2007 Chevrolet Impala Owner's Manual - Page 198

AUTOMATIC LIGHT CONTROL OFF This message displays when the automatic headlamps are turned off. See Exterior Lamps on page 158 for more information. Turn off all unnecessary accessories to allow the battery to recharge. The normal battery voltage range is 11.5 to 15.5 volts. AUTOMATIC LIGHT CONTROL ON This message displays when the automatic headlamps are turned on. See Exterior Lamps on page 158 for more information. CHANGE ENGINE OIL SOON This message displays when service is required for the vehicle. See your dealer. See Engine Oil on page 312 and Scheduled Maintenance on page 410 for more information. Acknowledging the CHANGE ENGINE OIL SOON message will not reset the OIL LIFE REMAINING. That must be done at the OIL LIFE screen under the vehicle information menu. See "Oil Life" under DIC Operation and Displays on page 189 and Engine Oil Life System on page 316. BATTERY SAVER ACTIVE This message displays when the system detects that the battery voltage is dropping beyond a reasonable level. The battery saver system starts reducing certain features of the vehicle that you may be able to notice. At the point that the features are disabled, this message is displayed. It means that the vehicle is trying to save the charge in the battery. 198