2025 Gmc Sierra 2500hd At4x. The 2025 gmc sierra 2500hd denali and at4 trims include 4wd, but it's optional on all other trim levels, which come with rwd as standard. The at4 cardonpro edition package is $1,125 and.

401 (gas) / 470 (diesel) With excellent gmc finance and lease offers, there’s no.