The infrastructure bill signed this week will "turn that around in a big, big way," the president said at the grand opening of GM's electric Hummer plant in Detroit.

Current GM International chief, Steve Kiefer, has elected to retire after four decades with the automaker. Amin's promotion and Kiefer's retirement are effective April 1.

The global microchip shortage could be what finally ends the automaker's nine decades of dominance on its home turf.