Sure, General Motors has taken a lot of heat from fans for not going after the Jeep Wrangler and the Ford Bronco, contorting what the Chevrolet Blazer means to customers, and not dropping a supercharger in the first-ever Chevrolet Silverado 1500 ZR2. However, the automaker has found a winning formula in the off-road space with its trucks, and looks to further expand the bandwidth of its offerings. In the process, GM will soon offer more off-road oriented trucks than any other manufacturer in a few years, as engineers are currently busy developing a pair of HD trucks that can take on the Ford S…