Here's a general guide. Always consult your owner's manual for the most accurate instructions specific to your vehicle. The manual will have diagrams and specifics that are better than a general guide.
Common Method (Under Glove Compartment):
1. Gather your tools: You'll likely only need a flat-head screwdriver or possibly a small panel removal tool (to avoid scratching). Have your new cabin air filter ready.
2. Access the glove compartment: Fully open the glove compartment.
3. Remove the glove compartment: There are usually one or more screws or clips holding the glove compartment in place. These are often located on the top edge or sides of the glove compartment. Carefully remove these fasteners. You might need to gently pull down on the glove compartment after removing the fasteners to fully detach it. Some models have a release lever or latch.
4. Locate the cabin air filter housing: Once the glove compartment is out of the way, you should see a rectangular or slightly oblong housing for the cabin air filter. It's usually located behind the glove compartment area, sometimes with a cover.
5. Remove the filter cover: There might be a simple latch or clip holding the filter cover in place. Remove this to access the filter itself.
6. Remove the old filter: The old filter should slide out relatively easily. Inspect its condition. If it's very dirty or clogged, you'll notice the difference immediately.
7. Install the new filter: Carefully slide the new filter into the housing, ensuring that it's correctly oriented (usually, there's an arrow or markings indicating the airflow direction).
8. Reassemble: Replace the filter cover, reattach the glove compartment, and secure it with the screws or clips.
If you cannot find the filter under the glove compartment:
* Check behind the center console: Some Impalas might have the cabin air filter located behind the center console. This often requires removing some trim panels, so extra caution is warranted.
* Consult your owner's manual: This is the most reliable source of information for your specific vehicle.
Important Considerations:
* Take pictures: Before disassembling anything, take pictures so you know how everything goes back together.
* Work in a well-lit area: This will make it easier to see the fasteners and the filter housing.
* Be gentle: Avoid using excessive force when removing or installing parts.
If you're uncomfortable performing this task yourself, it's best to take your Impala to a qualified mechanic. The cost of professional replacement is usually minimal.