Yikes. You just got GM to pay $20k for something that was in no way their fault. Anyone wonder why the price of the V3's ended up about $30k higher than the V2's? Warranty costs was no doubt one of the factors. I for one don't appreciate having to pay higher vehicle and warranty costs because somebody was grossly negligent and destroyed a perfectly good engine.I drove across the country with the new hardware and no tune, with multiple engine limp modes.
You feel "Stiffed" by the dealer? Are you kidding? I know what my dealer's service manager AND our zone rep would have said when they saw your modifications and heard you drove it across the country like that. It would have started with a laugh. If that dealership is audited, GM can deny that entire job and then the dealership has to eat that $20k. In GM's eyes, they committed warranty fraud. The modifications destroyed the engine, not defective products, workmanship or assembly which are the only things the factory warranty is supposed to cover.
Like I said, Yikes.