When the engine heats up, the coolant expands and releases excess pressure. As the engine cools, the fluid flows back into the radiator to maintain proper operation. Compatible with Cadillac: Escalade/Escalade ESV 2015-2020 6.2L. Compatible with Chevrolet: Silverado 1500 2014-2019 4.3L 5.3L, Silverado 1500 LD 2019 5.3L, Suburban 2015-2020 5.3L 6.0L 6.2L, Suburban 3500 HD 2016-2019 6.0L, Tahoe 2015-2020 5.3L 6.2L. Compatible with GMC: Sierra 1500 2015-2019 4.3L 5.3L 6.2L, Sierra 1500 Limited 2019 5.3L,Yukon 2015-2020 5.3L 6.2L, Yukon XL 2015-2019 5.3L 6.2L.
