Chevrolet 2004 Avalanche Owner's Manual page 33

Rear Safety Belt Comfort Guides for
Children and Small Adults
Rear shoulder belt comfort guides will 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.
There is one guide for each passenger position in the
rear seat. Here is how to install a comfort guide and use
the safety belt:
1. Remove the guide from the storage clip on the side
of the rear seatback.
1-27