GM 6L80/90 and 8L90 Thermostat Bypass Plug

Designed to be a direct fit into the stock thermal bypass housing on your transmission cooler lines, these bypass plugs will keep your transmission running cooler therefore extending transmission life and preventing costly repairs due to a failed thermostat. CNC machined in the U.S.A. from 7075 aircraft grade aluminum and fitted with Buna O-rings these bypass plugs are ready to go. These fit many GM vehicles equipped with the 6L80/90 as well as the 8L90 transmissions, please verify before you buy. 

Note: When installing the thermal bypass plug verify that the housing is clean and free from corrosion and pitting near the top. If excess pitting or corrosion is present a leak may occur which will require the housing be replaced as well. Apply a liberal amount of transmission fluid to the O-rings to aid in a better installation and prevent tearing or cutting of the O-rings. 

Disclaimer: If you are unsure how to or you do not have adequate knowledge to install this bypass plug please work with a technician that can. TurnPro Tools is NOT liable for accidents or damage to personal property. Modification or tampering with OEM parts may affect your vehicles emission performance which is against federal law. Such products are intended for off road use only.