2014 Cruze- Came home from work and the fan was really really loud and when the car was shut off the fan didn't stop running for about 3 to 4 mins. Had the water pump replaced already. Still smelling antifreeze, took it in but they couldn't find a leak anywhere. Please help!!

 

The fan will run for a few minutes after the car is shut off if the engine needs to be cooled down. Sounds like you may an issue with the fan since it was very loud. I would have the fan checked for proper operation. maybe it is not cooling the engine like it should.