Cadillac deville 1999 ユーザーズマニュアル

The engine air cleaner/filter is located next to the
windshield washer fluid reservoir on the driver’s side of
the engine. Be sure the engine has cooled before
following these steps to replace the air cleaner filter:

1. Disconnect the Intake

Air Temperature (IAT)
sensor from the base of
the air cleaner.

2. With a screwdriver,

loosen the air duct
clamp, which is located
at the mass airflow
sensor end of the 
air duct.

3. Disconnect the air duct from the mass airflow sensor.