1968 GMC Trucks Diesel Powered Steel Tilt Models Sales Brochure. GMC's Steel Tilts mean business. Meet GMC's rugged team of diesel-powered steel tilt models. This versatile line includes both single- and tandem-axle units with enough difference in specifications to fill a wide variety of truck applications. All models featura GMC's 72" BBC cab that provides better front-axle weight distribution and permits the use of longer bodies and trailers. Check the wide choice of durable, high-quality components shown in this folder. You'll see why GMC's -- built, sold and serviced by truck people -- mean business...for you. Specifications at back. Good condition for its age with some wear and soiling and has writing and notations made throughout [see photos].