Heres what I have. 96 gmc 1500 that had 5.0/auto. swapped in 03 5.3/auto.
With nelson wiring/pcm hooked up get nothing with the key. If I put power to starter solenoid it will crank but won't start. It is getting fuel because I smell plenty.

Park/neutral safety switch wire isn't hooked up currently. Also the dash isn't showing any position for P R N D 3 2 1.

If I hook the red wire from nelson fuel pump relay wiring to gray wire on fuel pump it still wouldn't start. Fuel pump kicks on whether the red wire is hooked up or not.

Purple wire in nelson harness goes to solenoid. Do we keep the wire to the small terminal on solenoid along with this wire?

Any help would be appreciated.