A truck for towing a trailer includes a vehicle frame spine, a pair of suspension assemblies extending from either side of the vehicle frame spine and each supports a drive assembly at an end distal to the vehicle frame spine. Extensible struts are positioned between the vehicle frame spine and the drive assemblies allowing selection of vehicle drive height from a driving surface. A fifth wheel assembly is supported from the vehicle frame spine located above the drive assemblies. The fifth wheel assembly includes a fifth wheel and a fifth wheel lift which varies spacing of the fifth wheel from the vehicle frame spine. Control system selects strut extension based on a selected vehicle drive height and operates the lift assembly to counteract changes in vehicle drive height and maintain a constant fifth wheel drive height relative to the driving surface.