Well, I got my car back! Dead 1-2 shift solenoid for sure. Replaced it and honored their estimate.

I didn't really know what all had to be done to drop the subframe, so I had asked them about an estimate to replace the front shock mounts cause they are shot, if they were easy to get to. Turned out they weren't, and the additional I didn't really want to pay right now, so I declined the service.

Anyway this all is leading up to just how awesome this dealership is...they recently acquired the "Buick-GMC" title in addition to Chevrolet so I thought I'd take my car there for service. Wow, I'm definitely going back again. Here'* what all they did for me that they certainly didn't have to:

They went the extra mile to extract as much of the old transmission fluid as possible, instead of just what drains out the pan. They had to use Dexron III to be able to honor their warranty on the service, but wow, my car has never shifted so nice! It'* like a brand new car, with 164,000 miles...no kidding!

My car sat there for a couple of days while they were waiting for the shift solenoid to come in. They informed me when I came to pick it up that on the test drive to diagnose the problem they had noticed that the struts up front did make a fair amount of noise over bumps. In their spare time between jobs, they went over to my car and had a few glances at the front suspension...shot a little grease in a few places and tightened a few things and wow! They are still the same old nasty mounts (covered in trans fluid to reduce noise, lol) but now they make no noise at all, and my car genuinely feels tighter and less sloppy over bumps. And they didn't charge me anything for it!

Altogether, they honored their original estimate and with tax I paid $669.

Anyway, Glenn Smith Buick-Chevrolet-GMC is great! I will be bringing my car/truck there anytime there is a repair I can't/don't want to do.
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It looks to me as you were taken care of very well.