Towing a chevy 1500 express on a tow dolly?

It is not just the width of the tires on the van, but also how much clearance inside of the tow dolly fenders to the bumper and fenders of the vehicle on the tow dolly. If you get a dolly wide enough to accommodate the van during any turns, you would still have to deal with the drive axle wheels on the ground while towing. You would probably have to deal with a drive shaft disconnect or drive shaft removal.

Ken

I don't know, but probably not. Dollies are really intended for front wheel drive cars that typically weigh less than 4000 lbs or so. Are you towing the van a long distance, and what are you towing it with? Just my opinion, but the only way to do it right is with a 10K GVWR flatbed trailer. Unless you are going a short distance I don't think a dolly will work very well.

are their tow dolly's besides Uhaul that the van can be towed w/?

A quick check of Uhauls website says that the max vehicle weight to go on their tow dolly is 3900 pounds. The front of the van alone will weigh close to that, grossly overloading the dolly.

Dolly plus van will weigh how much?

The Express is a rear wheel vehicle. You will need to disconnect the drive shaft before towing on a dolly with the front wheels on the dolly.