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What is the rated fuel economy for a 2005 2500hd crew cab with the duramax and allison combo. I cant find this info anywhere. I just bought this truck and would like to see how it compares to the factory specs.
 

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the reason you can't find them is because they are not rated. The EPA doesn't do ratings for vehicles over a certain GVWR, I think its in the mid 8000 range so the 9200 GVWR 2500HD doesn't get rated.
 
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