OK, now that you know what I'm talking about I can "talk" about the LT4 knock module! These can be bought at your local dealer for around $50 or you can purchase them from Dal at VanDevere Olds for less than $30 (similar savings on other GM parts too!). And YES! I have his phone number
1-800-362-9494 The part number for the LT4 knock module is 16214681. FWIW, the number of the LT1 module that came out of the SS (with the 94 PCM) is 16177700. Here's a pic of what the LT4 knock module looks like (yeah, yeah, I know, this is actually my LT1 knock module) and is located in the PCM under the cover that is held in place by two Torx screws.
Hope this helps....Mike
P.S. If you have never been here before, this guy has an awesome site!
http://www.bfranker.badz28.com/96ss/96ss.htm