GMC 2009 Yukon XL Owner's Manual page 485

1. Open the hoist shaft access door (C) on the
bumper to access the spare tire lock (K).
2. To remove the spare tire lock, insert the ignition
key, turn it clockwise and then pull it straight out.
3. Assemble the two jack handle extensions (D) and
wheel wrench (E) as shown.
Be sure the hoist end (J) of the extension (D)
connects to the hoist shaft (B). The ribbed square
end of the extension is used to lower the spare tire.
5. Turn the wheel wrench (E) counterclockwise to lower
the spare tire (H) to the ground. Continue to turn the
wheel wrench until the spare tire can be pulled out
from under the vehicle.
If the spare tire does not lower to the ground, the
secondary latch is engaged causing the tire not to
lower. See Secondary Latch System on page 5-98
for more information.
4. Insert the open end
of the extension (J)
through the hole in the
rear bumper (I) (hoist
shaft access hole).
5-89