Mishimtoto makes an oil cooler relocation.
https://www.mishimoto.com/chevrolet-...2010-2015.html
Or you can delete it for much cheaper.
https://www.improvedracing.com/2012-...dgVglSCtGd9zyi
The actual oil cooler itself doesn't leak. There's little O rings that seal the cooler to the block. Mine is leaking currently but I'm going to tackle that next oil change. Its been leaking since I've cammed my car over a year ago and could never track it down until recently.
You need 4 of these GM 12613165 and 1 of these GM 15203889. Rockauto appears to have these in stock.
Here's a good video.
https://youtu.be/aPKtu9RrEjw?si=-ur1ABvgg183-j7k
Me personally, I'll never delete it because my turbos are oil cooled so I need the oil cooler. I also can't use the Mishimtoto because the cooler mounts where my intercooler mounts. The necessity really beats me. I would keep it even if my car was stock.