There's an interesting thing about early Chevrolet Silverado and GMC Sierra trucks equipped with the Duramax diesel engine and Allison transmission. From 2001-2005, these trucks were equipped with a ...

Chad Simper lives in Vernal, Utah, but shows up at dyno events and sled pulls all over the western half of the United States. His '05 Chevy 2500HD looks pretty normal until the hood lifts up. That's ...