I will now post one of the most embarrassing things ever the reason I pulled my truck into the shop was it was building no power or boost thought it was wiring issue since it would not throw any codes so I played around with it forever could not find any problem thought I would try to flash...
Starting to really hate my old truck it's a 2005 GMC 2500 lly I can't get it to start it won't try to start interior lights all work but will get no power to starter I removed relay and jumped a wire from side to side and than it will crank but it won't Fire .
I removed engine harnesses and...