Pontiac 1993 Firebird Owner's Manual page 13

Se'ats & Safety Belts
The two buttons that have "dots" inflate
and deflate the outer parts of the seatback.
To inflate, push the raised button. To
deflate, push the indented button.
The two buttons without "dots" inflate
and deflate the lumbar (lower part of the
seatback) support. To inflate, push the
raised button. To deflate, push the
indented button.
Reclining Front
Seatbacks
To adjust the seatback, lift the lever on the
outer side of the seat. Release the lever to
lock the seatback where you want it. Pull
up on the lever, and the seat
will
go to its
original upright position. But don't have
the seatback reclined if your vehicle is
moving.