ASSEMBLY. REPAIR COST APPROX. $2000.00. *TR
NHTSA ODI #10205716
83,000 miles · Jun 12, 2007
Power Train
TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. AFTER THE VEHICLE WAS DRIVEN 65 MPH AND THEN PARKED, THE CONTACT NOTICED TRANSMISSION FLUID GUSHING OUT FROM UNDERNEATH THE VEHICLE. HE LATER DISCOVERED THAT THERE WAS A CRACK IN THE REAR TRANSMISSION ADAPTER, CAUSED BY A FAULTY UNIVERSAL JOINT. THE DEALER HAS REPAIRED T…
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TL*THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. AFTER THE VEHICLE WAS DRIVEN 65 MPH AND THEN PARKED, THE CONTACT NOTICED TRANSMISSION FLUID GUSHING OUT FROM UNDERNEATH THE VEHICLE. HE LATER DISCOVERED THAT THERE WAS A CRACK IN THE REAR TRANSMISSION ADAPTER, CAUSED BY A FAULTY UNIVERSAL JOINT. THE DEALER HAS REPAIRED THE VEHICLE. THE CURRENT MILEAGE IS 85,000 AND FAILURE MILEAGE WAS 83,000.
NHTSA ODI #10193074
92,000 miles · Feb 27, 2006
Power Train
ROUTINE MAINTENANCE REVEALED A LEAK IN THE TRANSFER CASE. THIS LEAD TO DISCOVER A SMALL HOLE IN THE CASE. THIS IS CAUSED BY A PART DEFECT THAT BREAKS OVER TIME. USUALLY AROUND 85,000 TO 105,000 MILES. THE PART IS AN "ANTI-RATTLE CLIP" THAT PREVENTS THE INNER PUMP FROM OF COURSE RATTLING. WHEN THIS PART BREAKS, THE PUMP THEN…
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ROUTINE MAINTENANCE REVEALED A LEAK IN THE TRANSFER CASE. THIS LEAD TO DISCOVER A SMALL HOLE IN THE CASE. THIS IS CAUSED BY A PART DEFECT THAT BREAKS OVER TIME. USUALLY AROUND 85,000 TO 105,000 MILES. THE PART IS AN "ANTI-RATTLE CLIP" THAT PREVENTS THE INNER PUMP FROM OF COURSE RATTLING. WHEN THIS PART BREAKS, THE PUMP THEN RUBS A HOLE FROM THE INSIDE OUT. IF THIS IS NOT CAUGHT IN TIME, THE LUBRICATING OIL WOULD RUN DRY AND THIS WOULD LEAD TO A DRIVETRAIN MALFUNCTION. I WILL BE ORDERING A REPLACEMENT TRANSFER CASE. YES OLD PART WILL BE AVAILABLE. NOTE: AS OF YET, THE REPLACEMENT PART FOR THIS HAS NO MODIFICATIONS TO PREVENT THIS FROM HAPPENING AGAIN. *JB
NHTSA ODI #10151286
34,000 miles · Aug 9, 2005
Fuel System, GasolineLatches/locks/linkagesParking Brake
I OWN A 2002 CHEV K2500HD. I HAVE HAD SEVERAL PROBLEMS, BUT WAS UNAWARE OF THIS SITE TO REPORT THESE PROBLEMS UNTIL NOW. FIRST, THE DRYER SWITCH ON THE AC WENT BAD @ 34K. SECOND,@ 65K I HAD TO REPLACE THE FRONT LEFT WHEEL HUB ASSEMBLY AS TALKED ABOUT IN ONE OF THE OTHER COMPLAINTS I READ. THIRD, @ 95K MY TRANSFER CASE DEVELOPED …
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I OWN A 2002 CHEV K2500HD. I HAVE HAD SEVERAL PROBLEMS, BUT WAS UNAWARE OF THIS SITE TO REPORT THESE PROBLEMS UNTIL NOW. FIRST, THE DRYER SWITCH ON THE AC WENT BAD @ 34K. SECOND,@ 65K I HAD TO REPLACE THE FRONT LEFT WHEEL HUB ASSEMBLY AS TALKED ABOUT IN ONE OF THE OTHER COMPLAINTS I READ. THIRD, @ 95K MY TRANSFER CASE DEVELOPED A LEAK AND I LOST ALL THE FLUID. A CHEVROLET MECHANIC SHOWED ME A TRANSFER CASE THAT HAD GONE BAD DUE TO THE SAME PROBLEM AND HAD BEEN USED IN 4WD W/OUT FLUID IN IT. ANOTHER CHEVROLET MECHANIC TOLD ME HE HAD SEEN SEVERAL OF THESE AND THAT "JB WELD IS YOUR FRIEND". SO I PATCHED THE HOLE, AND 10K LATER IT DEVELOPED A SECOND LEAK IN A SIMILAR LOCATION AND ALSO ABOUT THIS SAME TIME AN ELECTRICAL PART (ABOUT $550) WENT OUT FOR MY 4WD. NOW AT 130K IT HAS DEVELOPED A THIRD LEAK! ALSO STARTING @ APPROXIMATELY 50K, MY REAR DIFFERENTIAL HAS LOCKED UP ON ME SEVERAL TIMES AND I HAVE HAD TO REPLACE 4 CABLES ON MY TAILGATE. AFTER BEING A CHEVY MAN ALL MY LIFE I THINK I WILL LOOK AT TOYOTA. *NM
NHTSA ODI #10132114
Mileage unknown · Jul 20, 2005
Power Train
SOME TIMES WHEN I START MY 2500 HD CHEVROLET SILVERODO 4WD EXTENDED CAB TRUCK THE SERVICE 4WD INDICATER COMES ON AND WHEN I GO TO THE DEALER THEY TELL ME THEY DONT KNOW WHAT IT IS. IM THINKIN THAT ITS FALTY WIRING. IT ALSO MAKES AN AWFULE TICKING SOUND RIGHT WHEN I START IT TOO. ALL THE TIME.
NHTSA ODI #10129475
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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