GMC 2010 Canyon Crew Cab Owner's Manual page 365

Rear Position
If the flat tire is on the rear, position the jack under
the rear axle and get as close as possible to the
shock absorber.
5. Make sure the jack head is positioned so that the
rear axle is resting securely between the grooves
that are on the jack head.
6. Turn the wheel wrench clockwise to raise the
vehicle. Raise the vehicle far enough off the ground
so there is enough room for the spare tire to fit
under the wheel well.
7. Remove all the wheel
nuts and the flat tire.
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