Chevrolet TRACKER 2003 Manual page 10

Manual Lumbar
Reclining Seatbacks
If your vehicle has this feature, turn the knob located on
the driver's side seatback clockwise or counterclockwise
to adjust support of the lower back.
To adjust the seatback, lift the lever on the outboard
side of the seat cushion. 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.
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