It is amazing how vertically integrated GM used to be - for a vehicle they made just about everything except the windshields, the paint, and the tires. They al

It is amazing how vertically integrated GM used to be - for a vehicle they made just about everything except the windshields, the paint, and the tires. They also made city buses, diesel locomotives, fractional HP electric motors, earth moving equipment, consumer kitchen products, and sold insurance. They even had their own university that awarded bachelors and masters degrees. All of that is long gone now.