NHTSA owner reports · September 18, 2026 snapshot.
What owners actually said
134 reports278,000 miles · Nov 4, 2014
Service Brakes
DRIVING DOWN RURAL ROAD AT 55MPH, A DEER JUMPS INTO MY PATH. I QUICKLY BRAKE, ABS ACTIVATES AND PEDAL DROPS TO NEAR FLOOR. TRUCK DOES STOP, BUT BRAKING MUCH MORE DIFFERENT THAN NORMAL. DEER MOVES ON AND I START MOVING AGAIN. NEXT STOP SIGN I NOTICE THAT BRAKE PEDAL DROPS TO FLOOR, STILL BRAKING, BUT MUCH MORE DIFFICULT TO BRAKE.…
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DRIVING DOWN RURAL ROAD AT 55MPH, A DEER JUMPS INTO MY PATH. I QUICKLY BRAKE, ABS ACTIVATES AND PEDAL DROPS TO NEAR FLOOR. TRUCK DOES STOP, BUT BRAKING MUCH MORE DIFFERENT THAN NORMAL. DEER MOVES ON AND I START MOVING AGAIN. NEXT STOP SIGN I NOTICE THAT BRAKE PEDAL DROPS TO FLOOR, STILL BRAKING, BUT MUCH MORE DIFFICULT TO BRAKE. I MADE IT HOME AND NOTICED MY BRAKE LINE DIRECTLY UNDER THE DRIVER POSITION WAS SPRAYING FLUID NOW. *TR
NHTSA ODI #10652610
145,000 miles · Nov 4, 2014
Service Brakes
PULLING OUT OF MY DRIVEWAY ONTO THE STREET. APPLIED THE BRAKES WHEN REACHING THE END OF THE DRIVEWAY AND BRAKE PEDAL WHEN COMPLETELY TO THE FLOOR. WAS ABLE TO STOP, BEING THAT I WAS ONLY GOING AROUND 2 MPH AT THE TIME. WHEN I GOT OUT OF THE TRUCK, I SAW A LARGE AMOUNT OF BRAKE FLUID ON THE DRIVEWAY FROM A BURST BRAKE LINE. *TR
NHTSA ODI #10652609
127,318 miles · Sep 12, 2014
Air Bags
AIR BAG SENSOR WENT OUT. 4TH ALTERNATOR WAS REPLACED ON 6 JAN 14; THREE OTHERS WERE REPLACED BETWEEN 9 MAR2012 AND 6 JAN 14. RESISTOR FOR AIR CONDITIONING REPLACED ON 9 JUL 13. FRONT HUBS FAILED TWICE REQUIRING THEIR REPLACEMENT WITHIN SIX MONTHS. FRONT BRAKE PADS REPLACED TWICE IN 16 MONTHS AND 10,718 MILES. CHECK ENGINE L…
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AIR BAG SENSOR WENT OUT. 4TH ALTERNATOR WAS REPLACED ON 6 JAN 14; THREE OTHERS WERE REPLACED BETWEEN 9 MAR2012 AND 6 JAN 14. RESISTOR FOR AIR CONDITIONING REPLACED ON 9 JUL 13. FRONT HUBS FAILED TWICE REQUIRING THEIR REPLACEMENT WITHIN SIX MONTHS. FRONT BRAKE PADS REPLACED TWICE IN 16 MONTHS AND 10,718 MILES. CHECK ENGINE LIGHT HAS STAYED ON CONTINUOUSLY DURING THIS TIME, EVEN AFTER RESET ON FOUR OCCASIONS. *TR
NHTSA ODI #10632689
128,000 miles · Sep 12, 2014
Service Brakes
BRAKES FAILED WHILE DRIVING DOWN ROAD. ALL BRAKE LINES ARE SEVERELY RUSTED. IS THEIR A GALVANIC REACTION BETWEEN LINES AND TRUCK THAT IS CAUSING THIS? HAVE NEVER HAD BRAKE LINES RUST AS BADLY ON OTHER VEHICLES THAT WERE OLDER THAN THIS ONE. *TR
NHTSA ODI #10632686
100,108 miles · Sep 6, 2014
Service Brakes
I HAD BEEN DRIVING FOR 15-20 MILES BOTH ON AND OFF THE HIGHWAY AND THE VEHICLE STOPPED FINE. I WAS TRAVELING AT ABOUT 60 MPH AND WAS COMING UP ON HIGHWAY TRAFFIC THAT WAS AT A STANDSTILL . I STEPPED ON THE BRAKE PEDDLE AND IT WENT STRAIT TO THE FLOOR, ABSOLUTELY NO BRAKES AT ALL AND NO EVEN A HINT THIS WAS ABOUT TO HAPPEN. …
