The Environmental Protection Agency has yet to release its official highway, city and combined fuel economy ratings for the 2020 GMC Sierra 2500HD with the 6.6-liter L5P Duramax diesel V8 engine, but ...
The Chevrolet Silverado HD — and its corporate twin in the GMC Sierra HD — can be had with either a standard 6.6-liter gasoline V8, or the optional 6.6-liter Duramax turbo-diesel. Opting for the TD ...
Originally introduced in the 2020 Chevrolet Silverado 2500 HD and 3500 HD, the direct-injected 6.6 will be featured in the 2021 Chevrolet Express as well. Just like in the badge-engineered GMC Savana, ...
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