Well, I've finished sealing up the intake manifold coolant plate.
While I was at it I removed the throttle body because I was concerned with the possibility of leaking into the intake.
It looks like it had been leaking a little too.
Sure was a lot of carbon and grime in there. It was worth it to remove it for a cleaning, even with as low mileage as I have. I'm sure now, with the EGR bypass, that it won't be getting that dirty again. Now I know why it'* necessary to do in order to keep an intercooler heat exchanger clean.
This really pisses me off..........there shouldn't be this kind of premature leaking in an almost new vehicle.
I really hope that GM designers monitor this site for some feedback.