Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hi Rob, I am Cam. Can I get your first name?
I am sorry to hear about this issue. Can you tell me if the water seems to accumulate when raining or more when using AC?
To your answers, 1, it should drain down the sides into the door jamb area and to the floor. Looking at the gm manuals, I do see a bulletin (information only) regrading this. Its attached in a printed document and shows where to clean and seal. 2, there is drain and its location is in the picture also attached. 3, you will still need to remove the screen to get the debris out that has fallen in.
Have a look at the information and reply if you have any questions about this.
If I may, I would not proceed until we confirm the water stops with it sealed shut. Perhaps you need to make it rain, spraying water on the vehicle. No it should not drain water through plenum through the AC drain, that is only for water accumulated from the core itself. The drains in the corners will be concealed to prevent debris from getting back up from the other way. Let me do some looking at a 2011 when I get one in the shop.