1994 C1500 PU, Auto Trans with the 4.3L

Moved the truck out of the driveway. Hour later went to put it back...no start, not even the sound of the starter solenoid clicking. All accessories work, strong headlights, battery over 12v. I tried moving the shift selector and steering wheel, no luck.
Reminds me of a bad neutral safety switch. Any ideas on where it is located on this truck? Can I verify whether it is bad or not? GM part number?

Thanks in advance.