- Sep 11, 2016
So Im looking at finally getting back into swapping the 307 out for the 5.3 but looking at the factory wiring what do I need to keep? The factory harness is a nightmare.
I think I found the answers I was looking for but I plan on keeping AC, Heat and running a 2004r in the car. I understand that there are 2 separate harnesses, one for the computer and one for the ignition, tach etc. is that correct?Well, that's a pretty vague-assed question...... What are you doing for gauges? Are you keeping AC? What constitutes a nighmare (worse than a carbed 5.3 in a Cutlass)? What trans are you going to run?
The basics you need to keep are the 3 heavy gauge wires to the ignition switch (red, pink, and purple) aside from the front lights and horn harness.