2024 Gmc At4x Hd. 17 x 8 (43.2 cm x 20.3 cm) black high gloss machined finish aluminum. It's the first time an at4x model is available on sierra hd trucks.

The 2024 gmc acadia trims gmc predicts the take rate for the acadia will shake out like this — 50% elevation, 20% at4, and 30% denali. Gmc did add a new model for the new year with the at4x aev.