1.radiator reservoir cap Compatible with CHEVY & BUICK & CADILLAC & GMC Vehicles ( Includ 2007 2008 2009 2010 2011 2012 2013 2014 Years Series), PLEASE CHECK THE DROP DOWN BAR TO CHECK THE COMPATIBLE.

2.coolant reservoir cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle's original component.

3.Radiator Surge Tank Cap maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off.

4.This radiator cap Dimensions: 10.921Cm (L) X 14.223Cm (W) X 2.54Cm (H) has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

5.REPLACES the following models: BUICK ALLURE 2010，BUICK CASCADA 2016-2019，BUICK ENCLAVE 2018-2019，BUICK ENCORE 2013-2019，BUICK ENVISION 2016-2019，BUICK LACROSSE 2010-2019，BUICK REGAL 2011-2017，BUICK REGAL SPORTBACK 2018-2019，BUICK REGAL TOURX 2018-2019，BUICK VERANO 2012-2017，CADILLAC CT6 2016-2019，CADILLAC ELR 2014-2016，CADILLAC ESCALADE 2007-2014，CADILLAC SRX 2010-2016，CADILLAC XT4 2019，CADILLAC XT5 2017-2019，CADILLAC XT6 2020，CADILLAC XTS 2013-2019，CHEVROLET AVALANCHE 2007-2013，CHEVROLET BLAZER 2019，CHEVROLET COLORADO 2015-2019，CHEVROLET CORVETTE 2014-2019，CHEVROLET CRUZE 2011-2019，CHEVROLET CRUZE LIMITED 2016，CHEVROLET EQUINOX 2018-2019，CHEVROLET EXPRESS 2500 2010-2019，CHEVROLET EXPRESS 3500 2010-2019，CHEVROLET EXPRESS 4500 2010-2016，CHEVROLET IMPALA 2012-2019，CHEVROLET MALIBU LIMITED 2016，CHEVROLET ORLANDO 2012-2014，CHEVROLET SILVERADO 1500 2007-2019，CHEVROLET SILVERADO 2500 2007-2019，CHEVROLET SILVERADO 3500 2007-2019，CHEVROLET SONIC 2012-2019，CHEVROLET SPARK 2013-2019，CHEVROLET SUBURBAN 1500 2007-2014，CHEVROLET SUBURBAN 2500 2007-2013，CHEVROLET TAHOE 2007-2014，CHEVROLET TRAVERSE 2018-2019，CHEVROLET TRAX 2013-2019，CHEVROLET VOLT 2011-2019，GMC ACADIA 2017-2019，GMC CANYON 2015-2019，GMC SAVANA 2500 2010-2019，GMC SAVANA 3500 2010-2019，GMC SAVANA 4500 2010-2016，GMC SIERRA 1500 2007-2019，GMC SIERRA 2500 2007-2019，GMC SIERRA 3500 2007-2019，GMC TERRAIN 2018-2019，GMC YUKON 2007-2014，GMC YUKON XL 1500 2007-2014，GMC YUKON XL 2500 2007-2013，SAAB 9-4X 2011