This GMC Sierra-Based Hennessey Goliath 700 Isn’t A 6×6, But It Packs Some Serious Power

This supercharged Sierra cranks out 700 horsepower

This GMC Sierra-Based Hennessey Goliath 700 Isn't A 6x6, But Still Packs Some Serious Power

Anytime you hear the name “Hennessey”, you expect to see something big, bad and over the top. On Tuesday, the company announced this Hennessey Goliath 700 based on the GMC Sierra Denali, and on the surface it ticks both the “big” and “badass” boxes. This limited-run build packs more than simple aesthetic mods, however, bumping the power level up to eleven with the latest generation of GM trucks. It’s not quite the Goliath Silverado 6×6 we checked out last summer, but it also doesn’t pack the same $375,000 price tag.

This GMC Sierra-Based Hennessey Goliath 700 Isn't A 6x6, But Still Packs Some Serious Power

At the heart of this build is the 6.2-liter V8 engine you’ll find in the regular GMC Sierra 1500 Denali. In this supercharged package, though, Hennessey fits a 2.9-liter Whipple supercharger running at 6 pounds of boost. That bumps the total power output from the standard 420 horsepower to a whopping 700 horsepower at 6,300 RPM. On top of the supercharger, the Goliath 700 also packs a high-flow air intake and intercooler, as well as Hennessey’s own custom performance camshaft, chromoly pushrods, crankcase ventilation system and a revamped engine management calibration.

The Hennessey Goliath 700 runs on 93 Octane fuel to achieve those power figures, and also comes with Shell Rotella Gas Truck oil.

This GMC Sierra-Based Hennessey Goliath 700 Isn't A 6x6, But Still Packs Some Serious Power

More on the looks

Naturally, one of the first items you’ll see when you encounter this amped-up Sierra is the Goliath front bumper. Hennessey incorporated this aftermarket steel bumper into the build with five LED lights and red recovery hooks. The Hennessey Goliath 700 also has up to a six-inch lift from stock (depending on which trim level you buy from GM), as well as the company’s bespoke 20-inch wheels wrapped in 35-inch Toyo Open Country all-terrain tires.

Inside, the Goliath 700 has Hennessey-embroidered headrests, as well as a host of badging throughout the interior and exterior. If you want one of the few Goliaths the company plans to build, you can order directly through their website or by visiting your local Chevrolet or GMC dealer.

If you don’t necessarily want the huge power but you want the off-roading kit, you don’t have to buy the supercharger package. That costs $26,995, but the “Stage-1 Off-Road package” will set you back $14,950 on top of the base truck. The Stage-1 package includes the lift, custom 20-inch wheels, 35-inch tires and the Goliath bumper with LED lighting. While this Goliath 700 is based on the GMC Sierra Denali, you can order the build for any 6.2-liter 2019 or 2020 GMC Sierra or Chevrolet Silverado 1500.

Or, if you want to go in the other direction, there’s also a Goliath 800 with more than 800 horsepower thanks to a 6.8-liter stroker engine.