Chevrolet 2006 Silverado 1500 Pickup Owner's Manual page 502

2. Use the wheel wrench and turn it counterclockwise
to loosen the wheel nuts. Do not remove the wheel
nuts yet.
5-100
Jacking Locations
A. Front Location (Two-Wheel-Drive 1500 Series)
B. Front Location (All Other Series)
C. Rear Location (All Series)
3. Position the jack under the vehicle as shown. If the
flat tire is on the front of the vehicle (two-wheel-drive
1500 Series 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.
If you have added a snow plow to the front of your
vehicle, lower the snow plow fully before raising
the vehicle.