From what I heard is GM will be going all Aluminum in 2016. Something that is uniquely different on the GM aluminum is they won't have to do the almost Billion dollar factory re-tool like Ford has done. GM filed something like 15 patents on a new way to weld aluminum. So where Ford is riveting the aluminum, GM has a new procedure to weld which means they can fit their current equipment with the required parts for probably 1/4 of what Ford spent.
Good article on it:
http://www.autonews.com/article/201...pends-big-gm-joins-aluminum-with-simple-welds
Good article on it:
http://www.autonews.com/article/201...pends-big-gm-joins-aluminum-with-simple-welds