2011 Chevrolet Avalanche Owner's Manual - Page 201

Lighting 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 is only affected when the light sensor sees a change in lighting lasting longer than the delay. If the vehicle is started in a dark garage, the automatic headlamp system comes on immediately. Once the vehicle leaves the garage, it takes approximately one minute for the automatic headlamp system to change to DRL if it is light outside. During that delay, the instrument panel cluster may not be as bright as usual. Make sure the instrument panel brightness control is in the full bright position. See Instrument Panel Illumination Control on page 6‑7. 6-5 Hazard Warning Flashers Turn and Lane-Change Signals An arrow on the instrument panel cluster flashes in the direction of the turn or lane change. Move the turn signal lever all the way up or down to signal a turn. | (Hazard Warning Flashers): Press this button located on top of the steering column, to make the front and rear turn signal lamps flash on and off. This warns others that you are having trouble. Press again to turn the flashers off. When the hazard warning flashers are on, the vehicle's turn signals will not work. Raise or lower the lever until the arrow starts to flash to signal a lane change. The turn signals automatically flash three times. It will flash six times if the tow-haul mode is active. Holding the turn signal lever for more than one second causes the turn signals to flash until the lever is released. The lever returns to its starting position when it is released.