BEFORE & AFTER Small changes. BIG difference. See for yourself with our latest photo album of our 2021 GMC Sierra 1500 AT4. AT4 Premium Off-Road Appearance Package: — Painted GMC Emblems — Monochromatic painted trim — Red-Painted Brake Calipers — 22" BLACK RHINO wheels & NITTO Trail Grappler Tires — 2" Front Suspension Lift by ReadyLift — Tinted Windows with Window Guards — In-Channel Window Deflector — Tri-Fold Hard Bed Cover #custommade #2021gmcsierra #2021gmcsierra1500 #2021gmcsierra2500hd #2021gmcsierra3500 #sierra3500hd #sierradenali #gmctrucks #chevytrucks #dodgetrucks #fordtrucks #liftedtrucks #liftedtruck #customtrucks #sierra1500at4