swapping my sons 94 2wd 3.0 auto to 4wd auto. i assume i need a new wiring harness and ecm? engine and trans harness is 1 part, right? anyone selling one with ecm?

 

Yeah engine and trans is all 1. You will definitely need the 4wd ecu, but you might check your existing harness and see if there are any unused plugs. I know my 93 dlx pickup had all the sr5 wiring in it, even though none of it was used in my model.

If you wanna get crazy and MT swap it, I have a 3.0 ecu for that!

 

Are you making the 2WD truck into a 4WD truck, or are you just swapping an engine from a 2WD truck into a 4WD truck?