GMC Yukon Denalid Owner's Manual page 515

Raise the vehicle far enough off the ground
so there is enough room for the spare
tire to clear the ground.
Rear Position — 1500 Models
Rear Tire Flat: If the flat tire is on a rear tire
of the vehicle, you will need to use the
jack handle (B) and both jack handle
extensions (C). Attach the wheel wrench (D)
to the jack handle extensions (C). Attach
the jack handle (B) to the jack (A).
Use the jacking pad provided on the rear axle.
Turn the wheel wrench (D) clockwise to
raise the vehicle. Raise the vehicle far enough
off the ground so there is enough room for
the spare tire to clear the ground.
5. Take off the flat tire.
4. Remove all of the
wheel nuts.
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