Read the owners manual for the Silverador, under recreational or towing behind a MH, if it says no, question answered.
I would believe NADA that the actual weight of the Silverado is over 5000lbs, our 4cyl CRV weighs over 3500lbs, no way the truck is only 4000lbs.
If it is towable 4 down, with or without modifications, I would be more worried about the handling and braking of the MH, than the MHs engine and transmission. One unplanned emergency maneuver or braking event.?? nobody every cuts off or pulls out in front of a MH.
Ken
2006 Winnebago Outlook 29B E-450.
2012 Honda CR-V AWD
Blue Ox Aventa LX tow bar and Brake Buddy Vantage.