2006 Pontiac Grand Prix Owner's Manual - Page 193

CHECK GAS CAP This warning message comes on when the gas cap is not on, or is not fully tightened. Check the gas 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 will allow 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 5-7 for more information. This message will display while the ignition is in RUN. A chime will sound 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 will continue to display for three seconds if it has not been acknowledged when the engine is turned off. It will also re-display 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 will re-appear when the engine is turned on. CHECK TIRE PRESSURE This symbol comes on with the CHECK TIRE PRESSURE warning message. If the vehicle has ABS brakes, this warning message will appear when the air pressure in one of the tires is too low or too high. Check the vehicle's tire pressure as soon as possible, and fill or deflate the affected tire to the appropriate level. The correct tire inflation pressure should be set to those shown on the tire-loading information label on the vehicle. See Loading Your Vehicle on page 4-33 for more information. The CHECK TIRE PRESSURE screen is reset when it is acknowledged. However, the TIRE INFLATION MONITOR SYSTEM screen, located under the option menu in the DIC, must also be reset. See "Tire Inflation Monitor System" in the options section under DIC Controls and Displays (Base Level DIC) on page 3-52 or DIC Controls and Displays (Uplevel DIC with Trip Computer) on page 3-60 for more information. 3-75