The surfaces could definitely get messed up, but that's a lot different than breaking. If lubrication failed the wrist pin would not typically be the first thing to go. A big end rod bearing has a lot more movement than the wrist pin and would likely fail first.I am pretty sure nothing actually "broke" but if a wrist pin did not get sufficient oil would not the bearing surfaces associated with that wrist pin not fail? These surfaces are splash lubricated rather than pressure lubricated like the other major bearings, right? Seems like that would leave them a little more vulnerable to lubrication issues.
The interesting part of this is that the dealer would just write of an entire engine as dead without even looking inside!? In any event please let us know what the bill will be.Just talked to the dealer-they said that GM does not have them open the motor, SO I may never know what actually failed.
They did say that a new engine should arrive by Friday though-that will be two and a half weeks after the failure. Hopefully have it in a week or so later?