This from Mike Summa for #TBT:

For TBT-This was the Park Forest Fire Dept.’s Engine 51, a 1970’s/1980’s GMC/FMC commercial.  And that is all I know about this rig.  Anyone with more information please fill in the blanks.   Enjoy and comment.
Mike Summa
#chicagoareafire.com; #TBT; #MikeSumma; #ParkForestFD; #GMC; #FMC;

Mike Summa photo