2023 GMC Sierra HD Refresh Caught Testing For The First Time 2023 GMC Sierra 2500 HD Facelift: What We Know So Far 2022 2023 2023 GMC Sierra HD Info, Availability, Features, Specs, Wiki New Exterior, Interior? 2023 GMC Sierra HD Spied testing YouTube 2023 GMC Sierra HD Refresh Spied With Production Headlights 2023 GMC Sierra 2500HD Specs, Changes, and Price Cool Pickup Trucks 2023 GMC Sierra HD Refresh Spied With Production Headlights UPDATE: “REFRESHED” HEAVY DUTY 2023 GMC Sierra & Chevrolet 2023 GMC Sierra HD Info, Availability, Features, Specs, Wiki