GMC 2005 Canyon Owner's Manual page 72

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.
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CAUTION:
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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
tiedown 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.