OER Parts offers a wide selection of Seat Frame Parts for your 2012 GMC All Models. OER Parts offers 2012 GMC All Models Seat Back Panels, 2012 GMC All Models Seat Frames, 2012 GMC All Models Seat Knobs, 2012 GMC All Models Seat Mounting Brackets, 2012 GMC All Models Seat Springs, 2012 GMC All Models Seat Tracks, and 2012 GMC All Models Seat Trim.