From Humble Origins: The Sierra Grande Concept doesn’t start as a fully-loaded AT4X. It originates as a stripped-down 2500 HD single-cab long-bed truck, to which AEV adds the AT4X driveline components. This includes steering knuckles, control arms, and the impressive Multimatic DSSV dampers, among other enhancements. The company further equips it with multiple skid plates and robust 40-inch off-road tires mounted on Salta XD wheels. Combined with a 1.5-inch suspension lift, this work truck is more than ready for off-road adventures without requiring a ladder to access the cabin or bed.