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I HAD BEEN DRIVING FOR 15-20 MILES BOTH ON AND OFF THE HIGHWAY AND THE VEHICLE STOPPED FINE. I WAS TRAVELING AT ABOUT 60 MPH AND WAS COMING UP ON HIGHWAY TRAFFIC THAT WAS AT A STANDSTILL . I STEPPED ON THE BRAKE PEDDLE AND IT WENT STRAIT TO THE FLOOR, ABSOLUTELY NO BRAKES AT ALL AND NO EVEN A HINT THIS WAS ABOUT TO HAPPEN. I WAS ABLE TO SWERVE OUT OF THE WAY, NARROWLY MISSING THE VEHICLE IN FRONT OF ME, AND USED THE TRANSMISSION AND E BRAKE TO GET THE VEHICLE STOPPED ON A GRASSY SHOULDER. HAD A VEHICLE BEEN NEXT TO ME OR A LESS EXPERIENCED DRIVER BEEN BEHIND THE WHEEL, IT MAY HAVE BEEN A MUCH WORSE OUTCOME . I KNOW AT LEAST 10 PEOPLE WHO OWN SIMILAR VEHICLES AND EVERYONE HAS HAD A BRAKE LINE FAILURE AT SOME POINT. GM NEEDS TO STEP UP AND COVER THIS BEFORE SOMEONE ELSE GET HURT OR KILLED! *TR
NHTSA ODI #10631205
120,000 miles · Jul 20, 2014
Service Brakes
2002 GMC SIERRA 2500HD 4X4 4DR COMPLETE BRAKE FAILURE WHEN MOVING VEHICLE AT HUNT CAMP.BRAKE PEDAL WENT COMPLETELY TO FLOOR.RUSTED BRAKE LINES BLEW UNDER DRIVERS DOOR LOCATION.LOCAL MECHANIC REPLACED LINES FROM MASTER CYL. TO ABS DEVICE. IF THIS HAD HAPPENED THE DAY BEFORE,WITH TRUCK LOADED WITH SUPPLIES ,EQPT.,AND TOWING A…
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2002 GMC SIERRA 2500HD 4X4 4DR COMPLETE BRAKE FAILURE WHEN MOVING VEHICLE AT HUNT CAMP.BRAKE PEDAL WENT COMPLETELY TO FLOOR.RUSTED BRAKE LINES BLEW UNDER DRIVERS DOOR LOCATION.LOCAL MECHANIC REPLACED LINES FROM MASTER CYL. TO ABS DEVICE. IF THIS HAD HAPPENED THE DAY BEFORE,WITH TRUCK LOADED WITH SUPPLIES ,EQPT.,AND TOWING AN ATV ON A TRAILER,NO WAY COULD I HAVE STOPPED THAT VEHICLE! I STILL NEED TO REPLACE ALL REMAINING RUSTED LINES GOING TO WHEELS. *TR
NHTSA ODI #10614850
67,000 miles · Jul 14, 2014
Service BrakesCrash
BACKING MY TRUCK DOWN A BOAT LAUNCH TO PUT A PWC IN. AS I APPLIED THE BRAKE AT THE BOTTOM OF THE RAMP, THE PEDAL WENT TO THE FLOOR, LOSING ALL BRAKES. SINCE I WAS CLOSE TO THE WATER, BY THE TIME I GOT IT INTO FORWARD, IT WAS ALREADY OVER THE EDGE OF THE RAMP INTO THE WATER. SUBMERGED UP TO THE BOTTOM OF THE ROOF. A TOTAL LOS…
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BACKING MY TRUCK DOWN A BOAT LAUNCH TO PUT A PWC IN. AS I APPLIED THE BRAKE AT THE BOTTOM OF THE RAMP, THE PEDAL WENT TO THE FLOOR, LOSING ALL BRAKES. SINCE I WAS CLOSE TO THE WATER, BY THE TIME I GOT IT INTO FORWARD, IT WAS ALREADY OVER THE EDGE OF THE RAMP INTO THE WATER. SUBMERGED UP TO THE BOTTOM OF THE ROOF. A TOTAL LOSS. *TR
NHTSA ODI #10610520
151,475 miles · Jul 13, 2014
Service Brakes
