Chevrolet VENTURE 2001 Manual page 82

11. Now fasten the left and right halves of the shoulder
harness clip together. The purpose of this clip
is to help keep the harness positioned on the
child's shoulders.
1-70
CAUTION:
An unfastened shoulder harness clip won't help
keep the harness in place on the child's shoulders.
If the harness isn't on the child's shoulders,
it won't be able to restrain the child's upper
body in a sudden stop or crash. The child could
be seriously injured. Make sure the harness clip
is properly fastened.