The history of the Duramax diesel begins in 2001 ... What You Need To Know In one Reddit discussion about the fuel economy of the 2024 GMC Sierra 2500HD Denali Ultimate 6.6 Duramax, commenters ...

The 2016 Chevrolet Colorado Duramax and its similarly diesel-powered GMC Canyon sibling are the most fuel-efficient new trucks on the market in America. The Environmental Protection Agency ...

Debuting in the same heavy-duty Chevy Silverado and GMC ... last Duramax without all the modern emissions control tech that hobbles the fuel economy and reliability of many modern diesel engines.

GM has finally shoehorned the Duramax ... 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 ...