The ability to weld steel to aluminum is an indicator GM still doesn't want to go as far as Ford on aluminum. It prefers a blended-metals strategy, and GM appears to be sticking with the theory...
Their list of clients includes, but is not limited to, those companies mentioned in the story.
Updated to fix reference to ProMaster.
It was, but correct now. Thanks for pointing out
We have written about that Spydrmn. See: UAW Loses Ground As Mitsubishi Closes Illinois Plant