I run AT3's on my 1500 silverado and my tahoe.
Got great life out of them on both so far.
Silverado weighs 4800# and tow alot with it. Tahoe weighs 7000# and off road alot in it hog hunting and such. I use the AT3 as my summer tire and the cooper STT as my winter tires.
No complaints out of either and the AT3's will dig thru some goo if you keep the wheel speed up. Haven't gotten stuck with them yet with the Tahoe.
