2008 GMC Acadia Owner's Manual - Page 162

Battery Run-Down Protection This vehicle has a feature to help prevent the battery from being drained, if the interior courtesy lamps, reading/map lamps, visor vanity lamps or trunk lamp are accidentally left on. If any of these lamps are left on, they will automatically turn off after 10 minutes, if the ignition is off. The lamps will not come back on again until one of the following occurs: Head-Up Display (HUD) {CAUTION: If the HUD image is too bright or too high in your field of view, it may take you more time to see things you need to see when it is dark outside. Be sure to keep the HUD image dim and placed low in your field of view. If the vehicle has the Head-Up Display (HUD), some information concerning the operation of the vehicle is projected onto the windshield. This includes the speedometer reading, RPM reading, transmission position, outside air temperature, the tap shift gear, and a brief display of the current radio station, including XM information or CD track. It will also display turn-by-turn navigation information if the vehicle has a navigation radio. The images are projected by the HUD lens located on the driver's side of the instrument panel. The tap shift gear will also appear on the HUD if the vehicle has tap shift and it is active. • The ignition is turned on. • The exterior lamps control is turned off, then on again. The headlamps will timeout after 10 minutes, if they are manually turned on before the ignition is off. 3-20