Going forward indefinitely, GMC will be looking for ways to generate awareness of its rugged AT4X sub-brand, and will lean on its capable trucks to do so. Making a big splash was the 2022 GMC Sierra AT4X Ultimate Overland concept in May at the 2022 Overland Expo West event. And as an even bigger follow-up, GMC and American Expedition Vehicles have collaborated to debut the 2023 GMC Sierra 1500 AT4X AEV Edition today at the 2022 Overland Expo Pacific Northwest event happening in Bend, Oregon. The 2023 Sierra 1500 AT4X. Image via GMC. As it stands, 2023 GMC Sierra 1500 AT4X AEV Edition is the mo…