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First impression is a MAP sensor. If you take the car to a service station or an auto parts store that features free diagnostic tests, I'm sure the MAP sensor fault will appear. Other cause could be the TPS which controls the idle at cold,warm, and AC operation settings. It's possible that you're stalling due to insufficient idle speed setting on the TPS.
Could be an idle air control problem, or possible vacuum booster trouble, have also seen the baffle broken in the GM tanks and when you brake hard the engine dies. Fill the tank and try it, if it doesn't do it the baffle is bad.
fuel filter , vacuum leaks are common also.... but if your battery light is on ..even when not idling low .. the system is not seeing the right voltage..have you tested with a volt/ohm meter..dvom...and see 14.7 volts to battery when idling?... connections, especially grounds to/from battery etc...?...advise