The cabin air filter is located behind the glove box on the passenger side, inside a rectangular housing. Access is gained by lowering the glove box and removing the cover, then replacing the filter with the arrows pointing toward the HVAC system.
In practice, you’ll typically find a single cabin air filter (some trim levels use an activated carbon version). The replacement process is straightforward but requires care not to damage the glove box damper or the filter housing. Have a new filter on hand that matches your trim and follow the steps carefully for a proper seal and airflow.
Location and access
To locate and replace the filter, follow these steps in sequence.
- Park safely, turn off the engine, and open the passenger-side glove box. Remove any contents to give you clear access.
- Gently squeeze the sides of the glove box or press the stops to release it, then lower the panel to expose the area behind the glove box.
- Look for the rectangular cabin air filter housing tucked behind the glove box. The housing is secured with clips; release the clips or lift the cover as instructed for your model.
- Remove the old filter from the housing. If present, check for a secondary filter or carbon insert that may be part of a combined unit.
- Note the airflow direction printed on the filter. Insert the new filter with the arrows facing toward the HVAC system (into the dash).
- Reattach the housing cover and secure the clips. Lift the glove box back into place, ensuring the damper (if equipped) engages properly.
- Close the glove box and, with the ignition off, briefly run the climate control on fresh air to verify that air is flowing freely and the system is drawing air through the new filter.
After completing the replacement, ensure everything is reassembled correctly and that you do not hear unusual rattling from the glove box area when driving.
Summary
In a 2018 Buick Enclave, the cabin air filter sits behind the passenger-side glove box in a rectangular housing. Access it by lowering the glove box, releasing the housing cover, and replacing the filter with the correct orientation. With the new filter installed, reassemble and test the climate control to confirm proper airflow.