Chevrolet 2011 Express 1500 Cargo Owner's Manual page 347

To help prevent the vehicle from
moving:
1. Set the parking brake firmly.
2. Put an automatic
transmission in P (Park) or a
manual transmission in
1 (First) or R (Reverse).
3. Turn off the engine and do
not restart while the vehicle
is raised.
4. Do not allow passengers to
remain in the vehicle.
5. Place wheel blocks on both
sides of the tire at the
opposite corner of the tire
being changed.
When the vehicle has a flat tire (B),
use the following example as a
guide to assist in the placement of
the wheel blocks (A).
A. Wheel Block
B. Flat Tire
The following information explains
how to repair or change a tire.
If you have a cargo van or a
passenger van, the equipment you
will need is located in the passenger
side rear corner of the vehicle.
Remove the retaining wing bolt and
lift it off of the mounting bracket.