1978 GMC Caballero 5.0L V8 VIN: U. 1978 GMC Caballero 5.7L V8 VIN: L. 1978 GMC Caballero 3.8L V6 VIN: A. 1978 GMC Caballero 3.3L V6 VIN: M. Walker Products sensors are engineered using high quality components and materials to ensure proper fit and response.
