[f5fstop]

First, very good information.
Second, let's get one thing straight...a dealer CANNOT void a warranty that is issued by General Motors. They can notify GM, and GM through their warranty department, void the warranty on certain parts, that are affected by accident, misuse, aftermarket additions, etc.
If the dealer issues the warranty like for a sale of a used car, then the dealer can void that warranty or parts of that warranty. However, a factory warranty is just that, it is issued by the factory, in the case of a H3, General Motors Corp.
Third, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle. That is part of the Magnuson Moss Warranty Act. However, this can be misleading, since under most circumstances that a manufacturer voids items in a warranty, they have substantial proof, the aftermarket modification can cause problems. Good example is a SC, add one, blow the engine, and I will bet you will pay the cost yourself. (Unless you have one hell of a relationship with the service manager, or photos of the manager in a very compromising position.)
GM as well as all other manufacturers know how far to push the Magnuson Moss act, and they are pretty good at winning in arbitration and/or the courts.
Now, everyone can forget this post, and get back to the great information and discussion on lifting, larger tires, gear ratios, and all that great stuff.