New Beginnings. AMTK 300 (ALC-42, Phase VI) arrived in Chicago, Illinois on June 14, 2021 on Amtrak Train 6 (California Zephyr) from the Siemens Factory, and recently returned to Chicago, IL for high speed testing. More at: https://media.amtrak.com/2020/08/amtrak-prepares-for-new-diesel-locomotive-fleet/