My 2001 Saturn 300 is displaying the service engine soon light.

oil should be changed every 5,000 miles

YES CHANGE THE OIL AND FILTER SOON OR YOU MAY HAVE TO CHANGE YOUR ENGINE

diagnostic test should give you a clue to what is happening

ban news working on my wifes car let the garage sort it be cause every time it breaks its your fault becase you repaired it last lol you know how they are lol

The service engine light is usually a flag for an oil change or other maintenance item. If it is reset, it will come back on in 5000 miles as a reminder to change the oil. Ask your dealer's service department how to reset the indicator and do it when you change your oil. I know for Saturn, the proceedure is Turn the key to the on position without starting the engine and within 5 seconds press the accelerator pedal all the way to the floor 3 times. Not sure if it will be the same for the Pontiac, but you could give it a try.

The change oil light needs to be reset after each oil change...some shops are not knowledgeable on how to do this...Your owners manual will instruct you how to reset the oil change light...The service engine soon is a catch all for low fluids and other needs...Be sure to check your oil level again...to clear the service engine soon light, you can disconnect either battery cable for 15 minutes then reconnect...if the service engine stays on...then you need to have your Grand Am checked...Auto Zone does a free diagnostic of check engine light codes...:)

Your vehicle's engine requires oil meeting GM Standard GM6094M. You should look for and use only an oil that meets GM Standard GM6094M. SAE 5W-30 is best for your vehicle.
The best Brand is 5W-30, Mobile 1 synthetic oil, but you can use Castrol GTX 5W-30, too. It is very important to use only one barand of engine oil.
When the CHANGE ENGINE OIL SOON message in the Driver Information Center (DIC) comes on,
means that an oil change service is required for your vehicle.
If the engine oil life system is ever reset accidentally, you must service an oil change for your vehicle within 3,000 miles (5 000 km), or three months wichever comes first, since your last service.
The maintenace tune ups for this car are scheduled at 25K, 50K, 75K, 100K and so on.
Dealer recomend to change the transmission oil and filter at Maintenace II, at 50K, and the air filter too. Use only DEXRON®-VI Automatic Transmission Fluid.
The dealer sugest to flush the radiator every 75K and use 50/50 mixture with distilled water, and use only DEX-COOL. I recommend to flush every 50K.

This is probably related to "oil change". You should be able to hit reset on your instrument cluster, it is designed to probably come on every 3000 miles after you hit the reset...
did you just buy this car?
Change your oil and hit reset

did you unhook the battery to reset the code???

mostly your thermostat . how is your engine heat ?

Under the hood, next to the battery, is a fuse box. Lift the lid (instructions are on the lid) and with the keyswitch on but the engine not running, press and hold the button that says "oil". The book says 5 seconds, but hold it for about 10. If someone is watching the dash lights while you do that, the change oil light should flash briefly.