The EBCM system operates on inputs from the front brakes, rear brakes, and transmission, it's tied into the anti-skid system. Unlike the older systems that are mechanical. Inputs can be manipulated at the computer with the proper equipment, i.e. GM's diagnostic scan tool. Another way is to remove the EEBC and replace it with a manual porportioning valve then trick the brake system electronics so you dont have an ABS light.
Troll some of the drag race websites I know more than a few of them have deleted the EBCM and used manual BPV's and looped the system to stop ABS lights.