wet passenger floor!!!

Soaked with water?

Or soaked with coolant?

 

as stated above.
You should be able to smell coolant especially if the car has been running. It will be slippery too.
If it's coolant then it heater core. If it's water then it's probably the door or windshield leaking. Pray it's not the heater core.

If you just got the car then I bet the PO knew about the leak.

 

Your sunroof maybe. I heard aftermarket suinroofs are known to leak or maybe a weather strip. Mine also leaks from the back where the back passenger sits but its a convertible

Sent from my LG-D851

 

Most cars don't have sunroofs.

There was a problem with the cowl leaking, but I think that usually soaks the drivers side. Get over there and sniff your floor board, you'll be able to tell if its coolant or just plain water.

 

Trace it down, if it's just water then cowl, windshield, door/glass, or a possible rust hole in the floor. Coolant, heater core.

 

A/C drip tube could be clogged.

 

Gotta be a leaking heater core.

 

Check your coolant reservoir and see if they put normal water in the system. Id bet they did and its a leaking heater core.

 

This. Not sure how common it is in our cars but GM constantly has this issue.

 

Odd... Where do you live? Have you been using the AC? Has it been raining a good bit? I know you said it was sprinkling.

 

I had a leak on my old 2007 Leuxs GS. Turns out it was the tank that is suppose to collect the condensation from AC evap. If it's leaking when AC is on as others have stated could be clogged drip tube or cracked tank.

 

What you could do is find an A/C foam cleaner.

Shoot it into the drip tube, let it sit for a while and then run your A/C. Usually it's a 2step system, one can for the driptube and one can for the cowl vents after the foam cleaner has run its course.