I tow a crew cab silverado with my listed motor home. Don't think a 35 foot gas coach is rated to tow that much weight. I've had 3, 35 foot gas class A's.All had 5000 pound rated hitches, but the silverado is heavier. One can weigh it to make sure, but once you get all the "extras", bigger engine, 4x4 chassis etc added up I'm pretty sure you are over. A friend weighed his 2003 at just Under 5400 pounds.
Howard,Connie,& Bella,
One spoiled schnauzer
2007 Newmar KSDP
4dr Jeep Wrangler