2003 GTP won't start, lights dim

When I turn the ignition, the lights go dim. It tries to crank over but it seems like it doesn't have enough power. Could this be the battery? Also, the clock changes to 1:00, but the radio presets are still there. This has been going on for a few weeks. Now it won't start at all. Any ideas?

Yes, battery problem and always a good idea to get the charging system - alternator checked out just to be sure. If you still have the OEM AC Delco battery what does the indicator look like - color?

def. a battery problem.. had the same thing with my car.

Thanks guys! It was the battery. I replaced it and it started no problem. Also went to Autozone and had them test the alternator just to make sure. The alternator was fine so problem solved. Thanks!