Chevrolet 2009 Express Owner's Manual page 329

Rear Alternative Position (Diesel Vehicles)
4. Position the jack under the vehicle as shown.
The front position jacking point is on the frame. The
rear position jacking point is on the rear axle.
If the exhaust system interferes in the jack location
in the rear axle, such as in Diesel vehicles, place
the jack (A) on the rear axle between the axle
housing and the shock absorber bracket in order to
avoid any interference with the exhaust pipe (B).
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.
5. Raise the vehicle by turning the wheel wrench
clockwise. Raise the vehicle far enough off the
ground so there is enough room for the spare tire
to fit.
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