Belladonna called me with the news: The Malibu's intermittent electrical problem was the ignition module and the key cylinder.
I did not argue.
$600 later and it is on the road.
Mrs ERJ reminds me to "normalize" the repair costs to the cost of car payments. The last major repair was over a year ago and $50/month is dirt cheap compared to new car payments.
The Silverado's exhaust system disassembled itself in Ann Arbor on the way home last week. That was $250 to get fixed.
I am clearly strapped for cash over the next few months.