The 2019 Chevrolet Colorado ZR2 Bison pickup truck unveiled Thursday takes off-roading to extremes. Chevy and an aftermarket outfitter best known for its modified Jeep Wranglers teamed up to create the ZR2 Bison, which will go on sale next January. Michigan-based American Expedition Vehicles (AEV) took the already capable Colorado ZR2 and added a...