2003 grand am 4 door automatic,everything works, lights, radio, windows,buzzes when key is in ignition. I hear nice noise, if it was the battery all the other things in the car would not work.
What kind of problem would this be?
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Keep in mind that you can have a low battery and not be able to crank the engine, but still have enough to run some of the interior electrical parts like the one you mentioned. The fact that it's only been an hour since the car last ran makes the soft battery a likely candidate.
The key (as mentioned in the comments) is whether the engine is cranking or not. If it cranks then there is some other problem, but if not, it's likely one of the following:
- Soft battery (Most likely)
- Bad solenoid
- Bad ground in the starting system
- Intermittent starter connection
- Bad starter
If the problem is a soft battery, and nothing electrical was left on during that hour, you might have a bad alternator that's not charging the battery well. The easy way to tell if it's the battery or not is to measure the voltage across it with everything turned off. To be really sure nothing is pulling current from it, disconnect the negative and then the positive battery leads. Now measure the voltage across it. If it's below 12 volts DC, this is your likely problem. Here's a chart of battery voltage as an indicator of charge state: