Get in, fire her up, and back-out the driveway. Shift into Drive and away we go. Sometimes, ... she runs smooth as silk. Every once in awhile she's a little HARSH picking-up the load and moving forward. There are times when she shifts gears like some kid learning to use a clutch.

The C-E-L Light is ON. Was ON while I drove down to AutoZone for the free Reading of the Codes. Pulled into the parking lot and the light goes OFF.
I swear to God. It was like the Monte healed itself rather than get the Codes read, ... which the guy wouldn't do with the light OFF.

The Engine is running great.
The C-E-L Code was for a O-2 Sensor I got ordered that ain't showed-up yet.
I'm guessing the F/I has a Default "Duty Cycle" that the Mixture is set at, when the Front Bank O-2 Sensor ain't in-the-game ... I don't know.
I need to have the one I ordered from GM-PartsDirect. No wires to crimp.
I think I need a O-2 Removal Socket, too.

All in all. I think she's holding-up pretty well.
With the Lower Intake Manifold Gasket job I got done with the Extended Warranty, ... I don't see having to shell-out any big bucks on needing Engine work.

I got my fingers crossed.
I want to have this car forever.
I love it.

How's yours doing?