This from Josh Boyajian:

Here are two shots, Battalion 1 and the remarked 6th battalion.
Battalion 1 – 2014 Ford Police Interceptor Utility (Explorer) Battalion Chief (1st District) 
Shop # B574
Battalion 6 – 2010 Ford Expedition Battalion Chief (1st District)   x-BN19 
Shop #B549
Chicago FD Battalion 6

Josh Boyajian photo

Chicago FD Battalion 1

Josh Boyajian photo