Chevrolet 1998 Camaro Owner's Manual page 49

On convertible models, the safety belt also locks if you
pull the belt very quickly out of the retractor.
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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