Hypertech programmer on relatively unmodded truck?

I was looking at getting the hypertech max energy programmer for my 01 5.3L Burb. My question is, is it potentially dangerous (or if nothing else, would it be pointless) for the engine if I do it to a truck that's relatively unmodded? All I've done to it is drop in a K&N air filter. I'd like to get new exhaust from the headers on back and a cold air intake, but those are pretty pricey...so they'll have to wait for a while. In the meantime I was looking at getting the programmer to boost my fuel mileage.

Thanks in advance!!!