NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
351 reports71,662 miles · Jan 13, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 25 MPH, THE BRAKE PEDAL WAS APPLIED WHICH EXTENDED TO THE FLOOR WITHOUT ANY RESPONSE. THE VEHICLE FAILED TO SLOW DOWN AND IN ORDER TO STOP THE TRAILER BRAKES WERE ENGAGED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE ABS MODULE'S M…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE DRIVING APPROXIMATELY 25 MPH, THE BRAKE PEDAL WAS APPLIED WHICH EXTENDED TO THE FLOOR WITHOUT ANY RESPONSE. THE VEHICLE FAILED TO SLOW DOWN AND IN ORDER TO STOP THE TRAILER BRAKES WERE ENGAGED. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHERE THE ABS MODULE'S MAIN BRAKE LINE WAS REPLACED. THE FAILURE RECURRED AND THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC FOR THE SECOND TIME; HOWEVER THE MAIN BRAKE LINE CONNECTED TO THE MASTER CYLINDER WAS REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE DEFECT. THE APPROXIMATE FAILURE MILEAGE WAS 71,662.
NHTSA ODI #10443714
129,016 miles · Jan 13, 2012
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 4 MPH, THE BRAKE PEDAL EXTENDED TO FLOOR UPON ENGAGING. THERE WAS A SIGNIFICANT DELAY IN THE BRAKE RESPONSE. THE FAILURE RECURRED WHENEVER THE VEHICLE WAS IN MOTION AT LOW SPEEDS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 4 MPH, THE BRAKE PEDAL EXTENDED TO FLOOR UPON ENGAGING. THERE WAS A SIGNIFICANT DELAY IN THE BRAKE RESPONSE. THE FAILURE RECURRED WHENEVER THE VEHICLE WAS IN MOTION AT LOW SPEEDS. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE CONSTANT MALFUNCTION. THE APPROXIMATE FAILURE MILEAGE WAS 129,016. THE VIN WAS UNAVAILABLE.
NHTSA ODI #10443660
Mileage unknown · Jan 9, 2012
Service Brakes, HydraulicCrash
2002 CHEVROLET SILVERADO. STOPPING FROM SLOW SPEED AT INTERSECTION ANTI-LOCK BRAKES ENGAGED, TRUCK SHUDDERED, WOULD NOT STOP, HIT VEHICLE DIRECTLY IN FRONT OF. HAVE EXPERIENCED BRAKE ISSUES WITH VEHICLE SINCE DATE OF PURCHASE. WAS TAKEN IN FOR RECALL, BUT DANGEROUS BRAKE PROBLEMS PERSIST. VEHICLE IS UNSAFE TO DRIVE. *TR
NHTSA ODI #10442908
91,000 miles · Dec 31, 2011
Engine And Engine Cooling
AS MILLIONS OF OTHER COMPLAINTS FOR THIS SAME PROBLEM MY 2002 CHEVY 6.0LTR EXHAUST MANIFOLD BOLT HEADS ARE SNAPPING OFF AND BURNED THE GASKET OUT WHICH NOW FIRE SHOOTS OUT THE GAP AND THE EXHAUST IS NOW FILLING UP IN THE ENGINE COMPARTMENT AND TRAVELING INTO THE CAB. ALSO NOT TO MENTION THE EMISSIONS THAT ARE NOT BEING DISPLACED…
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AS MILLIONS OF OTHER COMPLAINTS FOR THIS SAME PROBLEM MY 2002 CHEVY 6.0LTR EXHAUST MANIFOLD BOLT HEADS ARE SNAPPING OFF AND BURNED THE GASKET OUT WHICH NOW FIRE SHOOTS OUT THE GAP AND THE EXHAUST IS NOW FILLING UP IN THE ENGINE COMPARTMENT AND TRAVELING INTO THE CAB. ALSO NOT TO MENTION THE EMISSIONS THAT ARE NOT BEING DISPLACED PROPERLY AND THAT IT IS RUINING MY CATALYTIC CONVERTER. NOT ONLY DOES THIS POSE A HUGE FIRE RISK THE FLAME THAT SHOOTS OUT IS DIRECTED RIGHT AT THE ENGINE COOLANT SENSOR AND IS BURNING IT, SOMEONE SOMEWHERE HAS SWEPT THIS PROBLEM UNDER THE RUG IT'S TIME TO ADDRESS THIS BEFORE SOMEONE GETS HURT. DO IT NOW !!!!!!!! DEMAND A RECALL!!!!!!! DO IT NOW!!!!!!! *KB
