1997 GMC Suburban Owner's Manual - Page 278

For four-door utility models equipped with an underbody spare tire carrier, follow these instructions to restore a spare or flat tire: 1. Lay the tire on the ground at the rear of the vehicle. Position the tire so that the valve stem is pointed down and to the rear of the vehicle. 2. Tilt the retainer downward and through the wheel opening. Make sure that the retainer is fully seated across the underside of the wheel. Spare Tire A. Hoist Assembly -- 4-DOOr Utility Model E. Retainer E Valve Stem, Pointed Down G. Spare Tire 3. Attach the ratchet, with the UP mark facing you, near the hook at the end of the jack handle. Insert the other end, on an angle, through the hole in the rear bumper and into the hoist shaft. 4. Raise the tire fully against the underside of the B. Hoist Shaft C, Ratchet vehicle. Continue turning the ratchet until there are two "clicks" or "ratchets." The sparetire hoist cannot be over-tightened. 5. Grasp and push against the tire to be sure it is stored securely and does not move. D. Jack Handle 5-38