Well, that Dave's Auto post is the first information I've seen that tracks with my truck's issue. I'm still pissed that a barely year old truck with 16k miles died at idle. It was broken in properly, serviced when it was supposed to be by the dealer (most recent dealer service was 6 days before it died), and babied.
Talked to the service manager earlier this week. Looks like a top end rebuild instead of a new engine. From what I was told, there was a piston failure that will require replacing two pistons and a bunch of valves (looks like valve parts were found in the cylinder.
Now I need some advice... I told the dealer that regardless of what GM told them (GM told the dealer to rebuild, not replace the engine), I didn't pay all that money last year (cash, not financed) for a rebuilt engine. I paid for a new engine and I want it replaced, and i want the powertrain warranty reset to zero. The service manager said she would insist on that too, but they could only do what GM said was covered under warranty, and that's a rebuild. She gave me the number and I took it up with GM, and told them the same thing. Waiting to hear back now. Should I continue to insist on a new engine, or is a rebuild just as good at this point?