1988 GMC K1500 Engine: 5.0L V8;. 1988 GMC K1500 Engine: 5.7L V8;. 1989 GMC K1500 Engine: 5.0L V8;. 1990 GMC K1500 Engine: 5.0L V8;. 1989 GMC K1500 Engine: 5.7L V8;. 1990 GMC K1500 Engine: 5.7L V8;. Part Type: Fuel Injection Throttle Body Mounting Gasket.