2003 Cadillac Seville Owner's Manual - Page 270

? . Loosen the air duct clamp, which is located at the mass airflow sensor end of the air duct. 2. Disconnect the air duct from the mass airflow sensor. The engine air cleaner/filter is located next to the coolant surge tank on the driver's side of the vehicle. See Engine Compartment Overview on page 5-14 for more information on location. Be sure the engine has cooled before following these steps to inspect or replace the engine air cleanedfilter: 5-21