2019 GMC Denali with 6.2. Stock except tonneau cover. Mixed city and highway over 1000 mile period = 17.5. Highway trips = 20.5. Pulling Polaris Ranger 1000 with full windshield on aluminum trailer = 10.5 - 13.0 depending on terrain. Very happy with my truck. Came from a F250 with Powerstroke
I’ve owned (2) 5.3 Liters and (1) 6.2 Liter which I currently have. The only reason I am still with GM is because of the 6.2 Liter. If this engine was not available, I would be in a Hemi or 5.0 Ford.
For you guys running a 4" or 4.5" lift on 33's - what kind of MPG are you getting? Spoke with a dealer who installs 6" BDS lifts and puts 35" tires on them. They told me after speedo recalibrate, the trucks get 12 MPG. I love the look but cannot handle that much fuel loss.