Where is the cabin air filter in a 2003 Cadillac Escalade?

In a 2003 Cadillac Escalade, the cabin air filter is located behind the glove compartment. To access it, you need to open the glove compartment, remove any contents, and then unclip or detach the glove compartment door to allow it to drop down further. The filter is housed in a compartment that can be opened to replace the filter.