GM Trademarks ‘Z71 Trail Boss’ By Stephen Elmer Jan 23 2015 1 Share this Article Tweet A new GM trademark filing is hinting at a new off-road model. Continue Reading... Filed under: American Chevrolet Featured Articles GM TrucksTags: Chevy Colorado Z71 Trail Boss, Chevy Silverado Z71 Trail Boss, GM, Trail Boss, Z71 Trail Boss