How do you adjust the nEUtraal safety switch on a 1978 gmc 350 VANDURA?

To adjust the neutral safety switch on a 1978 GMC 350 Vandura, first, locate the switch on the transmission, typically mounted near the gear selector. Ensure the vehicle is in park or neutral, then loosen the switch mounting bolts slightly. Adjust the switch until it properly engages when in the neutral or park position, then tighten the bolts and test the functionality by starting the engine in both positions. If the engine starts only in neutral and park, the adjustment is successful.