Chevrolet 2009 TrailBlazer Owner's Manual page 404

Front Position
A. Front Frame/
Rear Axle
B. Jack
6. Place the jack in the appropriate position nearest
the flat tire.
5-98
Rear Position
C. Handle
D. Extension(s)
E. Wheel Wrench
CAUTION:
{
Getting under a vehicle when it is jacked up is
dangerous. If the vehicle slips off the jack, you
could be badly injured or killed. Never get under a
vehicle when it is supported only by a jack.
CAUTION:
{
Raising your vehicle with the jack improperly
positioned can damage the vehicle and even make
the vehicle fall. To help avoid personal injury and
vehicle damage, be sure to fit the jack lift head into
the proper location before raising the vehicle.