Low Coolant

It's been running hot and gave me a "low coolant" light. I'm going to add more coolant for now, and do a flush and fill when I get more time. Anything special I need to know about doing it? How do I tell how full it is?

Thanks. :)

I'd find the leak first, do a pressure test and see what's what. Why drain the coolant 2x.

I'd find the leak first, do a pressure test and see what's what. Why drain the coolant 2x.

It's a VERY small leak... adding is very temporary, I'll do a flush soon.