its a little easier these days, Carl did a super job,
but if you have an 05-06 , you can swap out to a auto 48re with the switch of a wiring harness.
or you can do a gm with an adapter plate, but with either you can now get tranny controllers, as which I had in my 04 with a 48re, they are stand alone controllers that let you control the trans, the one I had in my 04 48re ran about 2k, and controls all aspects of the valve body.
it does make the RC quick and fun, and fairly easy install.
but if you have an 05-06 , you can swap out to a auto 48re with the switch of a wiring harness.
or you can do a gm with an adapter plate, but with either you can now get tranny controllers, as which I had in my 04 with a 48re, they are stand alone controllers that let you control the trans, the one I had in my 04 48re ran about 2k, and controls all aspects of the valve body.
it does make the RC quick and fun, and fairly easy install.