Removing The Spare Tire And Tools - GMC 2007 Envoy Denali Owner's Manual

When your vehicle has a flat tire, use the following
example as a guide to assist you in the placement
of wheel blocks.
The following information will tell you how to use
the jack and change a tire.
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Removing the Spare Tire and Tools

The jacking equipment needed to remove the
spare tire is stored under the rear seat. To release
the jack from its holder, turn the knob on the
jack counterclockwise to lower the jack head.
See Rear Seat Operation on page 18 for more
information.