Introducing the Hennessey GOLIATH 700 GMC Sierra AT4—a luxury off-road truck with the horsepower to back up its premium reputation. Built around GMC’s refined AT4 platform, the GOLIATH 700 upgrade adds a high-performance supercharger system to the 6.2L V8, delivering 700 horsepower along with stronger acceleration, sharper throttle response, and unmistakable Hennessey performance.