I was simply talking in general about a powertrain warranty may be voided, but something that isn't tied to the powertrain and stock GM should very well retain the 3/36. The difference about these SLP cars now vs. the 4th gens is this time the dealer sends the SLP car out for modifications, NOT GM. So GM is not "contracting" out the modifications, so to speak. Could send it to Joe's muffler shop for all that matters. Mods are mods, doesn't matter who's doing it. If nobody else is covering the warranty, GM understandably won't, and you're taking on that risk when modifying your car.
If you're worried about a warranty, then don't buy a modified car unless GM is doing it. And if you do, make sure whoever modified it stands behind it. If not, take a bite out of the responsibility sandwich and be prepared to shoulder the burden of not having a full factory warranty.
I really don't feel sorry for anyone having an SLP car that's had power adders stuck to it having their powertrain warranty voided. It should be expected. If you want to play, you got to pay.
2010 2SS/RS Auto, Sunroof, Engine Cover. Transformer Edition package.
2013 ZL1 ragtop #5478. 1 of 54 CRT M6 'verts.