Just changed water pump on 03 Durango and after driving about 100 miles check gauge light came on and water temp started to rise?

Sorry to hear about your issue. You will need to start with the basics again. Verify there is no coolant leaking. Verify the engine fan is working as well. It's very possible you have a seperate issue. If you want a second opinion here is a link to find a shop near you. https://repairpal.com/repair-shops Alex