Wow -- great information from you all!
So it seems its a resounding agreement on FLUIDS!!
I was hoping for one or two items -- but many more than I thought of course!
Either way, this is good timing as we have a 1,400 r/t trip in a few weeks -- and then in July we have a 6,000 mile r/t Cross Country Trip :)
Seems this is the list I should give to the Dealership:
(totally NOT looking forward to the bill with this Duramax!)
Oil Change & Oil Filter
Fuel Filter Change
Transmission Fluid Flush & Filter
Brake Fluid Flush
Coolant System Flush
Power Steering Fluid Flush
Rear Differential Flush
Front Differential Flush
Transfer Case Flush
Rear Axle Lube
Inspect Brakes
Inspect Belts
Did I list everything correctly?!