GMC skipped the Raptor R and TRX fight entirely, so a Texas tuner stepped in with a supercharged Sierra At4
by Brad Anderson
6 hours ago
- Hennessey replaces the Sierra’s stock setup with a supercharged V8.
- The Sierra AT4 gains suspension upgrades and rugged steel bumpers.
- This upgraded pickup can sprint from 0-60 mph in just 4.2 seconds.
Some companies chase efficiency. Hennessey chases the opposite. Alongside making muscle cars even more extraordinary and building the European-rivaling Venom F5 hypercar, the tuning company knows plenty about making potent off-roaders even more outlandish. It has done exactly that again with its Goliath 700 package for the GMC Sierra AT4.
As standard, the Sierra AT4 comes with a 3.0-liter turbo-diesel inline-six, but for the Texas tuner, that engine is far too small. The Goliath 700 is based instead on the available 6.2-liter V8 Sierra AT4, now fitted with a massive supercharger.
The beefed-up engine churns out 700 hp at 5,500 rpm and 611 lb-ft (828 Nm) of torque at 4,200 rpm, meaning this beast can hit 60 mph (96 km/h) in just 4.2 seconds. In addition to adding an air-to-water intercooler and a stainless-steel catback exhaust with black tips, Hennessey has transformed the pickup to ensure it can conquer almost any terrain imaginable.
Watch: Hennessey’s Demon 1700 Makes More Torque At The Tires Than A Bugatti Chiron Makes At The Crank
The work starts at the front, with upgraded DBS components and new upper control arms. Multimatic’s excellent DSSV shocks carry over, and Hennessey has added new 20-inch wheels wrapped in 35-inch off-road tires.
Looks To Match
There’s no mistaking the Goliath 700 from a standard Sierra AT4 thanks to a host of other exterior upgrades. These include new steel front and rear bumpers, custom badging, a 40-inch LED light bar, three-inch LED pod lights, carbon fiber tailgate accents, electronic power running boards, and a Hennessey skid plate.
GMC hasn’t built a direct competitor to the Ram 1500 TRX and Ford F-150 Raptor R, but this is perhaps the closest truck you can get to one. Rounding out the upgrades are several interior tweaks, including new all-weather floor mats, numbered plaques, and embroidered headrests. As with other Hennessey packages, the Goliath 700 includes a three-year / 36,000-mile limited warranty.
