GMC 2010 Sierra Denali Owner's Manual page 476

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. You cannot
overtighten the cable.
6-102
4. Insert the hoist end (F)
through the hole (G) in
the rear bumper and
onto the hoist shaft.
Do not use the
chiseled end of the
wheel wrench.
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, if the vehicle has one.