Why is my Cadillac escalade overheating

Overheating can happen for multiple reasons. One reason can be an engine thermostat that does not open and close when needed. Also, if work has been done on then cooling system, it' possible that there is an air pocket in the system that will need to be purged. Do the engine cooling fans work? They should always turn on with the air conditioning system working, but also when engine temperature reaches a certain high point. Hands on inspection is needed to figure out what is going on. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops