Rick , I have a 2012 36RL, the factory standard is one sat in and one cable in located in the utility compartment. I wanted to have a receiver in the bedroom and one in the living room to allow diff. Programs in each room. I had the factory install a second sat in so I have 2 sat in's and 1 cable in located in utility compartment. If your unit is still at factory you might ask them about having it done before delivery.
2011 GMC 3500 Duramax