Back on topic......

Here is the "GM Universal Auto TCS Off Module" being talked about:
http://www.easyperformance.com/produ...e?cookietest=1

I can't find any instructions, but I seem to recall that it t'd into the wiring on the back of the DIC.

Assuming that the TCS was working normally before, there is still a problem. Bad part(s)? Bad wiring? Time to start testing everything.