Originally Posted by 10 2SS/RS 6M
....they probably tried different solutions and found the current one the cheapest way to go.
I kind of doubt they did that. Given what the "fix" is, its more likely some engineer or designer at GM was taking a pee at a urinal and asked the guy cleaning the bathroom what his thoughts on the subject were. Then they went with his idea. Because it was simple and required no technical know how to come up with or execute.