For 2011 - 2019 Chevrolet Silverado 2500 HD6.0L Only. For 2011 - 2019 Chevrolet Silverado 3500 HD6.0L Only. For 2011 - 2019 GMC Sierra 2500 HD6.0L Only. For 2011 - 2019 GMC Sierra 3500 HD6.0L Only. Do not loosen the radiator cap while the engine and radiator are hot.
