Hello all. I have a 1998 Silverado that's leaking coolant. I have replaced the water pumpm and just replaced the lower intake manifold gasket last weekend. To me it looks like it is leaking down the back of the engine. It leaves two silver dollar sized puddles on the drive way after i get done driving it. The weird thing is after we replaced the water pump it was still leaking so we did the intake gasket, and after that the leak had stopped but now it's back. Any suggestions would be great. Thank you!

 

Maybe a freeze plug?

 

I would check the hoses that run from water pump into the heater core at the fire wall. Mine leaked from there and the symptoms you give me sound the exact same

 

Do you have a pressure tester? If so pressureize it and see where it leaks from....if not you should be able to rent one from your local autoparts store.