Why post in "General "Performance? Do you know your engine type? That narrows things down a bit when we know what engine out of the 3 that the Alero comes with.
You don't have a carburetor. It's a throttle body.
Either throttle position sensor, idle air control motor/valve, or you have a vacuum leak. You should be able to get it scanned by a local auto parts store and see if there's any DTC (diagnostic trouble codes) that may or may not be causing any of your dash warning lights to come on.
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