According to page 10-77 of the owner's manual
, the 2013 Volt may be towed on a dolly, but not four-down.
The fact that it's not listed in the 2013 Motorhome Magazine Dinghy Guide
would seem to confirm the Volt is not certified by the manufacturer as towable four-down.
One Web page places the curb weight of the 2013 Volt at 3,781 pounds. You'll want to add the weight of the dolly, and then check the total against the weight and tongue weight limits of your 1996 Suncruiser. Some pre-2000 coaches have hitches limited to 3,500 pounds with 350 pounds of tongue weight.