STEEL BRAKE LINE RUPTURED WITH NO WARNING UNDER THE DRIVERS SIDE FLOOR PANEL. IT WAS THE LINE FROM THE MASTER CYLINDER TO THE ANTI-LOCK BRAKE ACTUATOR. READ DOZENS OF ONLINE POSTINGS ABOUT THIS BEING A HUGE PROBLEM AND WAS ENCOURAGED TO REPORT IT. SAFELY STOPPING THE TRUCK (EMPTY) WAS VERY HARD AND I COULDN'T IMAGING WHAT WOU…
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STEEL BRAKE LINE RUPTURED WITH NO WARNING UNDER THE DRIVERS SIDE FLOOR PANEL. IT WAS THE LINE FROM THE MASTER CYLINDER TO THE ANTI-LOCK BRAKE ACTUATOR. READ DOZENS OF ONLINE POSTINGS ABOUT THIS BEING A HUGE PROBLEM AND WAS ENCOURAGED TO REPORT IT. SAFELY STOPPING THE TRUCK (EMPTY) WAS VERY HARD AND I COULDN'T IMAGING WHAT WOULD HAVE HAPPENED IF I HAD BEEN PULLING A TRAILER, WHICH IS VERY COMMON ON THIS TRUCK. *TR
NHTSA ODI #10610139
160,000 miles · Jul 8, 2014
Service Brakes
APPROACHING A STOP LIGHT OF A 55 MPH ROAD AND APPLIED THE BRAKES. THE TRUCK FAILED TO STOP. I WENT THROUGH THE RED LIGHT BUT DID NOT HIT ANY OTHER CARS. *JS
NHTSA ODI #10608834
113,729 miles · Jun 5, 2014
Service Brakes
BRAKES WENT OUT NO WARNING, AFTER LOOKING ON DRIVERS SIDE SEAT UNDER TRUCK WHERE FLUID WAS RUNNING OUT SAW WHERE BRAKE LINE WAS RUSTED AND IT BUSTED. SO I TOOK SEVERAL PICTURES AND CALLED GMC, THEY IN TURN TOWED MY TRUCK TO AUFFENBERG OF CARBONDALE, ILLINOIS AT NO CHARGE. AT THIS TIME I STARTED RESEARCHING THE RUSTED BRAKE PROBL…
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BRAKES WENT OUT NO WARNING, AFTER LOOKING ON DRIVERS SIDE SEAT UNDER TRUCK WHERE FLUID WAS RUNNING OUT SAW WHERE BRAKE LINE WAS RUSTED AND IT BUSTED. SO I TOOK SEVERAL PICTURES AND CALLED GMC, THEY IN TURN TOWED MY TRUCK TO AUFFENBERG OF CARBONDALE, ILLINOIS AT NO CHARGE. AT THIS TIME I STARTED RESEARCHING THE RUSTED BRAKE PROBLEM AND FOUND WHERE ALAN ADLER (MANAGER PRODUCT SAFETY COMMUNICATIONS) FOR GM SAID ON (ABC NEWS RUSTED BRAKE LINES) WHERE THEY WERE OFFERING A (KIT) TO HAVE THE RUSTED BRAKE LINES REPAIRED FOR A COST TO US OF $500.00. SO NOW TODAY 06/05/2014 MY TRUCK IS DONE AT A COST OF $1188.05 TO ME FOR THE DEALER KNOWS NOTHING OF THIS. I HAVE TRIED TO CONTACT ALAN ADLER THROUGH GM AND NO ONE KNOWS WHO HE IS, I HAVE SENT MANY COMPLAINTS AND TALKED WITH MANY PEOPLE AND NO ONE SEEMS TO KNOW WHAT I AM TALKING ABOUT. MY REF.# [XXX] WITH THE COMPLAINT DEPT. SO IF THIS MAN CAN SAY ON THE NEWS THAT THEY HAVE THIS KIT AND THAT ALL THE DEALERS WERE TOLD ABOUT IT HOW CAN THEY LIE AND CHARGE THE PEOPLE WHAT THEY WANT. THANK YOU INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR
NHTSA ODI #10596344
NHTSA investigations
3EA07013 · 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.
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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