Chevrolet 1997 Blazer Owner's Manual page 38

To unlatch the belt, just push the button on the buckle.
Rear Safety Belt Comfort Guides
for Children and Small Adults
(4-DOOr Models)
Four-door models have rear shoulder belt comfort
guides. This feature will provide added safety belt
comfort for children who have outgrown child restraints
and for small adults. When installed on a shoulder belt,
the comfort guide pulls the belt away from the neck
and head.
There is one guide for each outside passenger position in
the rear seat. To provide added safety belt comfort for
children who have outgrown child restraints and for
smaller adults, the comfort guides may be installed on
the shoulder belts. Here's how to install a comfort guide
and use the safety belt:
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