Mechanic special,
I think the head gasket needs to be replaced. When I took it to Celebration Chevrolet They told me I needed new injectors and heater hose coupler. I don't believe that's the issue. The Escalade has 281k miles but the engine only has 35k. Celebration is the shop that did the engine swap three and a half years ago. I wanted them to do this work under the warranty but they refused.
Before the coolant leak I had all the fluids changed
-Transmission
-Front/Rear Differential
-Transfercase
-Engine oil
-Brake fluid
The interior is in fantastic shape and I had the QUE system replaced because the stock one failed, the tires are in good shape they probably have 45k miles left on them. Overall the car has been very well maintained and will be a good ride for anyone who is capable of getting it up to snuff.