My grandfather got some Michelin X Radial LTs for his 99 Silverado Z71 and they are great. We have the original Michelin LTX M/S on our expedition, 40,000 miles, I would say probably another 10, 15k left on them. I don't know anything about the LTX M/S2 but if they are anything like the others, don't worry. But I say if you can find them, try the X Radials