The Colorado ZR2 Bison joins Chevrolet's midsize truck lineup as an all-new performance variant. Bison is Chevy's first collaboration with American Expedition Vehicles (AEV), a premium off-road aftermarket manufacturer. Through constant innovation, Chevy has gained more than a quarter of all midsize truck sales in less than four years in the marketplace. In consecutive years, Colorado introduced the segment's first diesel engine (excludes other GM vehicles), an all-new V-6 gas engine/eight-speed transmission combo, the ZR2... continue