1978 GMC Trucks Suburban Sales Folder. Suburban...the big, comfortable station wagon. Carry up to nine passengers, or carry 3,165 lbs of payload or tow up to 9,500 lbs with available equipment. Panel doors or tailgate. Shows seating options. Cutaway shows some of the big truck construction features. Power ventilation. High energy ignition. Delcotron generator. Delco Freedom battery, rugged V8 or In-line six power. Shows comfort and convenience items. Gives overview of how Full-Time 4-Wheel Drive works. Back has technical information. Form ADV 78-2