Recently came across this site while researching a problem with my 2007 6.7l cummins.Have already learned more about my truck in 2 days, than the past year that I've owned it! Purchased the truck about a year ago,in the states, and brought it home to B.C. Canada.Truck has been great, but recently I've ran into some issues.... local dealership tells me that the VGT actuator needs to be replaced (works intermitant)- to the tune of $1500.00 cdn. OBD 2 reader is giving me a code # u0100 (lost comm. with ecm/pcm A.) Truck has 41000 miles on it, and the aftermarket warranty I purchased, (old republic) won't cover it.I use the truck to tow a 20ft alum. jet boat, and construction trailer - but it spends most of it's time shuttling me back and forth to work, about 30km each way.Don't claim to be any kind of a mechanic,would appreciate any kind of feedback.....Looking forward to learning more about my rig on your site, thanks