I have a 2001 Blazer. I had a problem overheating so I replaced the radiator. The next day I notice water in the floor board on the driver side. I thought the heater core was on the passenger side but I removed all the water lines anyway to test. Ran fine for about a week or so, then one day I was running about 45 and smoke started comming out of the ac vents. I pulled off the road. popped the hood to look around , but didnt see anything crazy. When I got back in the truck, the floor was full of water again. I have no idea where this is coming from. I would not think it was the heater core since I disconected the hoses going there.

Any clues wherer to start looking?


Thanks

 

Have you checked the a/c drain?

 

I would check the HVAC drain as well, especially if it was raining or had been raining outside. Water could have gotten into the HVAC system and not drained out the bottom.

The drain is located at the lowest point of the HVAC housing on the engine side of the firewall, about directly above the frame rail.

 

Where is that? how do I get to it?
I did smell antifreeze when it happened.