Pontiac 1999 Firebird - Manual (Page 21)

yellow blue
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Driver Position
This part describes the driver’s restraint system.
Lap-Shoulder Belt
The driver has a lap - shoulder belt. Here’s how to wear
it properly.
1. Close and lock the door.
2. Adjust the seat (to see how, see “Seats” in the Index)
so you can sit up straight.
3. Pick up the latch plate and pull the belt across you.
Don’t let it get twisted.
On convertible models, the shoulder belt may lock if
you pull the belt across you very quickly. If this
happens, let the belt go back slightly to unlock it.
Then pull the belt across you more slowly.
4. Push the latch plate into the buckle until it clicks.