So I have seen tons of posts about this but the solution is stumping me. I’ve tested for leaks on windshield, back brake light, rear window you name it! Never seen water get to passenger side with all the plastic footing pulled and carpet pulled up. No rain today, and drove about 15 miles away, let truck idle with AC on. Inspected AC drain line dripping condensation onto the parking lot steadily. Drove home and pulled floor mat and low and behold, under the mat there was moisture. The floor was extremely hot. Maybe that’s what’s causing it? I’m stumped. Been at this for a week.. anyone have any ideas….