my buddy and I have been working on his C10 that he put the 5.3 in. The ECM says 03 yukon and the harness is a stripped down OEM harness. last night was the first night at the track with it and for some reason the o2s don't seem to be reading right and its not showing fuel trims?
ill include the current .bin. its pretty stock other than the removal of the codes for the stuff that is no longer on the truck and the TM. also a short log from one pass at the track.