GMC Canyon Owner's Manual page 81

If your vehicle has a roof-mounted side impact
airbag for the right front passenger and the person
seated directly behind that passenger, it is
located in the ceiling above the side windows.
CAUTION:
{
If something is between an occupant
and an airbag, the bag might not inflate
properly or it might force the object into
that person causing severe injury or even
death. The path of an inflating airbag
must be kept clear. Do not put anything
between an occupant and an airbag, and
do not attach or put anything on the
steering wheel hub or on or near any
other airbag covering. If your vehicle
has side impact airbags, never secure
anything to the roof of your vehicle by
routing the rope or tie down through any
door or window opening. If you do, the
path of an inflating side impact airbag
will be blocked. The path of an inflating
airbag must be kept clear.
81