Control Assembly Description: Controls
WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The heater control head in the instrument panel contains the following controls:
- A blower speed control knob
- A desired operation selection knob
- An air temperature control knob
These controls illuminate when the headlamps are ON. The instrument panel lighting circuit provides the voltage. The dimmer control of the headlamp switch controls the brightness of the dial illumination.