This replacement engine coolant thermostat housing is engineered to match the fit and durability of the stock thermostat housing on specified vehicles. It is designed to withstand extreme temperature changes to extend service life. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Chevrolet C1500: 1990] - [Chevrolet C3500: 1988, 1989, 1990] - [Chevrolet K3500: 1988, 1989, 1990] - [Chevrolet P30: 1990] - [Chevrolet R20 Suburban: 1987, 1988] - [Chevrolet R20: 1987, 1988] - [Chevrolet R2500 Suburban: 1989, 1990] - [Chevrolet R2500: 1989] - [Chevrolet R30: 1987, 1988] - [Chevrolet R3500: 1989, 1990] - [Chevrolet V20 Suburban: 1987, 1988] - [Chevrolet V30: 1987, 1988] - [Chevrolet V3500: 1989, 1990] - [GMC C3500: 1988, 1989, 1990] - [GMC K3500: 1988, 1989, 1990] - [GMC P3500: 1990] - [GMC R2500 Suburban: 1987, 1988, 1989, 1990] - [GMC R2500: 1987, 1988, 1989] - [GMC R3500: 1987, 1988, 1989, 1990] - [GMC V3500: 1987, 1988, 1989, 1990]