Sure, you could probably get to it if you wanted to hack the carpet. I might have tried that if I didn't have wet carpeting.
Since my carpet was soaked I wanted to pull out it anyway. That requires the seats and console to come out. Really not that big of a deal, just take your time and don't break stuff.
I figured I had to look at my sunroof drain connections in the kick-panel area, something had to be leaking for the carpets to be so wet. That repair is a whole lot easier with the seats out of the way, relatively, it'* still a pain in the arse
. See all the details here http://www.gmforum.com/t250619
Both of my front tubes were disconnected. I even took the headliner down and checked everything around the sunroof, also easier without seats.
I put the driver seat back in so I can drive the car to work while I decide what I'm going to do about the carpet. Here is a picture with the seat all the way forward and raised up. Should be easy to slit the carpet and splice in a new section of wire. The offending connector is in the area circled in the picture.