GMC 2007 Envoy - Manual (Page 479)

{ CAUTION:
The underbody-mounted spare tire needs
to be stored with the valve stem pointing
up. If the spare tire is stored with the
valve stem pointing downward, its
secondary latch will not work properly
and the spare tire could loosen and
suddenly fall from your vehicle. If this
happened when your vehicle was being
driven, the tire might contact a person or
another vehicle, causing injury and, of
course, damage to itself as well. Be sure
the underbody-mounted spare tire is
stored with its valve stem pointing up.
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.
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