The 2023 GMC Sierra 1500 AT4X is being reviewed by various outlets, with some focusing on the standard model and others on the AEV Edition. The truck is being evaluated for its capabilities, with some reviews discussing its off-road performance and hardware. However, it's unclear how the different models and editions compare, as some outlets are also discussing other years and models, such as the 2024 Denali Ultimate and the 2026 Sierra EV AT4.