Buick/Olds: Buick blender door actuator, salvage yard, o reillys

Question
Hi Paul. I'm looking for a blender door actuator for my parents 93 LeSabre. Has that problem with the flow sticking in the defrost and floor positions (comes back to vent flow after a while). Any ideas where can find one? Been searching on the web to no avail.  Also, how often would you do a tuneup on this car?  Thanks, Steve

Answer
Hi Steve,
Actually, just try AutoZone and O'Reillys...or a salvage yard... otherwise it's a dealer item.
A full tuneup, including spark plugs is recommended every 100,000 miles. Meantime,check and change the passenger compartment air filter every 15,000 miles, and engine air filter the same mileage, as needed.