Thanks for stopping in, Ian. I haven't been over to the GM forums lately
since my time away from GM is now getting larger and larger.
I left GM not long after the introduction of the latest
Trailblazer/Envoy/Bravada. As I recall, these vehicles had the oil life
monitor that would go as high as 10k miles. My concern was that it was
possible to get oil sludge and clog the passages to the variable valve
timing mechanism. Have there been any problems with this, and if so, did
the owners appear to change the oil as recommended?