GM Service Manual Online
For 1990-2009 cars only

Headlamps

The headlamps will turn on when the headlamp switch is placed in the ON position.

When the low beam headlamps are on, the headlamps can be switched to the high beams by pulling the headlamp dimmer switch toward the driver until it clicks. When the headlamp dimmer switch is again pulled until it clicks, the headlamps will then switch to the low beams from the high beams.

Daytime Running Lamps

The Daytime Running Lamps (DRL) illuminate the high beam headlamps at a reduced intensity. The DRL will operate when the ignition switch is in the RUN or START position and the gear selector lever is out of the PARK position. DRL is a programmable feature for vehicles sold in the United States. Turning on the headlamps will disable the DRL system.

Flash-To-Pass

When the headlamp dimmer switch is pulled toward driver, but does not click, the high beam headlamps will light for as long as the switch is held. This will occur in any headlamp state (off, DRL, low beams).

Park Lamps

The park lamps will turn on when the headlamp switch is placed in the PARK or ON position.

Turn Lamps

The turn lamps can only be activated with the ignition switch in RUN or START. When the turn signal switch is placed in a position to indicate a left turn or a right turn, the respective turn lamps will flash. The respective turn indicator will flash on the Instrument Panel Cluster (IPC).

Hazard Lamps

When the hazard switch is pressed, all turn lamps will flash. Both turn indicators will flash on the Instrument Panel Cluster (IPC).

Stoplamps

When the brake pedal is pressed, all stop lamps light.

Backup Lamps

When the ignition switch is in RUN and the gear selector lever is in REVERSE, the backup lamps light.

Instrument Cluster Dimming

The instrument cluster lamps light when the park lamps are on. The brightness of the instrument cluster lamps is controlled by the instrument cluster dimmer switch located on the instrument panel.