1998 GMC Savana Van Owner's Manual - Page 225

Removing the Spare Tire and Tools Unless your vehicle hasa flat rear tire, do not remove or restore a tire fromho a storage position under the vehicle while the vehicle is supportedby a jack. Always tighten the tire fully against the underside of the vehicle when restoring. If you have a vehicle which was completed from a cab and chassis, refer to the information from the body supplierhnstaller. The spare tire is a full size tire, like the other tires on your vehicle. Your spare tire is stored underneath the rear of your vehicle. You will use the ratchet and extension to lower the spare tire. A flat rear tire reduces clearance to remove the spare tire. If there is less than 12 inches (30.48 cm) between the ground and the rearbumper or any trailer hitch, jack up the vehicle until the flat tire is off the ground. (See "Removing the Flat Tire" and "Installing the Spare Tire," Steps 4 through 8, in this section.) Remove the retaining wing bolt and lift it off the mounting bracket. Set the jack and jacking equipment near the flat tire. 5-23