2010 Cadillac CTS Owner's Manual - Page 239

Climate Controls To replace the passenger compartment air filter: 1. Turn the ignition to ON/RUN with the engine off. 2. Turn on the windshield wipers and turn the ignition off again when the wipers are straight up on the windshield. This allows access to the leaf screen. The passenger compartment air filter is located under the screen. 3. Open the hood to access the engine compartment. See Hood on page 9‑5 for more information. 7-7 4. Remove the three screws that hold the screen in place and lift off the screen by lifting and sliding it toward the center of the vehicle. 5. Pull out on the two tabs located on each end of the filter cover. 6. Lift the filter cover off by pulling it straight up. 7. Remove the old filter and insert a new one. See Maintenance Replacement Parts on page 10‑9 for the correct part number for the filter. 8. Reverse Steps 1 through 6 to reinstall the cover. The passenger compartment air filter is located under the hood below the windshield wiper arm and the screen on the passenger side of the vehicle. See Engine Compartment Overview on page 9‑6 for more information on location.