2024 Gmc Sierra At4x Review Usa. The 2024 gmc sierra 2500 hd at4x aev edition adds functional style from american expedition vehicles trove of aftermarket accessories in a production package. Moving up from the pro model, the sle has a lot of similar features but includes numerous standard and available upgrades.

 — these days, gmc offers six vehicles with the at4 package: Research the 2024 gmc sierra 1500 with our expert reviews and ratings.