2007 Buick Lucerne Q&A
2007 Buick Lucerne Question: There is a high pitched squeal in the heater/ac fan, what might it be?
That is most likely the case. the blower needs to be droped and cleaned out, normally 3-5 bolts hold the blower assembly in plus the plug and rubber elbow. The blower assembly is normally by the passanger floor bord on the bottom of the dash, however on your vehicle i think it might be in the engine conpartment aginst the firewall. Hope this helps - Collins Auto