I have a 2005 ISUZU Ascender, which is a somewhat disguised
Trailblazer/Envoy. It has the 4.2L 6cyc Vortec engine. Other
than drinking gas by the gallons, the engine seems to run
very smooth. I'm curious if any reader here has comments
about this engine?
I'd rate it as a very good engine. We literally do "nothing" to
this engine. It does suffer from the piston knock that some
other GM engines have, but for some reason, very few customers
complain about it.