Yet another monster from the House of Hennessey

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When you hear the name “Hennessey” suffixed to any vehicle, you know it’s going to be a monster in all senses. The company has been transforming SUVs, sedans, and pickup trucks from nimble creatures into absolute beasts since the early ‘90s. Let’s say Hennessey drops massive amounts of gamma radiations into every vehicle to create Hulk versions of them.

The company already deals with the Raptor, Mustang, F-150, and GT, and will soon be adding the 2020 Bronco as well to its portfolio. The company even laid its hands on the Jeep Gladiator and plonked in a Hellcat engine to create a “Maximus” version that makes 1,000 horses. This time around, Hennessey has gotten hold of the GMC Sierra Denali.The power bumps are significant and it looks mighty big with the new raised stance. The company has moniker’d it the Goliath 700. It makes sense, doesn’t it?


In the stock form, the GMC Sierra Denali is one of the most luxurious trucks you can buy today. The truck is loaded to the gills and comes with all the bells and whistles you can ask for.

On the exterior front, it comes with C-shaped LED DRLs, LED headlights, and a chrome overdose. GMC even launched a Carbon Pro edition that makes the truck bed even tougher. It even features the useful MultiPro tailgate system. GMC has even provided cut-outs to haul dirt bikes and street motorcycles. Other features include stuff like a 15-inch Head-up Display, touchscreen system with Android Auto and Apple CarPlay, all-black cabin theme, and a 15-camera setup along with a trailering system. The Sierra Denali even boasts of best-in-class legroom and headroom.

2019 GMC Sierra Denali Exterior
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The GMC Sierra Denali trim is offered with two engine options. The first one is a 6.2-liter, V-8 engine that churns out 420 horses and 460 pound-feet of twist. It is mated to a 10-speed automatic transmission. The other one is a 5.3-liter, V-8 mill that develops 355 horses and 383 pound-feet of torque, and is mated to an eight-speed automatic gearbox.

Both these engines can be paired to a two-wheel or four-wheel drive setup. GMC offers the Denali trims with an exclusive Adaptive Ride Control that helps keep the suspension composed over all types of pavement. It monitors the road and adjusts the damping rates within milliseconds, so even rough roads don’t feel very bad.

GMC Sierra Denali specifications
Type: 6.2L V-8 VVT DI with Dynamic Fuel Management and Stop/Start 5.3L V-8 VVT DI with Dynamic Fuel Management and Stop/Start
Bore & Stroke (in / mm): 4.06 x 3.62 / 103.25 x 92 3.78 x 3.62 / 96 x 92
Block material: Cast aluminum Cast aluminum
Cylinder Head Material: Cast aluminum Cast aluminum
Valvetrain: Overhead valve, two valves per cylinder, variable valve timing Overhead valve, two valves per cylinder, variable valve timing
Fuel Delivery: Direct high-pressure fuel injection with Dynamic Fuel Management Direct high-pressure fuel injection with Dynamic Fuel Management
Horsepower (hp / kW @ rpm): 420 / 313 @ 5600 (SAE certified) 355 / 265 @ 5600 (SAE certified)
Torque (lb.-ft. / Nm @ rpm): 460 / 623 @ 4100 (SAE certified) 383 / 519 @ 4100 (SAE certified)


  • Blacked-out Grille
  • Goliath Front and Rear Bumpers
  • LED Lighting
  • Hennessey Ram Air Hood
  • Exclusive Hennessey Decals and Stickers
  • 20-inch, All-Black Hennessey Wheels
  • 35-inch Toyo Tires
  • MultiPro Tailgate Retained
2020 GMC Sierra Denali Goliath 700 by Hennessey
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Coming back to the Hennessey iteration of the Sierra Denali, it is painted in black. Fortunately, it gets rid of all the chrome. It is just a black beauty without oodles of bling on all corners.

Up front, the Goliath 700 wears the same grille as the standard Denali, but is fully blacked out. Even the GMC logo is given the black treatment. No changes are made to the headlights and the fog lamps. The truck receives a new bumper with GOLIATH lettering carved into it. The front middle of the bumper extends out and it features an LED light bar. Apart from this, the bumper also features four other LED lights. This is part of the optional Goliath Off-Road Stage 1 Package.

2020 GMC Sierra Denali Goliath 700 by Hennessey
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Hennessey has also replaced the stock hood with a custom Ram Air Hood of its own that features a huge functional hood scoop right in the front. It comes with a honeycomb mesh in it. Hennessey also added an antenna at the base of the hood near the windshield on the passenger’s side. The windshield wears a Hennessey decal at the top. Surprisingly, there’s no other mention of the brand anywhere up front. All in all, the Goliath 700 is intimidating enough to make you swerve to the side if you spot it approaching you in the rear-view mirror.

Thanks to the raised stance and bigger tires, the Goliath 700 looks a lot different than the standard GMC Sierra Denali from the side as well.

It is devoid of any chrome elements here as well. The turn light indicators do not feature on the black flared wheel arches as they do in the regular truck. The 6.2-liter, V-8 badge is retained on the front fender as it is. Interestingly, the truck loses out on the telescopic, XL-sized mirrors and instead makes use of smaller units. Apart from the functionality, I personally feel they don’t match the butch looks of the Goliath. The standard mirrors came with a very weird frame, but it would’ve looked good on the Goliath’s all-black look. Hennessey has replaced the front door badges with ‘Goliath 700’ stickers. The side of the truck bed also features a Hennessey decal, the same as the one on the windshield.

