Anti-freeze leak in 97 Pontiac Montana?

[CHRISTINE B]

It's coming from underneath from a flat metal rectangle object with a grid pattern on it, I'm not sure what this is but what should I do or where should I start? Is this something I could fix myself or do I have to take it in?

 

[Robert e. L]

put a pressure test on the coolant system and look where it is coming from

 

[Jason E]

That would most likely be your radiator. There's products out there to stop small leaks. Or ive even heard stories of cracking a raw egg into the radiator. I wouldnt try it myself, but hey its cheap lol.

 

[ryankneale]

The 2 biggest culprits on that engine is the water pump and the intake manifold gasket. Take it to a shop and have it pressure tested to see what the actual cause is and go from there.