NHTSA ODI #10441960
71,000 miles · Dec 8, 2011
Engine And Engine Cooling
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH WHEN THE ENGINE STALLED WITH THE ILLUMINATION OF THE SRS WARNING INDICATOR. PRIOR TO THE FAILURE, THE CONTACT NOTICED THAT THE ENGINE WAS PERFORMING ROUGHLY. THE ENGINE WAS RESTARTED AFTER COOLING DOWN. THE FAILURE RECURRED THR…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. THE CONTACT WAS DRIVING APPROXIMATELY 55 MPH WHEN THE ENGINE STALLED WITH THE ILLUMINATION OF THE SRS WARNING INDICATOR. PRIOR TO THE FAILURE, THE CONTACT NOTICED THAT THE ENGINE WAS PERFORMING ROUGHLY. THE ENGINE WAS RESTARTED AFTER COOLING DOWN. THE FAILURE RECURRED THREE TIMES. THE CONTACT REFERENCED NHTSA CAMPAIGN ID NUMBER 07V52100 (ENGINE AND ENGINE COOLING) BUT WAS ADVISED THAT THE VIN WAS NOT INCLUDED IN THE RECALL. THE VEHICLE WAS TAKEN TO AN AUTHORIZED DEALER WHERE THE CAM SHAFT POSITION SENSOR WAS BEING REPLACED. THE MANUFACTURER WAS NOTIFIED OF THE DEFECT. THE APPROXIMATE FAILURE MILEAGE WAS 71,000.
NHTSA ODI #10439057
143,000 miles · Nov 28, 2011
Service Brakes, Hydraulic
I WAS PULLING INTO STREET FROM ALLY AND WHEN I APPLIED THE BRAKE, THEY WENT TO THE FLOOR AND LEFT A PUDDLE OF FLUID IN THE MIDDLE OF THE TRUCK FRAME, LUCKILY I WAS NOT IN TRAFFIC OR THIS COULD HAVE BEEN DAMAGING. *TR *KB
NHTSA ODI #10437595
100,000 miles · Nov 18, 2011
Service Brakes, Hydraulic
TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE APPROACHING A STOP SIGN THE CONTACT DEPRESSED THE BRAKE PEDAL BUT THE BRAKES WOULD NOT RESPOND AND THE PEDAL WENT ALL THE WAY TO THE FLOOR. THE CONTACT WAS ABLE TO STOP THE VEHICLE BY APPLYING EXCESSIVE FORCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THE BR…
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TL* THE CONTACT OWNS A 2002 CHEVROLET SILVERADO 2500 HD. WHILE APPROACHING A STOP SIGN THE CONTACT DEPRESSED THE BRAKE PEDAL BUT THE BRAKES WOULD NOT RESPOND AND THE PEDAL WENT ALL THE WAY TO THE FLOOR. THE CONTACT WAS ABLE TO STOP THE VEHICLE BY APPLYING EXCESSIVE FORCE. THE CONTACT INSPECTED THE VEHICLE AND NOTICED THAT THE BRAKE LINES WERE CORRODED, FRACTURED AND LEAKING. THE VEHICLE WAS TAKEN TO AN AUTO REPAIR SHOP FOR DIAGNOSTIC TESTING AND REPAIRS. THE FAILURE MILEAGE WAS 100,000. UPDATED 12/16/11 *BF
NHTSA ODI #10436383
101,000 miles · Nov 16, 2011
Service Brakes, Hydraulic
RUSTED BRAKE LINES. *TR
NHTSA ODI #10436079
60,000 miles · Nov 9, 2011
Service Brakes, Hydraulic
THE BRAKE LINES ON MY 2002 CHEVY 2500 HD COMPLETELY BLEW OUT CAUSING ME TO GO THROUGH A RED LIGHT ENDING UP IN THE MIDDLE OF THE INTERSECTION. *TR
NHTSA ODI #10435109
53,000 miles · Nov 7, 2011
Service Brakes, Hydraulic
BRAKE LINE FAILURE NEAR ABS MODULE INSIDE FRAME RAIL UNDER DRIVERS DOOR; FAILED IN OWNERS DRIVEWAY; USED EMERGENCY BRAKE TO STOP; INSPECTION OF BRAKE LINES INDICATES SEVERE RUSTING OF ALL LINES IN THAT AREA. *TR
NHTSA ODI #10434734
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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