2012 Buick Enclave Owner's Manual - Page 58

3-4 Seats and Restraints Power Lumbar Lumbar Adjustment Manual Lumbar Reclining Seatbacks Power Reclining Seatbacks { WARNING You can lose control of the vehicle if you try to adjust the seat while the vehicle is moving. The sudden movement could startle and confuse you, or make you push a pedal when you do not want to. Adjust the driver seat only when the vehicle is not moving. If available, move the handle forward or rearward to increase or decrease lumbar support. If available, press and hold the front or rear of control to increase or decrease lumbar support. Release the control when the seatback reaches the desired level of lumbar support.