The redesigned 2023 Sierra is getting a new off-road-focused package that GMC bills as its most capable 4x4 ever. The AT4X American Expedition Vehicles Edition adds AEV's stamped steel front and rear bumpers, boron steel skid plates, and 18-inch Salta wheels to the AT4X package. 33-inch Goodyear A/T tires and Multimatic DSSV spool-valve dampers give the AT4X AEV 11.2 inches of ground clearance, an approach angle of 32.5 degrees, departure angle of 23.4 degrees, and a breakover angle of 23 degrees — all improvements over the base AT4X. Throughout the interior and exterior is plenty of AEV branding along with gloss black accents. The AT4X AEV Edition will launch later in the 2023 model year.