1982-1984 Chevrolet C15 4.1L L6 GAS;. 1982-1985 Chevrolet C15 5.7L V8 GAS;. 1982-1986 Chevrolet C15 4.8L L6 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.
