To find it, you'll likely need to:
* Consult your Escalade's repair manual: This is the best resource for a precise location specific to your model year.
* Search online forums: Websites and forums dedicated to Cadillac Escalades (like Cadillac forums or enthusiast sites) often have discussions and pictures showing the location of the evaporator drain. Searching for "[your Escalade year] evaporator drain location" should yield results.
* Look carefully underneath the vehicle: Be mindful of hot surfaces, and use caution when working under the car. The hose is usually connected to the HVAC system's evaporator core.
Warning: Accessing and working on the evaporator drain often requires some mechanical knowledge. If you're not comfortable working under your car, it's best to take it to a qualified mechanic.