Chevrolet Avalanche Owner's Manual page 61

If your vehicle has one, the right front passenger's side
impact airbag is in the side of the passenger's
seatback closest to the door.
CAUTION:
{
If something is between an occupant and an
airbag, the airbag 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. Do not let seat covers block the
inflation path of a side impact airbag.
1-55