2011 Chevrolet Tahoe Owner's Manual - Page 209

Lighting If the vehicle is not equipped with DIC buttons, exit lighting is automatic. When it is dark enough outside, the exterior lamps remain on for 30 seconds after the ignition is moved from ON/RUN to LOCK/OFF. For vehicles without a radio, the instrument panel light remains on for 30 seconds with the driver door closed. For vehicles with a radio, the instrument panel light remains on for 10 minutes with the driver door closed. See Retained Accessory Power (RAP) on page 9‑34. The regular headlamp system can be turned on when needed. 6-5 Hazard Warning Flashers Turn and Lane-Change Signals | (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. An arrow on the instrument panel cluster flashes in the direction of the turn or lane change. Move the lever all the way up or down to signal a turn.