From the Fire Service, Inc. Facebook page:

This unit recived the following upgrades, all in house at Fire Service Inc. New: LED Warning Lights, Complete new Paint and lettering, New ROM roll up doors, New DOT LED lights, Rebuilt engine, suspension, brakes, air system, electrical system (including all new electrical boards) upholstery, cab door panels, A/C systems, Generators and the entire body structure and under carriage support system. Thank you to the City of Chicago !

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

Fire Service, Inc. photo

More photos HERE

Tags: CFD O'Hare Airport firefighting, Chicago FD O'Hare Airport fire trucks, Chicago FD Squad 7, Chicago Fire Department at O'Hare Airport, Chicago O'Hare Airport Fire Department, Chicago Squad 7 gets overhaul, O'Hare Airport Fire Department