Chevrolet 2004 Astro Owner's Manual page 38

Rear Safety Belt Comfort Guides for
Children and Small Adults
Rear safety belt comfort guides provide added safety
belt comfort for older children who have outgrown
booster seats and for small adults. When installed on a
shoulder belt, the comfort guide better positions the
belt away from the neck and head.
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Here is how to install a comfort guide and use the
safety belt:
1. Remove the guide from its storage clip on the side
of the seatback.