Talked to guy with an 04 and a custom system, He had all kenwood stuff. The deck had everything, flip screen, touch screen controls, map tracker, DVD the works and his wheel controls were still hooked up. he said you just have to ask the stereo shop if the one you want has that option.
Oh ya, I had a 99 chev 4by with all the buttons, HATED them (trust a couple of wires that say go ahead your in 4 wheel, no thanks)