I need some feed back on how your tow vehicle is holding up if you have over 100,000 miles on it. I currently have a 2007 Yukon Denali and just turned 100,000 miles. I really like the vehicle and concerned but how many miles will the transmission last before it goes. I keep the vehicle serviced and maintained.The reason I have the concern is I am from the old school that once a vehicle reached a 100,000 miles they fall apart. I had an Avalanche before and the transmission went out on me at 103,000 miles. So am trying to figure out whether I have anything to worry about or should I start looking for a new vehicle? Any input would be greatly appreciated. I only tow the boat a few miles each trip to the boat ramp.