Keep the truck, one of the best made. I had an 03 DRW.
I won’t comment on the EB as it’s been covered.
The issues on that truck are as follows:
Front end components probably need attention at 160k miles.
Fuel injectors may need attention. Some last much longer.
48RE Trans is good but may need attention soon.
Lift pump was an issue, but at your mileage probably already addressed.
HVAC blend doors fail. Directs air from heater/AC
Other then that and normal wear items of any vehicle you have a very good reliable truck.
As someone mentioned, if you do trade or sell, that truck is worth more than book value.
Not sure what options, cab size, trim level or 4x4, but it should be worth low $20k - $30k.
I would keep it and fix any issues as they come up and enjoy your travels.