That depends. Did you actually get an install, or are you only scheduled? If so, are you getting hd or sd? Hd will require a new dish. Sd may, if your locals are on the 119 satellite.
Why is (or did) the OP NOT have D* install the entire thing, which of course comes with the (FREE) required dish included?
First post, NO location, hmm - something's fishy here...