GMC 2004 Canyon - Manual (Page 345)

If the flat tire is on the front of the vehicle, position
the jack to the rear of the front tire in the pocket
off of the frame.
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.
{ 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.
Front Location
5-81