why don't you spend some time looking through the website of the chicago
office? http://uscis.gov/graphics/fieldoffices/chicago/aboutus.htm
according to the website:
For First-Time EAD Card Issuance: You may submit the completed I-765 together
with the I-485 (Application to Register Permanent Residence or Adjust Status),
I-130 (Petition for Alien Relative), and the other forms for processing
according to the instruction for the "One-Stop" Adjustment Package.
Chicago office is processing 485 with