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What is towing capacity for 2005 Chevy with Duramax 6.6?

The towing capacity of a 2005 Chevy with a Duramax 6.6L engine depends heavily on the specific model and configuration of the truck. A 2500HD will have a significantly higher towing capacity than a 1500. Even within the 2500HD and 3500HD series, variations in options (like axle ratio, payload package, and even the bed configuration) will affect the maximum towing capacity.

You cannot determine the towing capacity without knowing the specific model (1500, 2500HD, 3500HD) and reviewing the sticker located inside the driver's side doorjamb. This sticker will list the GVWR (Gross Vehicle Weight Rating), GAWR (Gross Axle Weight Rating), and the maximum towing capacity for *that specific truck*.

Looking up the specs online for a general 2005 Chevy Duramax 6.6L will give you a range, but it won't be the precise number for your truck. Always check the doorjamb sticker.