What’s With the GM and Allison Split and Is Duramax Going Away?

I can answer that.
Aaron Turpen
Posted by November 17, 2025

General Motors and Allison Transmission have announced that their partnership will end at the end of 2025. What does this mean for GM vehicles with Allison Transmission labels on them and is Duramax going away with this split?

Aaron Turpen
Aaron Turpen
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An automotive enthusiast for most of his adult life, Aaron has worked in and around the industry in many ways. He is an accredited member of the Rocky Mountain Automotive Press (RMAP) and freelances as a writer and journalist around the Web and in print. You can find his portfolio at AaronOnAutos.com.