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The BD Diesel Allison cooler bypass delete for 2017–2019 Chevrolet/GM applications replaces the factory bypass assembly to keep the transmission cooler operational and prevent recirculation caused by debris-jammed valves. The kit includes a replacement block, all new seals and a magnetic service plug, restoring full fluid flow through the cooler and reducing the risk of elevated transmission temperatures and premature failure.
BD Diesel 17-19 Chevrolet/GM Allison Cooler Bypass Delete
