GMC 2007 Envoy Denali Owner's Manual page 480

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.
480
7. Make sure the tire is stored securely. Push,
pull (A), and then try to turn (B) the tire. If the
tire moves, use the wheel wrench and socket
end of the extension to tighten the cable.
8. Return the equipment to the proper location in
the vehicle as shown next.