1996 GMC Yukon Owner's Manual - Page 137

Rear Heater (Without Rear Air Conditioning) I f you have a rear heater (without rear air conditioning), the control switch is located on the instrument panel. Rear Air Conditioning and Rear Heater I f your vehicle has the rear air conditioningand rear heater system combination, controlsare provided to regulate temperature, location and speed of the airflow. To increase and decrease the flow of heated air to the rear floor vents, move the switch marked REAR HEAT to the blower speed you want. The knob has three speed positions. To increase the flow of heated air, move the switch toward HIGH. To decrease the flow of heated air, move it toward LOW. To turn the fan off, move the switch to OFF. To adjust the air temperature, turn the temperature knob on the right of the control panel. For warmer air, turn the knob clockwise toward the red, and for cooler air, turn the knob counterclockwise. 3-5