Oxidation in the socket? Or does the Alero use the *spit hack* circuit boards that GM stuck the Malibu and Cutlass with? If the latter, triple check ALL connections, and then throw the old boards away and buy new ones ...
If just a socket, then a good spritz of something like DeoxIt (cleaner and conditioner available at Radio Shacks, $15 for a small sprayer of both on one card), let the socket oxidation dissolve properly, treat it, and remember to use some good dielectric grease on it.
If THAT doesn't help it, time to hunt up to the front where the multi function switch is and see if that's where the problem is.
RwP
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