Don't be so sure. GM is known for screwing people. I guarantee you if you use that, dealers will claim it's not covered under warranty.
eh, negative. If GM supplies my vehicle with a "tire sealant" from the GM Factory, and it ***** up my wheels, they are covering it. not a matter of "maybe," its a confirm.
Now, if I go and use a 3rd party tire sealant, yeah, different story.