1999 GMC Safari Owner's Manual - Page 9

yellowblue Manual Lumbar Support (If Equipped) Power Seats (If Equipped) If you have this feature, there will be a control pad on the inboard side of the driver and passenger bucket seats. If you have this feature, there will be a knob on the inboard side of the driver and passenger bucket seats. 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. The front control makes the front of the seat go up and down. The center control makes the whole seat go forward, rearward, up or down. The rear control makes the rear of the seat go up and down. 1-3