2007 Pontiac Grand Prix Owner's Manual - Page 203

This message displays while the ignition is in RUN. A chime sounds for two seconds when this message is displayed. Press the set/reset button to acknowledge this message and to clear it from the screen. This message continues to display if it has not been acknowledged when the engine is turned off. It also re-displays for three seconds if the message has been acknowledged, but the condition still exists when the engine is turned off. If the condition still exists, the message re-appears when the engine is turned on. This message displays while the ignition is in RUN. A chime sounds for two seconds when this message is displayed and then the message continues to display. Press the set/reset button to acknowledge this message and to clear it from the screen. This message continues to display for three seconds if it has not been acknowledged when the engine is turned off. It also re-displays for three seconds if the message has been acknowledged, but the condition still exists when the engine is turned off. If the condition still exists, the message re-appears when the engine is turned on. CHECK GAS CAP This message displays when the fuel cap is not on, or is not fully tightened. Check the fuel cap to ensure it is on and properly tightened. The diagnostic system can determine if the fuel cap has been left off or improperly installed. A loose or missing fuel cap allows fuel to evaporate into the atmosphere. A few driving trips with the cap properly installed should turn this message off. See Filling the Tank on page 342 for more information. 203