That's a good point to post ever so often. I just invested in a torque wrench and the correct sockets, extensions, etc. to permit me to check both the lugs on the truck as well as the trailer. In checking the duallies on the truck in the past - at a GM dealer - I've found them to be considerably off torque after only 1500
miles of driving. Duals apparently work one against the other to loosen the nuts. Since I do a 7-wheel rotation every 7,500 miles it's a lot easier to own the torque wrench than to go back to the dealer every time - if I'm still anywhere near the dealer!. Some dealers will look at you like you're nuts when you tell them you want to check the lug nuts with a torque wrench - and I haven't found a single GM dealer so far that knew what the correct torque was suppose to be. Truth is, most tire men use the same air-drive torque wrench for everything they're working on - with no thought to torque settings.