Water leaking onto floor mats

You need to find the drain hose for the evaporator core and make sure it is no blocked or disconnected. You might be able to see it under the dash just over the passenger foot well. Or under the hood at the firewall on the passenger side. You may be able to sort of clean it out with a piece of "weed-eater" line.

2004 chevy venture, Water leaking into car. tried to clean evap drain line with shop vaccum. Didn't work, Can i use air compressor and blow air into tube