That sounds exactly like a clogged A/C drain, super common!
So to address that, you'd want to get under the truck on the passenger side, right behind the front wheel.
Look for a small rubber hose, maybe half an inch in diameter, poking out from the firewall. Sometimes it's hard to see, but it's there.
I've had good luck just using a small wire, like a coat hanger, to gently poke up into the hose and break up the clog.
Be careful not to shove it too far though.
Once you get it clear, a bunch of water should come out.
You can also try a blast of compressed air, but be gentle with that too!
