GM Service Manual Online
For 1990-2009 cars only

Object Number: 918770  Size: B2

The lever on the left side of the steering column operates the exterior lamps.

The exterior lamp switch has the following four positions:

& (Headlamps): Turns on the headlamps, parking lamps, and taillamps.

(Parking Lamps): Turns on the parking lamps and taillamps only.

AUTO (Automatic Headlamp System): Automatically turns on the Daytime Running Lamps during daytime, and the headlamps, parking lamps, and taillamps at night.

(Off/On): This position is the momentary Off/On switch for the Automatic Headlamp System. In Canada, this only works when the vehicles with an automatic transmission are in P (Park) and vehicles with a manual transmission have the parking brake set and the vehicle is not moving.

When operating in AUTO, a momentary turn of the switch to off/on will turn off the Automatic Headlamp System. An AUTO LIGHTS OFF message displays on the Driver Information Center (DIC) and a chime will sound. Turning the switch to off/on again will turn the Automatic Headlamp System back on. An AUTO LIGHTS ON message displays on the DIC. The Automatic Headlamp System is always turned on at the beginning of an ignition cycle for vehicles with manual transmission.