The upcoming 2024 GMC Sierra HD AT4X is on the way, and the most recent spy shots are proving that. Sierra’s heavy-duty lineup of trucks is quite impressive. However, it is still behind the segment leaders such as Ford Super Duty or Ram HD. On the other hand, Sierra is constantly improving and now is closer to the top than ever before.
The AT4X trim level is basically an off-road variant. Indeed, you won’t find many off-road heavy-duty trucks. Naturally, it will rival Ram’s Rebel 2500 model. The AT4X off-road package comes with either a gas or diesel engine, which is great to hear. You can also choose various cab setups and bed sizes.
Sierra HD AT4X Spy Shots
The spied prototype wears lots of camo, which makes our job harder. However, the 2024 GMC Sierra HD AT4X will certainly introduce a mid-cycle facelift. This facelift will include a couple of nice exterior updates, while changes on the inside will be more dramatic. The truck will have chunkier 35-inch Goodyear Wrangler Territory MT tires and a new high-clearance front bumper.
More importantly, this version will offer the MultiMatic DSSV shocks. Of course, front and rear locking differentials are standard. Because of that, Sierra HD AT4X is instantly one of the most capable off-roaders in the heavy-duty truck segment. Besides Ram 2500 Rebel, Chevrolet Silverado HD ZR2 is also in the mix.
The interior of the 2024 GMC Sierra HD AT4X is quite impressive, which is somewhat surprising. This off-road truck has an incredible level of comfort, thanks to big seats and leather upholstery. Front seats are especially supportive. The AT4X package comes with stiffer suspension and it absorbs literally everything. Technology is also astonishing.
There is a very modern head-up display, lots of sensors, and cameras. On top of that, GMC provides standard built-in navigation, a Wi-Fi hotspot, and a universal digital gauge cluster. The infotainment system is powered by Google and it is very responsive and quick. It is a 13.4-inch touchscreen that looks very modern and upright. Lastly, this model will provide a premium Bose sound system.
Engine Options, Transmission, MPG
As we said, the 2024 GMC Sierra HD AT4X offers the choice of either a gasoline or diesel engine. This is good news. The truck sits on the GM T1 architecture and it comes with a standard 6.6-liter V8 petrol unit. This engine is capable of producing 401 horsepower and 464 lb-ft of torque. However, as this is an off-roading truck, a diesel powertrain is the real deal. A 6.6-liter turbodiesel V8 Duramax powertrain is capable of producing 470 hp and a torque of around 975 lb-ft. We don’t know if the manufacturer plans to deliver an additional level of torque in the following months.
All models are using the same 10-speed Allison automatic transmission. And while towing capacity and off-roading capabilities are astonishing, this truck is quite thirsty. Whatsoever, 14 mpg combined is far from good. Reportedly, during off-roading, fuel economy will drop to around 11 miles per gallon combined.
2024 GMC Sierra HD AT4X Price and Release Date
The price is not official yet, but new 2024 GMC Sierra HD AT4X will cost around $55,000 or slightly above that. The production will start this Spring, so, the sales will begin in the later stages of 2023, most likely this October.