GMC Safari 2003 Owner's Manual page 78

If you've had a crash, do you need new belts or LATCH
system parts?
After a very minor collision, nothing may be necessary.
But if the belts were stretched, as they would be if
worn during a more sever crash, the you need new
parts.
If belts are cut or damaged, replace them. Collision
damage also may mean you will need to have LATCH
system, safety belt or seat parts repaired or replaced.
New parts and repairs may be necessary even if the belt
or LATCH system wasn't being used at the time of
the collision.
1-72
If your seat adjuster won't work after a crash, the
special part of the safety belt that goes through the seat
to the adjuster may need to be replaced.
If an air bag inflates, you'll need to replace air bag
system parts. See the part on the air bag system earlier
in this section.