GMC TopKick 2007 Owner's Manual page 56

Unless the passenger's airbag has been turned
off, never put a rear-facing child restraint in
this vehicle. 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 to turn off the
airbag before using a rear-facing child
restraint in the right front seat position.
56
CAUTION: (Continued)
CAUTION: (Continued)
Even though the airbag off switch is
designed to turn off the passenger's
airbag, 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.
We recommend that rear-facing child
restraints be secured in the rear seat,
even if the airbag is off.
If you need to secure a forward-facing child
restraint in the right front static seat or
right front bench 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.