When I had about 18,000 miles on our GXV Kenworth Patagonia I stopped in to the Goodyear Commercial Tire dealer in Springfield MO who supplies the tires to GXV to ask about tire rotation. They looked at the Goodyear G278 tires and did not recommend a rotation based on the wear of the rather large lugs on these tires. Looking at the front to rear wear on the lugs was the indicator used to determine when tire rotation was needed. As long as there wasn’t a significant difference in tread thickness between the front and back of the lugs there was no reason to rotate as long as there was no other wear pattern on the tires. When the lugs do show the difference in lug depth then the rotation is from side to side to even out the wear. You can also rotate front and rear to even out wear between drive and steer tires as long as you also do side to side was the recommendation. I now have 33, 000 miles and plan to have them look at them again next week to see if rotation is recommended.
I also had them look at a damaged lug on the side of one tire that probably happened from road debris at some point. The lug looked pretty badly damaged to me but after poking around with an ice pick they said that there was no damage to the structure of the tire and no reason to not keep using the tire. After another 15,000 miles I have seen no change to the damaged lug.
Waveslider, I had a brief look your truck today at GXV, looks nice. We are stopping back in tomorrow morning to finish dropping off our truck for service and I want to get a better look.