1998 GMC Jimmy Owner's Manual - Page 16

Heated Front Seats Equipped) (If ...' 6.. Reclining Front Seatbacks If you have this feature, the control is located on the side of the seat. This feature will quickly heat the lower cushion and lower back of the driver and front passenger seats for added comfort. Press the lower part of the switch to turn the heateron low. Press the upper part of the switch toturn the heater on high. Put the switch in the center position to turn the heater off. To adjust the seatback, lift the lever on the outer sideof the seat. Release the lever to lock the seatback where you want it. Pull up on the lever and the seat will go to an upright position.