Can you just change the electronic control by itself instead of disconnecting the whole module? I have an 04 with TC and have the same issue. Mine has not been working for a few years now. So long that the TC and ABS light doesn't even go on anymore. Once in a while they will both illuminate but usually stay off. I too plan on swaping out the module but I may try to just change the electronics, not sure if that can easily be done though.
Steven
2004 Marauder Black, loaded
Vortec S/C
4.10s
3500 PI Stall
Kook's headers
476.9 rwhp 385 lbs/tq
KVR's, QA1's, M&Z control arms, rear sway bar
Lidio tune
2004 Suburban Dark Charcoal
1970 W-30 442 convertible twilight Blue