This question is begging to come out....
How low IS your idle? Numbers can tell us alot of things. Anything below 500 rpm things start to go awry.
Since you have an SSEi, you have no battery gauge on your dash. Do you have access to a DMM (digital multi-meter)? Standing voltage at the battery should be anywhere from 12.4-12.0. A battery under charge (engine running) should be at 14.4 volts if all is healthy. Note that there will be a small voltage drop from the alternator to the battery...usually less than .5 volts.
Amperage coming from the alternator should also be looked at. Easiest way to test that is to have the car tested at your local autoparts store.
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.