Chevrolet's 4x4 pickup trucks, including heavy duty and diesel work trucks, are equipped with strength, towing, payload, and torque backed up by V8 engines. Aside from a tireless work ethic, Chevy trucks also offer comfort, technology, and even fuel-efficiency. The 6.6-liter Duramax diesel engine powers light and medium duty Chevy trucks with high-pressure common-rail, direct injection power.