Chevrolet 2000 Tahoe Owner's Manual page 16

Manual Cushion Tilt (If Equipped)
If your vehicle has this feature, you can raise or lower
the front of the driver's or passenger's seat with this
lever located at the inside edge of the seat. To raise or
lower the front of the seat, move the lever up or down
in a continuous motion until the cushion reaches the
desired height.
Manual Lumbar Control (If Equipped)
To increase support, turn the knob towards the front of
the vehicle. Operating effort can be reduced if you lean
forward slightly while turning the knob.
To decrease support, turn the knob towards the rear of
the vehicle.
If your vehicle has a
lumbar adjustment, you
can increase or decrease
lumbar support in an area
of the lower seatback.
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