You don't mention if you're putting in a Gen III or Gen IV motor. For Gen 4 you don't use a tac module, just the pedal. The pedal from a 2012 Yukon fits and works great, It's a lot easier than trying to retrofit back to DBC. The only issue is you have to make a bracket to mount the pedal too. The bracket you make is mounted where the stock pedal mounts, and your DBW pedal mounts to that. It's possible that someone makes a bracket now. I used a bracket from LSWrangler.com. it was meant for a jeep, but with minor modification it works. The main issue is that the angle is not optimum, you have way to much leverage on the pedal and consequently it feels like almost zero resistance.

BTW, I have a 2012 L94 in my 1992 full size Blazer, so pretty much identical swap from this perspective. The 92-94 is actually easier in some ways, as the ABS is a separate computer from the ECM. On the other hand, you already have cable shifting, so putting in a 6L80 tranny is a lot easier if you want to get away from column shifting.