The local Buick Service manager called and told me to bring in on Wednesday.
My son is the service manager for a Buck/GMC dealer in the Minneapolis area. I don't live their so not my dealer.
He had never seen or heard this happening either.
He will check with his techs and GM spec sheets about this.
I bet it is something as simple as disconnecting the negative battery cable!
More to come.
Well today the techs checked everything they could think of.
Ran computer scan, called GM tech support.
Results all agreed that this is something that changed on the newer models and was somehow changed on existing models also.
I had an idea that since there was only one new Buick in the showroom that we should check it's display out.
The SUV was a 2022 Enclave Avenair. The service manager and I checked out the display and it looked the same as mine.
The consensus was that somehow a change was flashed to existing units.
Methinks we will never know.
An interesting sidelight to all this was that they offered me $2,500.00 more that I paid for my car in 2021. It is a 2019 model.
But there is nothing to buy.