Hello,
I feel your pain.
I buy a new truck every winter for my business and currently have a 2014 Chev Silverado 1500 4x4 double cab with 3,700 miles. Here are my observations for taking care of new Chev trucks;
1. Clay entire vehicle and wax once a year with Meguiers cleaning wax. This must be done immediately once new as the truck WILL have rail dust that will convert to real rust if left unchecked.
2. Every car wash MUST include some detailing. In the summer it is a full detail, in the winter it is a partial as it is cold.
3. I MUST attend to both bumpers after EVERY car wash as they show rust spots after each wash in the winter.
4. Wash the truck once every 2-3 weeks in the winter. This is a full service wash where the wash includes a wipe down to get off the film.
If you do all this, things will go well. If you don't things ill rust. By the way, the rail dust seems to come back even if you keep up with it and the dealer says it is the rail shipping companies fault not theirs.
I keep buying Chevs though, Frank