GM Service Manual Online
For 1990-2009 cars only

Control Assembly Description C60


Object Number: 386284  Size: SF

With this system, you can control the heating, cooling and ventilation in your vehicle. The system works best if you keep your windows closed while using it.

Fan Knob

The left knob selects the amount of air you want. To turn the fan off, turn the knob to OFF. The fan must be on to run the air conditioning compressor.

Temperature Knob

The center knob changes the temperature of the air coming through the system. Turn this knob toward red (to the right) for warmer air. Turn it toward blue (to the left) for cooler air.

Mode Knob

The right knob has several settings to control the direction of airflow:

MAX: The setting recirculates most of the air inside the vehicle and directs the air through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 38°F(3.3°C).

UPPER: The setting brings in outside air and directs it through the instrument panel outlets.

BI-LEVEL: This setting brings in outside air and directs it two ways. Half of the air is directed through the instrument panel outlets. Most of the remaining air is directed through the floor ducts and a little to the defrost and side window vents.

FLOOR: This setting sends most of the air through the ducts near the floor. The remaining airflow come out of the defroster an side window vents.

DEFOG: This setting allows half of the air to go to the floor ducts and half to the defroster an side window vent. Some of the air goes to the floor ducts and the side window vent. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 38°F (3.3°C).

DEFROST: This setting directs most of the air through the defroster and side window vent. Some of air goes to the floor ducts. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 38°F (3.3°C).

Air Conditioning Compressor Button

Press the A/C button to operate the air conditioning compressor. The indicator light above the button will glow when the button is pressed. You do not have to press the button to run the compressor in MAX or DEFROST because it will already be running in these modes.