Heater heating but not correctly

[kardez]

I had a new waterpump and thermostat installed in my 05 Yukon XL and since then the heater does not heat up blazing hot. I am about 90% sure that the heater hoses are crossed at the heater core from what I can see in diagrams I have looked at online. I'm looking for confirmation on what the inlets and outlets are on the waterpump and heater core to confirm what the right flow direction is. Thanks