GMC Chevrolet Tahoe 2003 Manual page 50

Rear Safety Belt Comfort Guides for
Children and Small Adults
Your vehicle may have this feature already. If it doesn't,
you can get it from any GM dealer.
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 available for each outside passenger
position in the rear seat. Here's how to install a
comfort guide and use the safety belt:
1. For the second row, remove the guide from its
storage clip on the trim panel near the side of
the seatback.
For the third row, remove the guide from its storage
clip on the side of the seatback
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2. Place the guide over the belt and insert the two
edges of the belt into the slots of the guide.