GMC 2007 Sierra 1500 Pickup Owner's Manual page 56

Never put a rear facing child restraint in the right
front passenger seat unless the airbag is off.
Here is why:
CAUTION:
{
A child in a rear-facing child restraint can
be seriously injured or killed if the right
front passenger's airbag inflates. This is
because the back of the rear-facing child
restraint would be very close to the
inflating airbag. Be sure the airbag is off
before using a rear-facing child restraint
in the right front seat position.
56
CAUTION: (Continued)
CAUTION: (Continued)
Even though the passenger sensing
system or airbag off switch are designed
to turn off the passenger's frontal airbag
under certain conditions, no system is
fail-safe, and no one can guarantee that
an airbag will not deploy under some
unusual circumstance, even though it is
turned off. General Motors recommends
that rear-facing child restraints be
transported in vehicles with a rear seat
that will accommodate a rear-facing child
restraint, whenever possible.
If you need to secure a forward-facing
child restraint in the right front seat,
always move the front passenger seat as
far back as it will go. It is better to secure
the child restraint in a rear seat.