Chevrolet 2012 Colorado Owner's Manual page 325

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.
Raising the 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.
4. Position the jack under the
vehicle, as shown, for the front
or rear locations.
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.