Pricing will be announced closer to the truck's launch date.
GMC said the special model "reflects a popular personalization trend among off-road enthusiasts."
The Sierra All Terrain X is offered on the 2016 Sierra 1500 4WD crew cab/short box models with SLT trim.
Details include a Z71 off-road suspension package with Rancho monotube shocks, a high-capacity air cleaner, hill descent control and an underbody transfer case shield.
The All Terrrain X also features black exterior trim, rear park assist, a unique grille, spray-on bedliner and an inclinometer in the instrument cluster.
General Motors is putting a major emphasis on special truck models, including the 2016 Chevrolet Silverado Realtree edition and 2016 GMC Sierra Elevation, as car shoppers demand affordable customization.
Duncan Aldred, vice president of GMC sales and marketing, said the goal is to provide car shoppers with "more choices for finding the premium truck that matches customers' style and capability needs."
Edmunds says: Truck buyers who want a go-anywhere vehicle with a great look should make plans for a GMC showroom visit in a few weeks.