It depends on whether or not you look at the instructions for replacing or adjusting the NSS, but I figure you will just have to install it and then follow the procedure for adjustment because I don’t know of anyone that would have one of GM’s fancy little alignment tools on hand. I figured I would list both sets of instructions though, just so you would have them and let you decide what made sense.
Neutral Safety Switch Replacement
1. Install the switch to the transmission manual shaft by aligning the switch hub flats with the manual shaft flats.
2. Slide the switch onto the transmission manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
Do not tighten the bolts at this time.
3. Install the switch to the transmission with two bolts finger tight.
4. Position the tool J 41364-A onto the park/neutral position switch. Ensure that the two slots on the switch where the manual shaft is inserted are lined up with the lower two tabs on the tool.
5. Rotate the tool until the upper locator pin on the tool is lined up with the slot on the top of the switch.
Tighten the bolts securing the switch to 25 N•m (18 lb ft).
6. Remove J 41364-A from the switch.
7. Connect the electrical connectors to the switch.
8. Install the transmission control lever to the manual shaft with the nut.
Tighten the control lever nut to 25 N•m (18 lb ft).
9. Lower the vehicle.
10. Check the switch for proper operation. The engine must start in the P (Park) or N (Neutral) positions only. If proper operation of the switch can not be obtained, replace the switch.
Neutral Safety Switch Adjustment
• Apply the parking brake.
• The engine must start in the P (Park) or N (Neutral) positions only.
• Check the switch for proper operation. If adjustment is required, proceed as follows:
1. Place the transmission range selector in the N (Neutral) position.
2. With an assistant in the drivers seat, raise the vehicle.
3. Loosen the park/neutral position switch mounting bolts.
4. With the vehicle in the N (Neutral) position, rotate the switch while the assistant attempts to start the engine.
5. Following a successful start, turn the engine off.
6. Tighten the bolts securing the switch to the transmission.
Tighten the bolts to 25 N•m (18 lb ft).
7. Lower the vehicle.
8. Check the switch for proper operation. The engine must start in the P (Park) or N (Neutral) positions only.
9. Replace the park/neutral position switch if proper operation can not be achieved.