2024 GMC Sierra HD AT4X Unveiled as a ZR2 Replica Featuring Comfortable Seats with Massage Functionality

Noteworthy is the fact that the Sierra HD AT4X retains the 6.6-liter gas V8 engine as standard, generating 401 horsepower and 464 pound-feet of torque. While commendable, this falls short in comparison to the 6.6-liter Duramax diesel powertrain that boasts 470 hp and a substantial 975 lb-ft of torque. Typically, most buyers opt for the latter option, both of which are mated to a 10-speed Allison automatic transmission. Although an electronic rear locker comes as standard, a front locker is absent; GMC asserts that its Off-Road Mode is adept at adjusting throttle response and transmission shifts to negate the necessity for one.

A standout feature of GM’s latest heavy-duty off-road pickup lies within its suspension setup. The truck showcases newly developed upper and lower control arms specific to the AT4X variant, a notable aspect considering it stands as the sole truck in its class equipped with independent front suspension—alongside the Silverado HD ZR2. The inclusion of Multimatic DSSV dampers, previously utilized in various high-performance applications including Indy cars and GM race trucks, now underscores the capability of this substantial vehicle. Detailed examination of the spool-valve technology would prove enlightening, yet the critical takeaway is their ability to consistently deliver superior damping even under strenuous conditions and elevated temperatures.

Thanks to the robust frame and suspension system, the GMC excels in towing, with a capacity of 18,500 pounds. Solely offered as a 2500 series pickup, there are no one-ton or 3500 series variants available. However, this towing capability should suffice for individuals seeking to venture into remote areas, detaching their camper for a day of off-road exploration. Ensuring the trails are sufficiently wide is crucial, making the desert terrain particularly suitable for such endeavors.

For safeguarding against rocks, a steel skid plate protects the transfer case, while the front skid plate is crafted from aluminum unless upgraded to the AEV Edition. Opting for this option not only affords all-steel underbody shielding but also introduces stamped steel bumpers capable of accommodating a front-mounted winch. The overall appearance is tied together by a set of 18-inch Salta wheels complemented by several AEV badges scattered throughout.

The primary rationale for selecting the GMC over the Chevrolet lies within its interior. Featuring a cab themed in what the automaker dubs an Obsidian Rush style, the truck boasts luxurious leather seats with massage functionality to ensure relaxation even amidst challenging driving scenarios. While personally, I might find it distracting maneuvering through a demanding rock garden with something kneading my lower back, others may find it invigorating. With a total of 14 camera perspectives available, displaying real-time footage on the 13.4-inch digital touchscreen, visibility is significantly enhanced—from what lies ahead to what lurks behind and underneath. Complementing this setup is a 12.3-inch digital gauge cluster and a 15-inch heads-up display, presenting a wealth of information to the driver. Finally, Vanta Ash wood accents and a 12-speaker Bose Premium Series sound system emphasis this cabin as an ideal haven for a day’s journey.

Supporting this extensive tech package are a host of safety features, including transparent trailer view, available trailer side blind-zone alert, and adaptive cruise control tailored for towing capabilities. These features aim to streamline the towing experience, a convenience valued by all, irrespective of expertise in pulling trailers or similar tasks.

Currently undisclosed is the pricing for this model; however, details are expected closer to its production slated for fall 2023. Anticipate a substantial sum, indicative of its likely premium positioning in the market. Undoubtedly, this model embodies a pioneering evolution in the realm of off-road vehicles.

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