The new vehicles will allegedly arrive for the 2024 model year, so it’ll be a long time yet before we can expect to see the new trucks in the metal. The current Silverado HD and Sierra HD have been on sale since 2020, so although new trims have been added as part of updates, the range may be more comprehensively updated before the ZR2 and AT4X are launched.
With that said, we can expect some aspects of the vehicles to follow a certain recipe. Small front bumpers, skid plates, Multimatic DSSV dampers, locking differentials, larger tires, greater ground clearance, and a greater rear departure angle are all sure to be included.