Quote:
Originally Posted by 1972SuperCheyenne
Forgot to tell you, if it has a Duramax, it has an Allison. GM didnt put anything but the Allison behind the Duramax.
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As long as it was an automatic. For a few years they offered a 5 speed manual, and a 6 speed manual. I wanted the 6 speed manual, but I've been more than happy with the Allison!