my check engine light came on, my speedometer stopped working?

Just to add to this one if the gas gauge and speedometer both stopped working at the same time and there arent any codes sounds like a bad body control module.They have a high failure rate on those vues i have replaced a lot of them on those vues.When the fuel level sensor fails on those vues it usually sets a code P0463 fuel level sensor.Do the power door locks keyless entry etc work?

I don't have power windows, door locks, or keyless entry. Everything's manually operated.

Did the speedometer and gas gauge stop working at the same time?Also does the temp gauge interior lights etc ever stop working?Does the gas or speedometer ever start working?

Yes, the speedometer and gas gauge stopped working at the same time. All of the other gauges are still working including the interior lights. I've seen the gas gauge move a little bit, but never moving up to where it registers any level. I have not driven it for 3 months because of the speedometer and I'm afraid to drive not knowing how fast I'm going as well as my fuel levels.

Your going to have to have it diagnosed for a bad body control module.It sounds like a bad body control module but it has to be diagnosed to be sure.

Thank you so much. Should I have it diagnosed at a Saturn dealer, or can I have it diagnosed elsewhere?

There are no more saturn dealers they closed the last ones in oct of 2010.You could try a chevy dealer or a good independent repair shop.But your best bet would be a dealer to diagnose it.

Thank you for the information. I will take your advice and go to a Chevy dealer for diagnosis.

Your welcome please keep me posted on what you find.