While underneath my 2000 Blazer, I noticed that the rubber vent at the bottom of the bellhousing has a leak of water that is ATF colored. The radiator is constantly low on coolant and as I refill it continues to leak. What should I be checking for?

 

Do a search on lower intake manifold gaskets..... it sounds like u are suffering from the notorious bad intake manifold gasket failure!????

 

Could it possibly be a freeze plug in the rear of the block?

 

I had a similar problem with coolant at the bottom of my block, and it was coolant from the intake gaskets. Do a pressure test on the cooling system to locate the leak.

 

Thank you.