1999 GMC Yukon Owner's Manual - Page 9

yellowblue Power Seat(s) (If Equipped) raise the rear of the seat, move the rear lever up. To lower the rear of the seat, move the rear lever down. The switch located at the front of this control panel is for the power lumbar adjustment, which is explained next. Power Lumbar Adjustment (If Equipped) If you have power lumbar adjustment, you can increase or decrease lumbar support in an area of the lower seatback. If your vehicle has a power seat on the driver's or passenger's side, you can adjust it with these controls at the outside edge of the seat. The switch is located on the side of the seat, next to the door. You can use the round center knob to move the seat to where you want it. To raise the seat, move the knob up. To lower the seat, move the knob down. To move the seat forward, move the knob toward the front of the vehicle. To move the seat rearward, move the knob toward the rear of the vehicle. You can also raise and lower the front and rear of the seat. To raise the front of the seat, move the front lever up. To lower the front of the seat, move the front lever down. To To increase support, press and hold the front of the rocker switch. Let go of the switch when the lower seatback reaches the desired level of support. To decrease support, press and hold the rear of the rocker switch. Let go of the switch when the lower seatback reaches the desired level of support. 1-3