LT 285/75R16 Michelin LTX Tires on stock GM Rims

I would not do it. The tire and wheel must be designed for one another, you will have more instability with the narrow wheel.

We went with 285/70-17 on a Dodge wheel, Some years fit. Two years later and maybe 25,000 miles its been a good ride. $200 for the wheels in very good condition. We have Michelin's they are a very big stock tire.

Costco will not mount the tires on the wheels on a GMC but they will mount the tires on the wheels on a Dodge. Costco mounts the tires, I mount the wheels on the GMC.