My wifes equinox with 96k miles on it just started making this awful whine sound. It does not get louder or seem to change with rpm. I immediately thought it was the tensioner pulley cause thats where it seems to come from but now im not sure. I cannot get home to remove the belt and see if it still makes the sound until monday. I really dont want it to be a water pump sound. It dont run hot or leak anything. And the actual motor has no knocks or rattles. I made a video but it wont let me upload it. Says its to long at only 10 seconds. Its a whine from the passenger side.