The '04 Kodiak has 105K on the odometer, and has started the dreaded LB7 white, stinky smoke at idle. It also loads up and dumps a cloud on takeoff. No obvious oil dilution or fuel knock - yet.

First set was at ~50K and the next set of 8 lasted almost exactly the same. With higher RPMs and fuel consumption, it would put the lifespan of each set at about 80-100K, compared to 2500 or 3500 series truck - if you consider the gallons fuel that has passed through, not miles traveled.

Since GM mailed me a letter extending the warranty to 200K, I am not too upset, but will require a few days off the road. I may put 20-30K on this set and start looking for the next heavy tow rig...that way the new owner would have 60-70K of warranty left, before they would be on the hook for a new set.

Everything else still works great. Overall, very happy with the truck.