From an engineering perspective, This is sad, really sad.
But this is what happens when Engineers who are doing their jobs are overruled by bean counters and management to save a few bucks or even a few cents
A short to ground, which is the worst case scenario, and catastrophic in any circuit, especially in a high current DC based system as in a car is
one's highest priority in the design of any system and/or component.
For the simple reason as mandated by the recall, it can lead to fire.
A very basic solution to this engineering oversight is very simply put and is commonly called a FUSE.
A simple $.02 fuse between the module in question and ground would burn up before the module and the resulting car would.
Most likely the engineers had a fuse in place but the bean counters pointed out the $.02 savings, cost projected over X number of years....Blah Blah
Blah and the fuse was eliminated by management as a result.
The Manager gets another promotion for saving those $.02 over X number of years .....Blah Blah Blah. But he's also a swell golfer for the GM golf
Ford hasn't exactly been immune to such issues either.
If you recall FORD had the issue with it's cruise control modules melting down and causing fires in the F-150s and Explorers, their bread and butter,
resulting in recalls as well.
As I had said, this is the way engineering in the American Auto industry works, and also as to why they are losing business.
If they can save a penny per car, they most certainly will.
And on a final note, this is EXACTLY what W. Edwards Deming had warned GM and Ford about in the 1950's.
They are called simply put.....Defects.