I've got an 05 CC LE w/ big tow that I'm going to drive out to Maine, pickup a 6x12 trailer, and drag back to Colorado. About 2100 miles each way. I've got only 18k miles on my 29 month old truck and have never towed a thing. The engine oil is only a few weeks old, but I'm wondering if I should change the diff oil, tranny or xfer case fluid, or engine coolant. The owners manual isn't much help and I don't trust my dealer. Sounds like I'm also supposed to keep it at 50mph for the first 500 miles of towing.. should be a blast.