Chevrolet 2007 TrailBlazer Owner's Manua page 489

Notice: An aluminum wheel with a flat tire
should always be stored under the vehicle with
the hoist. However, storing it that way for an
extended period could damage the wheel.
To avoid this, always stow the wheel properly
with the valve stem pointing up and have
the wheel repaired as soon as possible.
Follow this diagram to store the
underbody-mounted flat or spare tire.
A. Wheel Wrench
B. Hoist Shaft
C. Extension
D. Retainer
E. Spare or Flat Tire
(Valve Stem
Pointed Up)
1. Put the tire (E) on the ground at the rear of
the vehicle.
2. Remove the hubcap, if the vehicle has one,
from the flat tire by tapping the backside of
the hubcap with the wheel wrench (A). Store in
a safe location until the flat tire is repaired.
Once the tire is repaired, replace the hubcap.
3. Make sure the valve stem is pointed up and
to the rear.
4. Pull the retainer (D) through the wheel.
5. Put the socket end of the extension (C)
through the hole just above the rear bumper at
a 45 degree angle downward. Connect the
socket end of the extension to the hoist
shaft (B).
6. Raise the tire fully against the underside of
the vehicle. Continue turning the wheel
wrench (A) clockwise until you hear two clicks
or feel it skip twice. This indicates that the
tire is secure and the cable is tight. The spare
tire hoist cannot be overtightened.
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