2017 equinox. The Transmission cooler line leaks at the radiator connection. Upper driver's side. When I look up the line at parts stores it appears there is no o ring on that connection. The c-clip type connector is in place, but the line is loose in the radiator. Should there be an o-ring on that connection or would an o-ring fix the problem?

 

Reviewed Rockauto - they list a fluid line, a clip and a line seal for sale.

 

Yes. I found that the connection to the radiator has 2 o rings in it, and auto parts stores sell the connection.