2008 GMC Envoy Owner's Manual - Page 391

Follow this diagram to store the underbody-mounted flat or spare tire. A. Wheel Wrench B. Hoist Shaft C. Extension D. Retainer E. Spare or Flat Tire (Valve Stem Pointed Up) 3. Make sure the valve stem is pointed up and to the rear. 4. Pull the retainer (D) through the wheel. 5. Put the socket end of the extension (C) through the hole just above the rear bumper at a 45 degree angle downward. Connect the socket end of the extension to the hoist shaft (B). 6. Raise the tire fully against the underside of the vehicle. Continue turning the wheel wrench (A) clockwise until you hear two clicks or feel it skip twice. This indicates that the tire is secure and the cable is tight. The spare tire hoist cannot be overtightened. 1. Put the tire (E) on the ground at the rear of the vehicle. 2. Remove the hubcap, if the vehicle has one, from the flat tire by tapping the backside of the hubcap with the wheel wrench (A). Store in a safe location until the flat tire is repaired. Once the tire is repaired, replace the hubcap. 5-97