Your 2007 manual specifies the following for 100,000 mile service.
Replace spark plugs (N* prefers OEM)
Transmission fluid and filter change (like most members, I recommend against a flush)
Clean throttle body
Everything else is tied to oil change service interval (or every other) or inspections. Your 2007 manual also specifies oil qualified by GM spec GM4718M, same as the N* but earlier V6 were different. I've had great success with Mobil1.
Your dealer will probably want to do more; that's their revenue enhancement plan. I wouldn't unless there's an issue. Inspections are good and should be included for free if you're having this work done.