Chevrolet EXPRESS - 2011 Manual page 347

Changing a tire can be
dangerous. The vehicle can
slip off the jack and roll over or
fall on you or other people.
You and they could be badly
injured or even killed. Find a level
place to change the tire. To help
prevent the vehicle from moving:
1. Set the parking brake firmly.
2. Put an automatic
transmission shift lever in
P (Park), or shift a manual
transmission to 1 (First) or
R (Reverse).
(Continued)
3. Turn off the engine and do
not restart while the vehicle
is raised.
4. Do not allow passengers to
remain in the vehicle.
To be certain the vehicle will not
move, put blocks at the front and
rear of the tire farthest away from
the one being changed. That
would be the tire on the other
side, at the opposite end of
the vehicle.
When the vehicle has a flat tire (B),
use the following example as a
guide to assist in the placement of
wheel blocks (A).
A. Wheel Block
B. Flat Tire
The following information explains
how to repair or change a tire.