The best Viper Tech in the area is at Roanoke Motors, which is about 100 miles South of Chicago. Most of the Chicago guys take their cars to Roanoke. I am about 100 miles south of Roanoke, and I always make the trip to Roanoke if I have a problem. Dave is the Viper Tech, and he is awesome. You can reach Dave at 1-800-541-6858.
Good luck with whatever your problem is.
Scott