Rear Safety Belt Comfort Guides For Children And Small Adults - GMC 2005 Sierra Denali Owner's Manual

The safety belt also locks if you pull the belt very
quickly out of the retractor.
CAUTION:
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You can be seriously hurt if your shoulder belt
is too loose. In a crash, you would move
forward too much, which could increase injury.
The shoulder belt should fit against your body.
To unlatch the belt, just push the button on the buckle.
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Rear Safety Belt Comfort Guides for
Children and Small Adults
Rear seat 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.
There is one guide for each outside passenger in the rear
seat. Here is how to install a comfort guide and use the
safety belt:
1. Remove the guide from its storage clip on the
interior body.