I heave heard either 3550 or 3600#. I have being meaning to wieght mine, but haven't gotten around to it. My local track used to put the scale on during street nights, so I used to weight all my cars, but they seemingly stoped doing since I have own my Sy.
Mine was weighed straight from the gas station with a full tank only had to drive 1/2 mile to the scales. Seems like a big range for these trucks. Mine was stock from the factory at time of weigh in. No driver.