To find it definitively, you'll likely need to:
* Consult your owner's manual: This is the best place to start. The manual should have a diagram showing the location of major components.
* Use an online parts diagram: Many auto parts websites (like AutoZone, Advance Auto Parts, etc.) offer online diagrams specific to the year and model. Search for your Escalade ESV and look for diagrams of the suspension or air suspension system.
* Visually inspect the underside of your vehicle: Once you have a general idea of where it might be, carefully look underneath your Escalade. The compressor is usually a relatively small, cylindrical unit with several air lines attached. Be aware of hot components and use caution when looking under the car.
Remember to be cautious when working under your vehicle and use jack stands for safety if you need to get underneath.