GM has finally shoehorned the Duramax 6600 in the 2006 Chevrolet Express and GMC Savana heavy-duty van offerings. It not only improves power (250 hp/460 lb.-ft) but is estimated to improve gas mileage to 20.2 mpg, upping the competition by 2 mpg. With the absence of the Ram full-size van (the Sprinter fills the slot) only GM and Ford are vying for 300,000-plus yearly sales in the contractor-friendly large cargo van class.


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