Gmc Envoy Mpg I Have A GMC Envoy With The 5.3 DoD V8. What Can I Do To Enhance Gas Milage?!?

I have a GMC Envoy with the 5.3 DoD V8. What can I do to Enhance Gas Milage?!? - gmc envoy mpg

I was told that I can get a motor chip under $ 200 that I am to take up, at 6 MPG is over. What this chip, and where can I get one? ?

But what other options are there to improve fuel consumption??