Not off hand. I used the standard 21 circuit one. But, my car is real basic. If you have alot of electronics. Make sure you have enough circuits.

Also, the instructions are really good. I'd recommend downloading them from summit before you buy to see what your in for.

I used a painless gm universal harness on my gbody. Was much to install than i thought it would be. Made me question why I spent so much time trying to unpack my old wiring. You do have to disassemble like the whole car though.