Shifter will not come out of park

[westofb]

I am quickly approaching the end of my ls swap into my 95 2wd ext cab, but have yet to make final connections from the ls harness to the truck to get gauges and speedo to work. I do have the motor installed as well as the stand alone harness in the truck. The motor starts and sounds great, however, I went to put it in gear to test new trans and the shift interlock is engaged. It will not come out of park with the engine running. I used the 95 neutral safety switch and the 4 wire plug on it feeds both the ls harness as well as the truck harnesses. I am missing something? The truck before the swap would shift from park engine running or not with the key on as long as you touched the brake pedal. Any help would be appreciated, I have yet to make the connection from the ls harness to the truck harness for the tcc brake hook up, maybe that is the issue? I'd like to have the interlock work as gm intended, but would not be opposed to a quick fix that eliminates this feature, ideas?
Thanks for any input you guys might have.

[1991SSP]

it's mounted on the steering column,, you can unplug it

[westofb]

it's mounted on the steering column,, you can unplug it

thanks

[westofb]

Found my problem, during the swap I eliminated my abs (didn't work anyway) and removed all remnants of it. I then replaced my rusty booster and master cylinder and got set up from an 88-91 obs truck. In the swap parts I got the all the parts I needed from the donor truck including the front brake lines and proportioning valve. The problem I had stemmed from the older brake booster, the rod that attaches to the brake pedal fit the stud tightly, the 95 booster fit loosely. The reason the 95 fits loosely is so the stud could move inside the booster rod and engage the brake switch....the slop is necessary for the switch to operate! It took quite a bit of head scratching to figure out the problem, mostly studying how the switch operates. Bought a correct year booster (the one that came off the truck was scrapped) and everything works as it should. I guess attention to detail would have saved me a lot of headaches!