Currently in the process of putting a 5.3 / 4l60e into my Jeep. Cable TB for simplicity. Are there any advantages to running a particular ECM or OS?
I don't have an ECM yet. I'm thinking that I'd like to use a 04 GTO setup so I can play with the LC function and maybe eek out an extra mpg or two.
Any do's or don'ts I should look out for?
What would you use?
Thanks