2004 GMC Sonoma Owner's Manual - Page 110

Turn Signal/Multifunction Lever Turn and Lane-Change Signals The turn signal has two upward (for right) and two downward (for left) positions. These positions allow you to signal a turn or a lane change. To signal a turn, move the lever all the way up or down. When the turn is finished, the lever will return automatically. An arrow on the instrument panel cluster will flash in the direction of the turn or lane change. The lever on the left side of the steering column includes the following: Turn and Lane Change Signals Headlamp High/Low-Beam Changer Flash-to-Pass Feature Windshield Wipers Windshield Washer Cruise Control 3-6