We all know most of this, but some of the frame attachment details are very inspiring. (Source: GM Press Release)
The aluminum frame is manufactured using innovative manufacturing processes at GM’s Bowling Green, Ky., assembly plant. The state-of-the-art facility employs several advanced joining technologies to ensure dimensional accuracy within 0.75 mm. Each frame features:
354 spot-welds using a GM-patented process that uses a unique electrode designed specifically for aluminum
188 Flowdrill-machined fasteners, which are installed by a high-speed drill that extrudes the frame material to create a strong, integral collar that is tapped for bolt-on fasteners
113 feet of structural adhesives, used in conjunction with welding and fasteners to increase overall frame stiffness
37 feet of laser welds, which join frame sections via a precise beam of high energy that minimizes heat beyond the weld area for improved structural accuracy.