where does the fluid go on the radiator tank( aka surge tank, pass left whl well

What is your question?

I'm losing coolant from the tank on the passenger wheel well. For a year a dealership can't seem to locate the issue. I have 93350 on a 2012 volt. I recently had the oil changed and I noticed that the protection cover is now wet with an oil residue and a water dye from a test done by the dealership at the same time the oil was to be changed. My car has been also throwing diagnostic codes for a check engine (misfiring ) an engine not detected and propulsion reduced.

What makes this problem better or worse?

driving on ICE vs Electric mode

How long has your 2012 Chevrolet Volt had this problem?

1 year