GMC Sierra Owner's Manual page 372

7. If equipped with a spare tire cable, orient
the cable by rotating the spare tire so
that the cable is by the frame
attachment location.
8. 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.
9. Make sure the tire is stored securely.
Push, pull, and then try to turn the tire.
If the tire moves, use the wheel wrench
to tighten the cable.
Vehicle Care
If equipped with a spare tire cable,
reattach the clip to the frame
attachment bracket. Note that there may
be slack in the cable.
Repeat this tightness check procedure
when checking the spare tire pressure
according to the scheduled maintenance
information or any time the spare tire is
handled due to service of other
components.
Correctly Stored
371