my 04 gmc sierra 2500hd 6.0

Asked by Nov 28, 2016 at 05:43 PM about the 2004 GMC Sierra 2500HD 4 Dr SLE 4WD Extended Cab SB HD

Question type: Maintenance & Repair

just rebuild the engine bigger cam little more compression headers had the
computer tuned from outta state got the computer back truck ran good little
trips to the corner store n back to break in the new engine and what not
starting getting hesitation shortly after doing this.. i then started driving it to
work because it ran ok for the first week so took it to work 5 miles away from
home ran good still hesatation  called tune company they said scan
computer for data i did sent over data they called back next day all data is
within specs i continued to drive the truck and 1 day truck shut off doom
dead got it to start right back up got 3or 400 feet died again this time wont
start nothing have it towed home went out an hour or so later fired up like
nothing happened computer place said crank sensor is going bad ? went got
a new one put it in tryed to start the truck no fire just cranks and cranks
called tuned company aka computer company and asked why this is
happening they said bad sensor i then went back to store to get a new 1
bwm brand and again put in the newer sensor and again truck wont start
with this brand new sensor but it will with the old 1 every time SOME ONE
HELP PLZZZZZZ PS truck has 150k on it engine has 70 miles had dealer
check for fuel pressure and loose wires grounds everything came back great
and intacked

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