If they'd stuck with the tried and true i6 from the earlier model trucks it would be alright. Instead they went with the lousy 4.2 V6 that is prone to many problems including the aforementioned hydro-locking. I have read testimonials from literally thousands of people who need to replace their engine at a cost of from $3000-$4000--and that's all the truck is worth. So it will cost what it's worth to repair it. If this were an isolated incident that would be one thing. But it is symptomatic of the 4.2L and there's nothing isolated about it.
Fortunately (for me) when it happened to me at about 55K miles I still had an extended warranty--so it cost me a total of $100. Most people don't have this when their engine throws a rod.