GM Service Manual Online
For 1990-2009 cars only

This feature lets you use your high-beam headlamps to signal a driver in front of you that you want to pass, even if the headlamps and ignition are turned off.

To use it, pull the turn signal/multifunction lever toward you until the high-beam headlamps come on, then release the lever to turn them off.

If flash-to-pass is activated, then the headlamp high/low-beam changer indicator will display on the instrument panel cluster. The fog lamps are turned off while this feature is active.