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GM Hot Hydroboost
Posted to HD/Fleet Forum on 7/20/2020 19 Replies

Hello everyone, we have a 2006 C4500 with a 6.6L Duramax. Replaced the hydroboost because it was leaking fluid. We flushed the fluid with Dextron 6 and replaced the filter. It came back the following week with a leaking master cylinder. We replaced that as wel... Login to read more.

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