I just did an entire front end including steering box, tie rod ends, ball joints, pitman arm, idler arm etc on a 06 LBZ with 85,000 on it.....
The injectors are a well known and documented issue.
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So you did a front end on an '06. BFD. Doesn't mean they're trouble prone, it just means that one had problems. And injectors AREN'T a well known issue with anything after LB7. Working for a supplier at one time hasn't made you very knowledgeable.
My own truck - '04 LLY with 130K miles. Water pump replaced at 65,000 miles, that's it.