Passenger Compartment Air Filter for Cadillac CTS 2003

The passenger compartment air filter traps most of the pollen from the air entering your vehicle. Like your vehicle's engine air cleaner/filter, it needs to be changed periodically. For how often to change the passenger compartment air filter, see Part A: Scheduled Maintenance Services .

The passenger compartment air filter is located underneath the hood below the windshield wiper arm on the passenger's side of the vehicle. See Engine Compartment Overview for more information on location.

Use the procedure listed below to replace the passenger compartment air filter:

1. Turn the ignition to ON with the engine off.
2. Turn on the windshield wipers and turn them off again when the wipers are in the out-wipe position. The wipers will be straight up and down on the windshield.

This will allow you access to the leaf screen under which is located the passenger compartment air filter.

3. Open the hood to access the engine compartment. See Hood Release for more information.
4. Remove the four screws that hold the leaf screen in place and lift off the screen by lifting and sliding 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 upward.
7. Remove the old filter and insert a new one. Make sure the arrow on the filter is pointing toward the passenger compartment.

See Maintenance Replacement Parts for the correct part number for the filter.

8. Reverse Steps 1 through 6 to reinstall the cover.