2011 Chevrolet Aveo Owner's Manual - Page 54

3-4 Seats and Restraints Lumbar Adjustment Manual Lumbar Reclining Seatbacks { WARNING You can lose control of the vehicle if you try to adjust a manual driver 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. To recline a manual seatback: 1. Lift the lever. 2. Move the seatback to the desired position, and then release the lever to lock the seatback in place. 3. Push and pull on the seatback to make sure it is locked in place. Move the adjustment lever on the outboard side of the seatback up or down to one of three positions to increase or decrease the lumbar support. The highest position provides the most support and the lowest position provides the least support. { WARNING If either seatback is not locked, it could move forward in a sudden stop or crash. That could cause injury to the person sitting there. Always push and pull on the seatbacks to be sure they are locked.