honestly, never worked with a 97. but what i would do is use that link. THEN. for more reference. use the GM service manual. try this link, i doubt it works, but try. http://sm.gpona.com:9001/si/home.do
if it doesn't go to GPONA - Grand Prixs of North America if you have a username and password. great. enter it and look at the top and click GM service manual. if not get a username and password and do that. then you can search for the 97 grand prix and look in brakes and after playing around with it you should find EBCM removal/installation. It will contain diagrams and be a little more specific on how to get to it and what needs to be removed etc.
Good luck.