2003 Chevrolet Silverado SS. 6L Vortec. Extended cab, Short box. 5300LBS. curb weight. Full time, non-negotiable AWD. Shares aerodynamics with a block of wood. Hedgehogs. Egyptian pyramids.
Mixed driving MPG average: 16.4
Highway MAX MPG - wind at tail, rolling down a hill: 55
Pulling away from a stop light while smirking at the guy that was beside you as he shrinks in the rearview: ...single, LOW digits. (Seriously. Like 6~1 MPG depending on how hard I kick her tailbones)
27 gallon capacity on 91+octane fuel *required*. Typical tank range before low fuel light comes on is about...oooh...400-ish. I never really calculated it out by hand, just used DIC display and scan-tool estimates. It most likely lies for all I know.
You don't own her for miles per gallon. You *drive* her for *SMILES* per gallon. Any fellow sport-truck owner knows what I mean every time their right toe even slightly twitches on the throttle. ^.^