2020 GMC Sierra Denali Goliath 700 by Hennessey
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When you opt for the Off-Road Stage 1 package, Hennessey equips the Goliath 700 with 20-inch, 10-spoke all-black Hennessey wheels. These wheels have silver bolts on the edge of the rim as well. The wheels are wrapped in 35-inch Toyo Open Country tires. Hennessey offers different levels of lifts depending on the trims. You can have a 3.5- or four-inch lift, which accommodates the 35-inch tires well. I think they’re perfectly sized and will offer better on-road performance than the 37-inch rollers. Bigger tires can still be installed if you wish, since the Goliath 700 can be had with a six-inch lift kit. This, too, is part of the Off-Road Stage 1 package. You can also opt for upgraded electronic fold-out steps that are available for extra moolah.

The rear looks good, especially in the night when the C-shaped LED taillights come to action. It is fairly plain compared to the other profiles of the truck, but sometimes simple is elegant.

Thankfully, Hennessey has retained the MultiPro tailgate as it is. The six-mode tailgate can work as a standing desk or can be folded down to create a step into the bed. It is basically two tailgates - an inception of sorts - wherein a fold-out stopper can be deployed from the inner tailgate. It can be operated at a push of a button or via the key fob; unless Hennessey has made any changes to this. The MultiPro tailgate can haul up to 375 pounds, and uses two buttons for operation.

2020 GMC Sierra Denali Goliath 700 by Hennessey
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You can spot Hennessey and Goliath 700 decals on either side, just above the bumper. The bumper is also replaced with a special piece that is offered as an additional upgrade. No, it isn’t part of the Off-Road Stage 1 package. The company also offers a stainless steel cat-back exhaust system as an additional upgrade. The company hasn’t mentioned if it makes use of the CarbonPro Edition Denali or the standard one. If it was the former, things would’ve been taken to the next level. In the standard Sierra, the CarbonPro edition increases the payload capacity by 59 pounds. With that said, Hennessey hasn’t laid out the towing and payload ratings for the Goliath 700.


  • Hennessey Embroidered Headrests
  • Serial-Numbered Plaque on the Dash
  • Optional Goliath Diamond Stitched Interior
2020 GMC Sierra Denali Goliath 700 by Hennessey
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The Sierra Denali has one of the plushest cabins you’ll see today. It exudes of luxury on all corners.

As it should be, Hennessey hasn’t made a whole lot of changes in here. The truck comes with Hennessey embroidered headrests as standard. You can opt for the Goliath Diamond Stitched interior for a premium. It comes with a serial-numbered plaque on the dash to remind you about its exclusivity every time you step inside. Hennessey hasn’t revealed much about the interior other than this. It is safe to assume that it will receive the standard features of the Denali as well.

2020 GMC Sierra Denali Goliath 700 by Hennessey
- image 887086

GMC offers a 15-camera setup on the Sierra Denali that lets the driver see right through a trailer by stitching together footage from a camera mounted on the tailgate and footage from an accessory camera that needs to be installed on the back of the trailer. This makes navigating the parking lots, merging into traffic or making tight turns a breeze. Other than this, it comes with stuff like an infotainment system with Android Auto and Apple CarPlay compatibility, a 15-inch-diagonal head-up display, and so on.


  • 6.2-liter, V-8 Engine
  • 2.9-liter Supercharger
  • 700 Horsepower
  • Serial-Numbered Engine Plaque
  • Custom HPE Camshaft
  • High-Flow Intercooling System
  • Optional Stainless Steel Cat-back Exhaust System
  • High-Flow Intercooling System
2020 GMC Sierra Denali Goliath 700 by Hennessey
- image 887082
The GMC Sierra Denali Goliath 700 by Hennessey makes use of the 6.2-liter engine from the Sierra in a different state of tune.

In standard form, the V-8 mill churns out 420 horses and 460 pound-feet of twist. Power is sent to the wheels via a 10-speed automatic transmission. Hennessey, however, installed a 2.9-liter Supercharger System as well that puts it on a different map altogether. The engine now churns out 700 horses at 6,300 rpm. The truck’s chassis is also dyno-tested and road-tested for 200 miles before being handed over to the customer. Hennessey has added these components as well to the Goliath 700:

  • High-Flow Intercooling System
  • High-Flow Air Induction System
  • Custom HPE Camshaft
  • Chromemoly Hardened Pushrods
  • Crankcase Ventilation System
  • HPE Engine Management Calibration
  • Serial-Numbered Engine Plaque


2020 GMC Sierra Denali Goliath 700 by Hennessey
- image 887089
Hennessey is selling the Supercharger package for $26,995. If you opt for the Off-Road Stage 1 Package, it’ll cost you an additional $14,950. Choosing all the other optional accessories will lighten your pocket by another $32,950.

Add the cost of the GMC Sierra Denali and you’re staring at a figure well-past the six-digit mark.

Final Thoughts

2020 GMC Sierra Denali Goliath 700 by Hennessey
- image 887075

The Hennessey Goliath 700 is all about the beastly looks and the performance. The company hasn’t mentioned anything about torque figures, which is a shame because adding extra pound-feet would’ve made this a wholesome package. For the first time, the emphasis of a Hennessey vehicle is not primarily on the engine and performance specs. The company has also bifurcated its packages so people have an option to choose for only a few items of all the changes made. This will also help reduce the cost to an extent. Nevertheless, when spec’d with all the accessories and packages, the Goliath 700 is a monster in itself.

  • Leave it
    • Performance specs not up to Hennessey standards
    • Fully-built trucks should’ve been in limited numbers
    • The pricing
Sidd Dhimaan
Sidd Dhimaan
Associate Editor and Truck Expert -
Sidd joined the team in 2017 as an intern and in less than a year he earned a full-time position as an associate editor and junior automotive expert. He is currently our pickup truck expert and focuses his attention on heavy-duty and off-road vehicles.  Read full bio
About the author

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