1999 GMC Jimmy Owner's Manual - Page 154

yellowblue Comfort Controls With this system, you can control the heating, cooling and ventilation in your vehicle. Temperature Knob The middle knob on the control panel lets you select the relative temperature of the air flowing into the passenger area of your vehicle. Move the knob clockwise toward the red area for warmer air. Move the knob counterclockwise toward the blue area for cooler air. Mode Knob The right knob on the control panel allows you to choose the direction of air delivery. OFF: This setting turns the system off. Some outside air will still enter the vehicle whenever the vehicle is moving forward. MAX A/C: This setting provides maximum cooling with the least amount of work. MAX A/C recirculates much of the air inside your vehicle so it cools quickly. This setting directs most of the air through the instrument panel vents and a small amount through the floor vents. A/C: This setting cools the air entering your vehicle and directs most of the air through the instrument panel vents and a small amount through the floor vents. Standard Climate Control System Fan Control The knob on the left side of the heating system control panel controls the fan speed. To increase airflow, move the knob clockwise. To decrease airflow, move it counterclockwise. 3-2