Pontiac 2004 Bonneville - Manual (Page 9)

To adjust the power seats, do the following:
Horizontal Control: Raise or lower the front of the seat
cushion by pressing the forward edge of the control
up or down.
Raise or lower the rear of the seat cushion by pressing
the rear edge of the control up or down.
Move the seat forward or rearward by pressing the
control toward the front or rear of the vehicle.
Move the seat higher or lower by holding the whole
control up or down.
Vertical Control (Option): Adjust the angle of the
seatback by pressing the top of the control forward or
rearward.
Manual Lumbar
The knob that controls this feature is located on the
outboard side of each front seat. Turn the knob toward
the front of the vehicle to increase lumbar support.
Turn the knob toward the rear of the vehicle to decrease
lumbar support.
If you have the independent front cushion moved down
as far as it will go, you may feel the lumbar support
higher in your back. Readjust the location of the cushion
until you are comfortable. You may also want to
adjust the seatback for maximum comfort.
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