You need two figures to determine GVWR, just add these two.
The axle weight RATING, which you have and the pin weight RATING, which you do not know, but need to know for the correct GVW. The dealer probably doesn't have the correct number and it is not shown on the sticker as a specific value. 1953 lbs. just sounds strange to me, although it may be the pin rating.
Pin weight and pin rating are different animals.
Best thing is to weigh the tow vehicle and then get the trailer hooked up and weigh the whole combo, The difference being the weight of the trailer. While you're on