My 98 tahoe has all the factory wiring still in place... when I set my new drivetrain in will I be able to re use the module that was unbolted from my stock 4L60E and retain my gear indicator light on the cluster?? I am going to leave the stock harness where it is and clip off all the plugs that are not needed, heatshrink the ends and tuck them away... I will be using a harness and PCM program from PSI for the new engine and trans