1993-1996 Chevrolet GP3500 5.7L V8 GAS;. 1993-1996 Chevrolet GP3500 7.4L V8 GAS;. Gates - Driven By Possibility. Fuel Tank Cap;. Pre-Release Fuel Tank Cap;. Excess fuel system pressure is relieved through an internal spring and gasket valve that is specially designed to allow venting without losing liquid fuel.
