I traded for my Red Hot 2021 Custom Trail Boss 5.3L just yesterday. Wow! Awesome Vehicle. I can see now that my 2011 4.8L Silverado was getting worn out and tired. The Trail Boss is so amazing, and just the greatest looking in Red Hot paint. I'm seeing 19.2 - 20.0 MPG combined city/highway. Pretty impressive for this engine, Offroad equipped and the 3.42 rear end. Thanks for making a Forum!