WCFab Billet Anodized Transmission Cooler Thermostat Bypass Plug for Select 2014-2020 GM Trucks & SUVs

Fits select 2014-2020 Chevrolet Silverado/GMC Sierra 1500, 2500HD, 3500HD, Tahoe, Suburban, Yukon, and Cadillac Escalade (4.3L / 5.3L / 6.2L / 6.6L Duramax). This WCFab Transmission Cooler Thermostat Bypass Plug is a high-performance direct replacement for the failure-prone OEM thermostat found in GM 6L80, 6L90, and 8L90 transmissions.

By eliminating the restrictive factory thermal valve, this bypass plug allows for immediate and maximum fluid flow to the transmission cooler. In testing, this modification has shown fluid temperature drops of 15-50°F, protecting your transmission from the dangerous heat soak often experienced during heavy towing or in warm climate conditions. The CNC-machined billet aluminum construction ensures a precise fit and long-term durability compared to the stock plastic or cast components.

• Direct replacement for OEM part number: WCF100469
• Reduces fluid flow restriction to the transmission cooler
• CNC machined billet aluminum construction with a black anodized finish
• Equipped with high-temperature silicone O-ring seals for a leak-free fit
• Quick and easy installation; easily reversible for cold weather operation
• Recommended for both stock and built transmissions