The blower on my 92 Seville wouldn't turn off, even with no key in ignition. Checked all the relays and fuses - they were ok. Read about the blower control module in this forum, figured it was that. Did a little research at www.acdelco.com, got their part number for the car. Several internet parts companies have blower controls. Got the ac delco part from www.expressautoparts.com for a lot less than $150. Four Seasons also makes replacement controls. Took about 15 minutes to change after finding all my little metric wrenches. I sure am glad this site is here, the two local dealers never heard of this happening, and the local auto parts store couldn't find the part in their books.