Debris in the stock cooler bypass valve can cause it to jam the internal valve, keeping it in recirculation mode. When this happens, the transmission temperature will rise, which can lead to overheating and premature transmission failure. The BD Cooler Bypass Delete keeps the transmission cooler operational all the time and eliminates this failure-prone item.. BD Diesel 19-23 Chevrolet Silverado / GMC Sierra 1500 8L90 Cooler Bypass Delete. Includes all new seals required for install, and magnetic service plug. Includes all new seals required for install/and magnetic service plug. COOLER BYPASS DELETE CHEVY SILVERADO/GMC SIERRA 1500 8L90 2019-2023. Replaces OEM Part Numbers: 85048209, 84443930, 84963102, 84969051. Ensures 100 Percent fluid flow through the transmission cooler. Automatic Transmission Oil Cooler Bypass Tube Eliminator. Ensures 100% fluid flow through the transmission cooler. Keeps Your Transmission Temperature As Low As Possible. Fits GM 8L90 Transmissions with 1/2 in. cooler lines. Transmission Oil Cooler Bypass Tube Eliminator Kit;. Transmission Oil Cooler Bypass Tube Eliminator Kit. COOLER BYPASS DELETE CHEVY 2019-2023. Eliminates Factory Bypass Valve. COOLER BYPASS DELETE. A/TBpsTubeElim

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