GMC 2007 Yukon XL Owner's Manual page 524

3. Assemble the two jack handle extensions (D)
and wheel wrench (E) as shown.
5. Raise the tire part way upward. Make sure the
retainer is seated in the wheel opening.
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4. Insert the open end
of the extension (I)
through the hole in
the rear bumper (J)
(hoist shaft
access hole).
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. You cannot overtighten the cable.
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.