how much weight inside the van?

I cannot tell you the gross vehicle weight rating as it is not listed in my resource materials. But I can tell you two things: First, the towing capacity of your van is 3,500 pounds, which indicates a level of carrying capacity. Second, on a lable in your drivers door jam, you should have some information - one bit is the "GVWR" which stands for gross vehicle weight rating. This will tell you the total weight possible for the vehicle to handle. Take this number and subtract about 4,400 pounds, which is the empty vehicle weight. This should be the basic vehicle capacity.