What year truck and are you looking at a completely new aftermarket setup with Sat? I can't speak to an aftermarket swap but I added Mopar's Sat system to my 06 RC with the REC NAV radio. This system integrates with the factory REC and consists of an antenna, receiver and wiring harness. I had my local dealer do the install mainly because I didn't have the heart to drill holes into my brand new truck's roof. And besides if I screwed something up, I'd have to pay -- if the delaer screwed it up, it was on their nickle. I do recall from the install instructions, besides drilling holes in the roof (with a supplied template), removal of several interior trim pieces, lowering the headliner and removing the OEM radio were all required. The harness was plug and play. The receiver box was installed on a supplied bracket that attached to the dash structure, located behind the glove box. It took my dealer an hour to do the install and it's covered under my base 3/36 warranty. The antenna size is roughly 3" long by 2" wide, shaped a bit like a triangle. I can send a pic or 2 of this later today. I hope this helps.