If it's not leaking anti-freeze it's probably the resistor, if it is, heater core.
Can somebody post a note on where this is exaclty. It seems that all the older Aleros are having this problem. Mine's a 2000, and I want to know where it is before it goes, so I can fix it quick

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33% ALEROMOD OWNER!!
2000 Olds Alero 3400 SFI 14.53 @ 94.93
1985 Olds Delta 88 307 SBO 17.96 @ 76.99
2007 Volvo V50 T5 6M 15.782 @ 89.12
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