To be certain, it's best to:
* Consult your owner's manual: This is the most reliable source for the specific location of components in your vehicle.
* Use a repair manual: A Haynes or Chilton manual will have diagrams showing the location of the compressor and other components.
* Search online for your specific year and model: Pictures and forum discussions from other Escalade owners can be helpful.
Be aware that the compressor itself might not be immediately obvious; you might have to look closely among hoses and other engine bay components. It often has several air lines connected to it.