Chevrolet 2009 Avalanche Owner's Manual page 464

Be sure the hoist end (F) of the extension connects
to the hoist shaft (E). The ribbed square end of
the extension is used to lower the spare tire.
Do not use the chiseled end of the wheel wrench.
5. Turn the wheel wrench 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 on
page 5-92 for more information.
5-84
4. Insert the open end of
the extension (F)
through the hole in the
rear bumper (G) (hoist
shaft access hole).
6. Use the wheel wrench
hook that allows you to
pull the hoist cable
towards you, to assist
in reaching the
spare tire.