2004 GMC Envoy Owner's Manual - Page 136

Exterior Lamps Your exterior lamps knob is located on your instrument panel to the left of the steering wheel. • Taillamps • License Plate Lamps • Instrument Panel Lights 2(Headlamps): Turn the knob to this symbol to turn on all the lamps listed as well as the headlamps. Automatic Headlamp System When it is dark enough outside, your Automatic Headlamp System will turn on your headlamps at the normal brightness along with other lamps such as the taillamps, sidemarker, parking lamps and the instrument panel lights. The radio lights will also be on. c(Off): Turn the knob to this symbol and release it to turn off the Daytime Running Lamps (DRL) and the automatic headlamps. An indicator will illuminate when the position is selected. This position is not available for vehicles first sold in Canada. i (Automatic DRL/AHS): Turning the knob to this symbol puts the system into automatic headlamp mode. An indicator will illuminate when the position is selected. ; (Parking Lamps): Turn the knob to this symbol to manually turn on the following: • Parking Lamps • Sidemarker Lamps 3-16 Your vehicle is equipped with a light sensor on the top of the instrument panel. Be sure it is not covered or the system will be on whenever the ignition is on. The system may also turn on your lights when driving through a parking garage, heavy overcast weather or a tunnel. This is normal. There is a delay in the transition between the daytime and nighttime operation of the Daytime Running Lamps (DRL) and the automatic headlamp systems, so that driving under bridges or bright overhead street lights does not affect the system. The DRL and automatic headlamp system will only be affected when the light sensor sees a change in lighting lasting longer than the delay.