Check the front and rear axle fluid levels; just for peach of mind. i would say check the T/case fill too, but that can be tricky, depending on when your vehicle was manufactured. Some fill levels are at the fill plug like the diffs, some are above the fill plug.
Best source of information is the owner's manual and the maintenance requirements. Don't trust a dealer, they will try and sell you everything from a fuel injector cleaning to a flush and fill of the tires with fresh air.