Having problems with your 2004 Cadillac CTS ?
In what part of the vehicle is the air filter located at?
LOOK UNDER HOOD TO THE RIGHT ON DRIVER SIDE.YOU SEEN A BLACK PLASTIC BOX WITH A AIRDUCT WITH LARGE CLAMPS AROUND AIRDUCT GOING TO MASS AIR FLOW TO THROTTLE BODY.THE AIR FILTER IS INSIDE THE BLACK PLASTIC BOX.TO REMOVE AIR FILTER.FIRST YOU DISCONNECT MASS AIR FLOW SENSOR ELECTRICAL CONNECTOR..LOOSEN THE HOSE CLAMPS THAT SECURES THE AIR INTAKE DUCT TO THE THROTTLE BODY THEN LOOSEN REMOVE THE FASTNERS ON AIR FILTER COVER THEN LIFT REMOVE COVER AND REPLACE AIR FILTER THEN PUT EVERYTHING BACK VISA VERSA.
Repair Help & Product Troubleshooting for 2004 Cadillac CTS
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