Pontiac 2002 Firebird - Manual (Page 26)

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To unlatch the belt, just push the button on the buckle.
The belt should go back out of the way.
Before you close the door, be sure the belt is out of the
way. If you slam the door on it, you can damage both
the belt and your vehicle.
Safety Belt Use During Pregnancy
Safety belts work for everyone, including pregnant
women. Like all occupants, they are more likely to
be seriously injured if they don’t wear safety belts.
A pregnant woman should wear a lap - shoulder belt,
and the lap portion should be worn as low as possible,
below the rounding, throughout the pregnancy.