GMC takes the AT4X from off-road capable to overland-ready with production equipment from American Expedition Vehicles.

This 2022 GMC Sierra 3500HD Denali 4x4 is a Crew Cab-spec truck rocking a 6.6-liter Duramax turbodiesel V8 engine and $13,920 ...

Although these two share a lot of mechanical hardware, each offers a distinctive take on the luxo-truck formula.