The next-generation GMC Sierra 1500 will offer a large dash-mounted display on all models, based on new spy photos.Even the fleet-friendly Sierra Pro will have a big screen, though it's different than the one in the top-of-the-line Denali. The 2027 GMC Sierra 1500 Pro will feature a simpler grille than the Denali, and it'll roll on workman-like steel wheels too.