glad you got it fixed. $310 ain't too bad. $700 is two car payments for me and is pricey. I would have probably loaded up on the 22N wiper blades and put them on low speed for a few months until I could have figured it out.
But I'm used to looking like a dork in my Intrigue. My flasher acted up for almost a year before I fixed it (I had to keep toggle-ing my hazards to work) and my wipers were on for at least a year before I could diagnose and fix the bent park tab.
I saw your topic at:
http://www.oldsmobileforums.com/forums/
also before I saw it here. I like that forum better for posting etc.