Patented Protection US11725891B2 BEWARE OF counterfeits and fakes. STOP! Don't plug that bypass! Use this instead...
And **beware of offshore counterfeits** DEMAND SUPERIORS patented and patent-pending Sure~Cool STL010™, or STL020™ TBV Cooler~Flow Bypass safety systems.
GO TO: www.superiortransmission.com for more info and use the resources tab to find a distributor near you.

Superior's Sure~Cool® STL010™ keeps the factory bypass working to your advantage, LIKE THE FACTORY INTENDED, Let Superior Transmission Parts, Inc. Show YOU...WHY YOU NEED to use our patent-pending SURE~COOL® safety system STL010™ Cooler~Flow™ bypass for the 6L80, 8L90 some Allison L5P 17-19.

IN YOUR GM TRUCK...our SURE~COOL® System is dynamic and active. The OEM VERSION is a static pellet that when stuck...from overheating (above 210 deg.), or metal/friction debris CONTAMINATION that sticks the pellet type, shutting off VITAL Cooler Flow. You might be saying, HELLO to AN EXPENSIVE REPAIR.
(Search GM TSB 21-NA-199)

SURE-COOL® Part# STL010™
Fits GM TBV BLOCKS on 6L series 6 sp. and 8L series GM 8Sp.
Sure~ Cool® STL010™ also fits the year models involved in the
TSB No. 21-NA-199 effecting model years
86774933 2016-2018 Silverado/Sierra
2019 Silverado LO/ Sierra Limited (steel lines)
85547828 Silverado Sierra 2500HD/3500HD 85563685
2019-2021 Silverado/Sierra (aluminum lines), Express/Savana
NOTE: New/ LATE OCT. 2021 thru 2023 10L USE SURE-COOL® Part# STL020™ in Block# 92457300

NOTE: the STL010™ Allows you to re-use the existing GM block and Lines
With TSB Bulletin No.: 21-NA-199 Date: December, 2021 TBV FAILURE Thermal Bypass Valve pellet stuck NO FLOW burnt transmission

An "already" "STUCK, plugged OR PURPOSELY BLOCKED" bypass WILL NOT CREATE A LUBE~LOOP™ BACK INSIDE THE UNIT and eventually WILL SMOKE YOUR UNIT due to blocked cooler flow and lube to the internals. WE have the FIX and its patent-pending, AND EASY TO INSTALL IN ABOUT AN HOUR.
Remember... It only takes...One Click & 1 Minute™ to view.

Made in the USA, Always!