We bought a short bed truck to pull our 40 ft Sanibel, based on the advice of the Chevy dealer and our RV dealer. According to the manual, the tongue weight is not supposed to exceed 3,000 lbs and the total gross vehicle weight is not supposed to exceed 10,000 lbs. Are these numbers correct? What are the consequences of continuing to drive the rig? Is there anything that can be done to modify the truck to increase its capacity or do we just need to get a one ton Dually?