GMC 2005 Safari Owner's Manual page 17

CAUTION:
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A seat that is not locked into place properly
can move around in a collision or sudden stop.
People in the vehicle could be injured. Be sure
to lock the seat into place properly when
installing it.
3. To raise the seatback, do the following:
3.1. Unlock the seatback latch by pulling up on
the latch release lever at the right rear of the
seat, while pushing down on the upper
edge of the seatback.
3.2. Move the seatback into the upright position.
Make sure the seatback is locked when it is
back in the upright position.
4. If you are replacing the center seat, connect the
right lap-shoulder belt to the attachment on the
seat cushion. If you have a safety belt guide on your
seat, pull the belt through the guide before
reattaching the lap-shoulder belt to the side of the
seat. The release hole should be facing outward.
5. If you installed the safety belt with the release hole
facing inward (toward the seat), slide the plastic
cover up so you can see the buckle. Disconnect the
seat belt. Slide the cover back down and reinstall
the belt correctly.
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 seatback, always check
to be sure that the safety belts are properly
routed and attached, and are not twisted.
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