CHEVROLET 2010 HHR - Manual (Page 379)

WARNING: (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 even more certain the vehicle will not move,
you should 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 you in the placement
of wheel blocks (A). A. Wheel Block
B. Flat Tire
The following information explains how to use the jack
and change a tire.
6-85