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Allison 6sp: Duramax allison tranny issues
I have a 2009 GMC Sierra 2500 HD Duramax with a Suncoast stage 5 allison transmission that is not working I had a mechanic replace the IMS and internal harness as the P0708 code suggests this could be the problem. Did not fix it. When driving it after clearing the codes and disconnecting the...- AKhdironman
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- Forum: Mike L's Trans Talk