Due to cost reductions and their already exceptional quality,

, the same heavy-duty engines are actually returned for the Bison, with prices starting at $45,000 for

 This indicates that the 6.6-liter engine beneath the hood of this beast is either an all-American

The first unit has 470 horsepower and 975 lb-ft of torque, the latter of which can be reached 

The 18,500-lb tow weight of this engine is mentioned in the movie.

Selecting the gas V8 gives you 464 lb-ft and 401 horsepower

 which is more appropriate for its almost 4,000-pound payload capacity.

As the film continues, we see one of the earliest Bisons, which were made in collaboration

with American Expedition Vehicles. It is filthy and still coated in mud from testing

 photo shoots.It's finally here: the Bison, or officially the Chevrolet Silverado HD ZR2 Bison.

GM is marketing it as the ultimate heavy-duty off-road pickup truck, and its goal is to not just 

Consequently, GM describes the truck's race-engineered setup in their press release