It is necessary to regularly check and replace your own transmission cooler, for example, when the load overheats, it can reduce the average operating temperature by as much as 20% and increase the service life of the ATF; it also allows you to perform oil level checks without the need for a preheat cycle.
Engineered with a integrated bypass valve, the STL010 kit is designed to help maintain proper flow to the transmission cooler. This proactive approach to managing circulation supports the overall cooling system's performance and reliability
Bypass Gasket Fitment List 1: This bypass gasket is a direct replacement for OE part #66219. It ensures a proper seal in the transmission oil cooler hose and tube assembly for a wide range of GM vehicles, including: Buick: Encore (2020) Cadillac: ATS (2013-2018), CT4 (2020), CT5 (2020), CT6 (2016-2020), CTS (2009-2019), XLR (2006-2009) Chevrolet: Avalanche (2009-2013), Camaro (2010-2021), Corvette (2006-2019), Express 2500 & 3500 (2010-2020)
Bypass Gasket Fitment List 2: Continue to check compatibility with the following GMC, Hummer, and Pontiac models: GMC: Canyon (2015-2020), Savana 2500/3500/4500 (2010-2020), Sierra 1500 (2007-2021), Sierra 2500 (2007-2020), Yukon (2007-2021), Yukon XL (2015-2021) Hummer: H2 (2008-2009) Pontiac: G8 (2008) For additional vehicle applications, please refer to the detailed fitment guide on the product page.