If they are the Michelins, call them(tire manufacturer) they have a recall out on them, and they have little to no wear and have the sidewall cracking, theyll pay for a new set of tires.
Buddy of mine ended up swapping his stock tires for some 315BFGs for about $50 out of pocket(5tires)
Call Michelin and file the claim, then go up the Discount and get some new tires for free
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'07 5.9 Mega Cab 2wd/G56