Hi, 59 Toaster. I worked at a few Chevrolet dealers and one combo Oldsmobile / GMC dealer and at that time General Motors, as Frank S. stated, would not honor warranty work on other GM vehicles. [Ford would work on all their lines] But GM had to change this because they were dumping Oldsmobile and someone had to take care of their warranties. So I think, but can't conferm,that GM changed their policy.
You guys are pretty sharp out there. So I have three trivia questions for you.
1. Who invented the automotive assembly line?
2. How many mules are in the twenty mule team?
3.What very common part of American made cars, dateing clear back into the fifties, had a metric measurement?