Yeah, but your also not lifting the whole weight...you are lifting what is over the jacking point. I don't know if the door jam sticker has it, but look at the weight rating per axle as the weight isn't evenly distributed front to back. That is what you are going to lift.
Could it work with a 2 ton jack? Maybe, but your on your own if there is a problem.
There are some 2 &1/2 ton floor jacks out there that aren't too expensive.
I use a 4 ton bottle jack and two 3 ton jack stands and they work very well with the Traverse. I know that doesn't answer your question at all, but I'm stating it because when I bought them (at Harbor Freight) there was very little difference in price from what I bought and the next step up or down. So, if you already have a 2 ton jack, I guess this post still doesn't help you. However, if you are looking to purchase, my advise would be just get something that will lift / support at least 2.5 tons. It will only cost you a few more dollars and will give you peace of mind.
I have a set of 6 Ton jack stands I use on my Silverado sure a little over kill but very stable. The thing with jack stands is they will be supporting all the weight if you have the entire vehicle up in the air so you want to get a set with a wide bottom that are not flimsy because al it takes is one to give way and you are in trouble. I would go with a set of 2 ½ tons to fill safe. The problem with using the 6 Tons like I have is the higher the tonnage normal the jack stand is taller so you have to jack it up higher then you need to.