GMC has released the first images of the 2017 GMC Sierra Denali 2500 HD revealing that a key change could be in store for its updated workhorse when it eventually makes its way to dealer lots.
The company did not release a detailed description of the truck but did spill the beans on the fully functional hood scoop that allegedly serves as a hint to “what is beneath its bold new appearance.” That statement (albeit a bit cryptic) does appear to hint that a new engine is lurking under the hood of the updated rig, potentially serving as the successor to the long running but equally long in the tooth 6.6 liter Duramax diesel engine. The Duramax brings 397 horsepower and 765 lb-ft of torque to GM’s current line of HD pickups. However despite its long resume of appearances in both past and current GM models, the engine has also fallen behind newer diesel engines wielded by Ford and Ram with its figures being dwarfed by both the Cummins turbodiesel as well as the Powerstroke diesel V8.
As for the mystery engine, it could feature a new generation of turbocharging technology since the scoop would be feeding air to the hungry turbos inside increasing both power and torque in the process. This would be a stark change from the Duramax which also uses turbocharging, but does not take in outside air with a hood mounted hood scoop and tends to have more restricted airflow going into it. Look for it to possibly retain the Duramax moniker and arrive with multiple fuel saving features including reduced friction parts and improved weight savings.
GM claims that it will be releasing more information about its 2017 HD truck models “in the coming months” with full details not being revealed until its formal debut. The trucks will presumably begin arriving in dealer lots later this year with the Sierra possibly arriving first. The updated Silverado HD will not be too far behind, and could make its appearance early next year.