7Pcs STL010 Flow Bypass Valve Kit Fit 2014-Up GM 6L80 6L90 Cadillac Chevy GMC Features: Application: The transmission cooling system upgrade kit fits for 6L80 6L90 2014-up, fits for 8L80 8L90E 2016-up, also fits for 10L90. Compatible with Cadillac Chevy GMC cars and trucks transmission. Why you Need: Transmission overheating occurs when the engine's cooler cannot maintain the transmission temperature at a low enough degree. The inability to keep the engine cool causes the transmission to become damaged and, if not repaired, fails. .