Chevrolet 2009 HHR Owner's Manual page 16

To raise the rear seatback(s):
CAUTION:
{
A safety belt that is improperly routed, not properly
attached, or twisted will not provide the protection
needed in a crash. The person wearing the belt
could be seriously injured. After raising the rear
1-12
CAUTION: (Continued)
CAUTION: (Continued)
seatback, always check to be sure that the
safety belts are properly routed and attached, and
are not twisted.
6. Lift the seatback up and push rearward until you
hear a click. Keep the safety belt clear of the seat
and not twisted.
The release knob on the top of the seatback has a
red ring. If the seatback is not fully latched this
ring will be visible. Push on the seatback until the
ring is not visible.
CAUTION:
{
If the seatback is not locked, it could move forward
in a sudden stop or crash. That could cause injury
to the person sitting there. Always pull forward on
the top of the seatback at the area of the latch to be
sure it is locked.
7. Push and pull on the seatback to make sure it is
locked in place.