2024 Gmc Sierra At4x Hd. The 2024 sierra hd at4x is rated to tow up to 18,500 pounds. The first ever sierra hd at4x and at4x aev edition is taking the at4 experience to the next level.

Here’s a list of official specs for the 2024 gmc sierra hd at4x & at4x aev edition. The 2024 gmc sierra hd at4x aev climbs, and moves, mountains.