The 2021 GMC Acadia has two air filters: an engine air filter located in the engine compartment and a cabin air filter located behind the glove box on the passenger side. This article explains where to find each filter and how to replace them.
Engine air filter location
Identify the engine air filter housing in the engine bay. It’s a rectangular plastic box that sits toward the front of the engine on the passenger side, secured with clips or screws.
To replace it, follow these steps:
- Open the hood and locate the engine air filter housing, typically on the passenger side of the engine bay.
- Release the clips or screws securing the lid and lift it to expose the filter.
- Remove the old filter, noting the correct orientation (the filter has an airflow arrow on one side).
- Insert the new filter with the arrow pointing in the direction of airflow, reseat the lid, and reattach the clips or screws.
- Close the hood and run the engine briefly to ensure there are no leaks or misfits.
Regular replacement is important for performance and efficiency. Check the owner's manual for your car's exact interval, but a common guideline is about every 30,000 miles under normal driving, more often in dusty or harsh conditions.
Cabin air filter location
The cabin air filter on the 2021 Acadia is located behind the glove box on the passenger side. Access typically requires lowering or removing the glove box to reach the filter housing.
To replace it, follow these steps:
- Open the glove box and empty its contents.
- Gently press in the sides of the glove box to release the dampers or hinge stops, allowing the box to drop down or fold down, exposing the cabin filter cover behind it.
- Open the filter access door and remove the old filter, noting the correct orientation.
- Insert the new filter, ensuring the arrows point in the correct direction, and reseal the cover.
- Raise the glove box back into place and reattach any stops or dampers.
Cabin filter replacement timing depends on usage and environment; many owners replace it every 12–24 months or 15,000–22,500 miles, especially if you drive in dusty areas or have allergies.
Summary
In short, the 2021 GMC Acadia uses two accessible filters: an engine air filter in the engine bay on the passenger side and a cabin air filter behind the glove box on the same side. Both are replaceable with a few basic tools and without specialized equipment; consult the owner’s manual for the exact intervals and any model-specific steps.