2004 GMC Sierra 2500 HD: Rock-Solid Sierra

A Full-Pulling, 12-Second DuramaxImagine you could build a Duramax that lived on the brink of destruction yet was indestructible. Somehow, we found just that in Andrew Karker’s ’04 GMC Sierra 2500 HD. Even when producing more than 600 rwhp, the 150,000-mile stock-bottom-end LB7 survives, and the truck consistently places toward the top at competitive sled pulls.


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