1998 GMC Jimmy Owner's Manual - Page 15

Raise the rearof the seat by raising the rear edge of the button. Lower the rear of the seat by lowering the rear edge of the button. Move the seat rearward by moving the whole button toward the rear of the vehicle. Moving the whole button up or down raises or lowers the whole seat. Power Lumbar Control (If Equipped) If you have this control, itis located on the sideof the driver's seat. Vertical Control: Move thereclining front seatback rearward by moving the button toward the rear of the vehicle. Move the seatback forward by moving the button toward the front of the vehicle. Press and hold the front of the control until you have the desired lumbar support. To decrease lumbar support, press and hold the rear of the control.