Oldsmobile 1999 Aurora - Manual (Page 254)

yellow blue
6-16
4. There’s a temperature sensor on the corner of the air
cleaner cover. Release the sensor’s electrical
connector retainer, and pull up.
5. Unsnap the two clamps by pushing down on the
top of the air cleaner cover and pushing in on the
clamps toward the center of the cover. Then remove
the cover.