Do it yourself, change the air filter on your Chevy Impala. The procedure to make this replacement should be the same for many other vehicles made by GM. The tutorial below is valid for Impala models manufactured between the years 2000 and 2005.
On this particular car, the air filter is sealed inside an air box, on the driver’s side of the car, behind the headlight (see picture below).
Removing and replacing this filter should be an easy task. You can do it in less than 5 minutes, using only a flat blade screwdriver. You can start by unplugging the electrical connector shown in the image below, located on the intake hose. You will have to detach that hose eventually, so you also have to loosen the screw that secures the metal clamp. After you do it, remove the intake hose by pulling it up.
This will enable you to open the lid of the air box, so getting you access to the air filter. You can do that by releasing the metal clips marked with the red arrows below. After you pull out the filter, clean the air box for dirt and debris and work to install the replacement. Insert the new filter and secure it with the lid, reconnect the air intake hose (make sure the gaskets seal it, leaving no air leaks), plug back the connector and tighten the clamp.
Why is necessary to change the air filter on your car regularly? Because your engine consumes a lot of air in order to function, the air filter is an important part for your car. It cleans the air entering your engine, thus increasing its lifetime. By changing it regularly, your car will perform better, you will have better gas mileage and an improved acceleration.