Jimmy Haddad at Feldman Chevrolet of Livonia The legend of Chevy Silverado takes another step Forward. First, we partnered with American Expedition Vehicles (AEV) to take the already formidable ZR2 and elevate it into the ultimate off-road beast with the Bison Edition. Next, we took a powerful ending lineup and enhanced the available Duramax 3.0L Turbo-Diesel engine with even more horsepower and torque. Add to that available advanced trailering technologies, a standard Durabed, and the hardworking capability of Silverado and you have the strength to handle whatever comes next.