Chevrolet 1999 Cavalier Owner's Manual page 11

If your vehicle is not equipped with easy entry seats,
your passenger seat adjuster looks like this. Slide the
lever under the passenger's seat to the right to unlock it.
Slide the seat to where you want it. Then release the
lever and try to move the seat with your body, to make
sure the seat is locked into place.
If your vehicle is equipped with easy entry seats, this is
your front passenger seat adjuster. Pull up on the lever at
the front of the passenger's seat up to unlock it. Slide the
seat to a comfortable position. Then release the lever
and try to move the seat with your body, to make sure
the seat is locked into place.
Manual Lumbar Support (If Equipped)
The manual lumbar support control is located at the
front of the driver's seat, toward the right. Turn the knob
clockwise or counterclockwise to increase or decrease
the amount of support to your lower back.
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