Didn't know some of that and thanks for the recommendation. And of course I don't blame GM for refusing to pay for a damaged motor caused by the addition of a SC or any other major modification. I never indicated that I thought they should cover it. I simply relayed what I heard first hand from a high level person at a dealership in my area and was wondering 1) if dealers had the flexibility to extend such a benefit and 2) whether anyone else had heard of, or had been offered, a similar assurance of coverage. I especially wanted/want to know if someone added a SC to a C7, damage actually occurred as a result of that modification, and whether someone's dealer covered the repair (parts and/or labor). Based on what you shared, I now know that GM has a policy against it. Good to know. That likely means that any dealer that covers a repair under these circumstances would be doing so out of his own pocket - something that isn't likely to occur. It also means that any verbal statements assuring coverage in this circumstance probably shouldn't be trusted. Thanks for the info elegant.I believe that could occur, and up to recently did occur, were if not for the fact that GM now has a protocol of, on major warranty claims relating to the powertrain, requiring their dealerships to make two specific tests to determine if a motor has been modified BEFORE they will approve a warranty claim. One of those tests includes determining whether any of the computer systems were modified, and the other whether the total power rating has ever been "enhanced" over factory. Can you blaim GM for not wanting to potentially spend between $18K (LT1) and $30K (LT4) on a motor warranty claim, let alone the potential consequent damage the torque tube, transmssion, e diff and more.
Candidly, GM is one of a very few that will not automatically void your warranty if your failure occurred while you were on a race track.
Having said that, we are on this planet once, and if you wish to go for it, that is a personal choice --- YOURS, not anyone else's on the forum. If you choose to do that, with your knowing and being able to afford the possible consequences, GREAT for you!
If I were going to enhance the power of my C7, only two places I would go, e.g., Callaway and Lingenfelter (the same two as mjw930 mentioned).