6L80 6L90 8L80 8L90 Transmission Sure Cool Thermostat Bypass Kit
Specifically designed for GM 6L80, 6L90 (2014 onwards), 8L80, 8L90, and 10L90 (2016 onwards) transmissions. 6L90 8L90 6L80 Sure Cool System STL010 with Bypass Gasket for (2014+) 6L80/90E, 8L80/90E (2016+) 15251488 STL010 Thermostat Bypass Kit.