Intended for use with a tank installed as an auxiliary tank using diesel fuel only. Driver can switch from truck's main tank to auxiliary tank while driving. Factory gauge indicates fuel level in either tank. With auxiliary tank, driver never has to worry about overfilling factory tank. Complete kit includes wiring harness, hoses, six-port switching valve, hardware, circuit breaker, switch, hose clamps, sending unit and instructions. Sending units are made for 12 1/2 in. depth. For Chevy, Dodge and Ford trucks and vehicles with Duramax engines. Call Northern at 1-800-221-0516 for the auxiliary fuel pump kit designed for your truck (please specify truck's make, model, year and engine type when ordering). Factory shipped.