I am in the middle of a conversion on my '96 CK3500 from 7.4 gas to the LB7 duramax from an '03 2500hd. I have the engine mounted and "most" of the engine wires plugged in. I am at the point of filling fluids and seeing what happens when parts show up so I can get coolant in it. Something odd is going on in the fuel system, when I hooked up the batteries the injectors (maybe fuel pump?) started "buzzing" with the key off. It ran the battery down, after charging them up again I decided to try to pull codes to see if I could learn anything and the code reader will not power up, neither will the new fancy Edge CS tuner.
Does anyone have any ideas what I forgot to plug in? Should I just start cranking when I get the Dex-cool in it to see what happens?