Chevrolet 2006 HHR Owner's Manual page 156

If your vehicle has a rear seat that will accommodate a
rear-facing child restraint, a label on your sun visor
says, "Never put a rear-facing child seat in the front."
This is because the risk to the rear-facing child is
so great, if the airbag deploys.
CAUTION:
{
Even though the passenger sensing system is
designed to turn off the passenger's frontal
airbag if the system detects a rear-facing child
restraint, no system is failsafe, 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.
3-30
If your vehicle does not have a rear seat that will
accommodate a rear-facing child restraint, never put a
child in a rear-facing child restraint in the right front
passenger seat the unless passenger airbag status
indicator shows off. Never put a rear facing child
restraint in the right front passenger seat unless the
airbag is off. Here is why:
CAUTION:
{
Even though the passenger sensing system is
designed to turn off the passenger's frontal
airbag if the system detects a rear-facing child
restraint, 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.