Now I could pout and shout, but once again it happened in a reasonable place and time. I broke down at around 10am, called AAA on the cellphone -- has new batteries and was fully charged so I didn't have to be anxious about the 16-minute call time to AAA -- and I have extended towing, so bringing it back 70 miles to Lemmen-Grand Chevy was no problem, and the driver even swung by my house so I could get the Summer Blazer and all "done" by 12:30. (Except for the diagnosis, urk! But even at that it's Thursday, so they work until 7pm, not 5pm, so I should have some kind of answer today.)
Okay, I had to call Western and cancel classes for today -- man, the third cancellation day for me this semester, that's a dubious record -- but the weather was dry and it wasn't rush hour or after hours.
So... it all could be so much worse, that I'll save the complaining for some other occasion.