Location: lower main or upper main; temperature. Vehicle Compatibility: The air actuator fits for 2014-2018 Chevy Silverado 1500, 2015-2018 Chevy Silverado 2500/Silverado 3500/Suburban/Tahoe, 2015-2019 Chevy Silverado 2500 HD/3500 HD, 2016-2018 Chevy Suburban 3500 HD, 2014-2018 GMC Sierra/Sierra 1500, 2015-2019 GMC Sierra 2500 HD/Sierra 3500 HD/Yukon/Yukon XL, 2015-2018 Cadillac Escalade/Escalade ESV.
