Chevrolet Silverado Classic 2007 Owner's Manual page 576

2. Use the wheel wrench and turn it
counterclockwise to loosen the wheel nuts. Do
not remove the wheel nuts yet.
576
Jacking Locations
A. Front Location (Two-Wheel-Drive 1500 Model)
B. Front Location (All Other Models)
C. Rear Location (All Models)
3. Position the jack under the vehicle as shown.
If the flat tire is on the front of the vehicle
(two-wheel-drive 1500 Model vehicles),
position the jack under the bracket attached to
the vehicle's frame, behind the flat tire. If
the flat tire is on the front of the vehicle (all
other models), position the jack on the frame
behind the flat tire.
If the flat tire is on the rear, position the jack
under the rear axle between the spring anchor
and the shock absorber bracket.