2002 GMC Sonoma Owner's Manual - Page 13

Heated Front Seats (If Equipped) If your vehicle has this feature, the controls are located on the outboard side of the front seats. Reclining Seatbacks If your vehicle is equipped with power seats, see "Power Seats" earlier in this section for information on reclining the seatback. To adjust a manual front seatback, lift the lever on the outboard side of the seat. This feature will quickly heat the seat cushion and lower back of the driver's and front passenger's seats for added comfort. Press the lower part of the control to turn the heater on low. Press the upper part of the control to turn the heater on high. Move the control to the center position to turn the heater off. The passenger's safety belt must be engaged for the heated seat feature to work on the passenger's seat. Release the lever to lock the seatback where you want it. Pull up on the lever without pushing on the seatback and the seat will go to an upright position. 1-6