Abstract: An integrated power unit for use in a bed of a pickup truck. A lower housing is sized to fit between the rear wheel wells of the pickup truck, and opposed upper housings extend over respective opposed sidewalls of the truck bed. The opposed upper housings are adjustable with respect to the lower housing, so that the integrated power unit may be used with various makes and models of pickup trucks. The lower housing contains an internal combustion engine for generating mechanical power, an alternator and electrically driven compressors. Ducting and baffles facilitate air flow and cooling in the lower housing. A fuel tank is formed by one of the upper housings, and a control panel is located in the other upper housing. Connections for electrical power and regulated and unregulated pneumatic power are available at the control panel.