2004 Pontiac Grand Am Owner's Manual - Page 140

Oil Pressure Light If you have a low engine oil pressure problem, this light will stay on after you start your engine, or come on and you will hear a chime when you are driving. This indicates that your engine is not receiving enough oil. The engine could be low on oil, or could have some other oil problem. Have it fixed immediately. When the ignition is on but the engine is not running, the light will come on as a test to show you it is working, but the light will go out when the engine is running. If it doesn't come on with the ignition on, you may have a problem with the bulb. Have it fixed right away. {CAUTION: Do not keep driving if the oil pressure is low. If you do, your engine can become so hot that it catches fire. You or others could be burned. Check your oil as soon as possible and have your vehicle serviced. Notice: Lack of proper engine oil maintenance may damage the engine. The repairs would not be covered by your warranty. Always follow the maintenance schedule in this manual for changing engine oil. 3-34