The GMC AT4 sub-brand can be found across Big Red's lineup, with the vast majority of models offering an AT4 variant. The ...

These days, GMC offers six vehicles with the AT4 package: three SUVs and three pickups, including the Canyon, Sierra 1500, ...

View all 2022 GMC Sierra ... the still-available AT4 off-road variant. GMC bills the AT4X as a balanced approach to a premium off-road pickup, delivering advanced off-road tech and capability ...