GMC 2004 Yokon Denali Owner's Manual page 395

1. If your vehicle is equipped with a hoist lock (J),
open the spare tire lock cover on the bumper
and use the ignition key to remove the lock.
2. Assemble the wheel wrench (H) and the two jack
handle extensions (I) as shown.
Be sure the hoist end of the extension connects
into the hoist shaft (E). The ribbed square end
of the extension is used to lower the spare tire.
4. Turn the wheel wrench (H) counterclockwise to
lower the spare tire 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" later in this
section.
3. Insert the hoist end
(open end) (F) of the
extension through
the hole (G) in the
rear bumper.
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