Mine were peeling off. During a visit for an oil change brought it up to my service adviser she had them replaced under warrantee. All they did was pulled the old ones off cleaned the contact area very well and put new ones on they come with sticky tape on them new. Not an issue since they fixed it.
That is sick I love the rims. What size tires are you running? Did they have to bead blast the rims first? If you don't mind me asking how much did they charge.
Good question I specifically asked my service advisor if the leveling kit would void any part of my warrantee he said no because they were going to do the install and it was a leveling kit that they sell and recommend. So far so good I love the Fabtech kit the truck rides and handles a lot better.
On another note I forgot to make a video of the install I can try to figure out how to post the sound clip I made. It was pretty straight forward I cut the pipe as close to the muffler left the flapper valve and welded in a piece of 3" pipe. I basically went off this posted by another member. http://www.gm-trucks.com/forums/topic/154538-muffler-delete/
Today I took it into the dealership and had them install the 2" leveling kit from fab tech. I love how the truck sits now. They cut me a good deal parts labor and alignment only 320 bucks out the door