If you go to the dodge website for the spec on your vehicle it will tell you or look in your manual under towing it will tell you.
From what I read the grand caravan SE and SE G model can only tow 1800 pounnds but the grand caravan SXT can tow 3800 pounds
http://www.dodge.com/hostc/vsmc/vehicleSpecModels.do?modelYearCode=CUD 200905
