4.2L 6 VORTEC ENGINE

I have a 2005 Isuzu Ascender w/the GM 4.2L 6 cyl vortec engine. No problems, runs fine, but I'm not a historical GM owner. Can anyone provide feedback on
the vortec? Reliability? Oil consumption? etc...?
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Same engine in the Trailblazer plenty of info in any Trailblazer or Envoy forum.

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