GMC Yukon 2012 Owner's Manual page 449

Make sure the retainer is fully
seated across the underside of
the wheel.
3. Assemble the two jack handle
extensions (D) and wheel
wrench (E) as shown.
4. Insert the open end of the
extension (J) through the hole in
the rear bumper (I) (hoist shaft
access hole).
5. Raise the tire part way upward.
Make sure the retainer is seated
in the wheel opening.
6. Raise the tire fully against the
underside of the vehicle by
turning the wheel wrench
clockwise until you hear two
clicks or feel it skip twice. The
cable cannot be overtightened.
Vehicle Care
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 to
tighten the cable.
8. Reinstall the spare tire lock.
9. Reinstall the hoist shaft access
cover.
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