2004 chevy silverado neutral safety switch wiring diagram

PARK/NEUTRAL POSITION SWITCH REPLACEMENT/ADJUSTMENT

*Tool Required: J 41364-A Neutral Position Adjustment Tool
*Apply the parking brake.
*Shift the transmission into neutral.


2004 chevy silverado neutral safety switch wiring diagram

REMOVE OR DISCONNECT

IMPORTANT: The transmission must be positioned into the mechanical neutral position prior to performing this adjustment procedure. The transmission control lever can be positioned to mechanical neutral position by rotating the control lever clockwise until it reaches it's full stop position, and then moving the shift control lever counter-clockwise two detents.

1.Negative battery cable.
2.Shift cable end from the transmission shift control lever by pulling the cable end from the transmission shift control lever stud ball.
3.Nut securing the transmission shift control lever to the manual shaft.
4.Wiring harness connector from the switch.
5.Two bolts securing the switch to the transmission.
6.Switch from the manual shaft.
*If the switch does not slide off of the manual shaft, lightly file the outer edge of the manual shaft to remove any burrs from the shaft.

INSTALL OR CONNECT


2004 chevy silverado neutral safety switch wiring diagram

ADJUST

1.Position Tool J 41364-A onto the park/neutral position switch. Ensure that the two slots on the switch(where manual shaft is inserted) are lined up with the lower two tabs on the tool. Rotate the tool until the upper locator pin on the tool is lined up with the slot on the top of the switch
2.Switch to the transmission manual shaft.
*Before sliding the switch onto shaft, it may be necessary to lightly file the outer edge of the shaft to remove any burrs from the shaft.
*Align the switch hub flats with the manual shaft flats.
*Slide the switch onto the transmission manual shaft until the switch mounting bracket contacts the mounting bosses on the transmission.
3.Switch to transmission with two bolts. TIGHTEN
*Bolts securing the switch to 28 Nm (21 lb. ft.).
4.Remove Tool J 41364 from the switch.
5.Wiring harness connectors to the switch.
6.Transmission control lever to the manual shaft.
7.Transmission control lever to the manual shaft with the nut. TIGHTEN
*Control lever nut to 28 Nm (21 lb. ft.).
8.Lower vehicle
9.Negative battery cable.

INSPECT

1.Check the switch for proper operation.
*The engine must start in the "P" (Park) or "N" (Neutral) positions only. If adjustments is required, loosening the switch retaining bolts and rotate the switch slightly, then tighten the bolts and check the switch for proper operation.

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Thursday, May 6th, 2021 AT 12:21 PM (Merged)

Joined May 8, 2014

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6 Posts

Discussion Starter · #1 · May 8, 2014

so heres the problem.
i drive a 2004 gmc sierra base model with a mual transmission and the 4.3L V6. thing is, yesterday she went dead. all my lights and indications illuminate when i turn the key, but she wont start and my battery voltage needle drops. i had originally thought it was the starter sub-system, but after replacing both the starter and its associated relay, still nada. The battery, clutch and ignition switch are good( the last being as far as i can tell), so im thinking the neutral safety switch is to blame. the only thing is, i have NO idea where to look for it, nor how to replace it. can you guys help me out?

2004 chevy silverado neutral safety switch wiring diagram

Joined Mar 27, 2014

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250 Posts

2004 chevy silverado neutral safety switch wiring diagram

Joined Mar 19, 2013

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1,791 Posts

I'm not certain there's an NSS on a manual trans...

What happens when you jump it off another running vehicle?

Joined May 8, 2014

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6 Posts

Joined May 8, 2014

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6 Posts

Discussion Starter · #5 · May 8, 2014

Let me rephrase that. Nothing happens any different than if it's not being jumped. And as far as the NSS is concerned im not sure that is the right term for the part.

2004 chevy silverado neutral safety switch wiring diagram

Joined Mar 19, 2013

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1,791 Posts

So when you turn the key to start, nothing? No crank? Any clicking?

With a new battery with sufficient CCAs, you should be able to at least get the starter solenoid engaged and crank. That's why I was asking about jump starting. You said you replaced the battery- are the terminals nice and clean?

No chance you've got an OBD2 scanner? If hooked up in the on position, you should be able to hit monitor mode and see the voltage and maybe any any stored codes that would help point you in the right direction.

Joined May 8, 2014

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6 Posts

Discussion Starter · #7 · May 9, 2014

I'll have a scanner Saturday. I also took a multimeter to the battery and it registered 12.66 V, and the terminals are nice and pretty. I think the only sound I got was a faint whine from in the engine.

Joined Oct 15, 2013

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109 Posts

check your fuses under the hood

on the nnbs they have a DLIS 2 amp fuse that will not let them crank if blown

one more thing right before trying to crank position 2 in the ignition key do you hear the fuel pump turn on ?

swap relays and test lol maybe you have a stuck relay

2004 chevy silverado neutral safety switch wiring diagram

Joined Apr 24, 2014

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163 Posts

With the voltage drop it sounds more like a ground or dead short problem?

Joined May 8, 2014

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6 Posts

Discussion Starter · #10 · May 9, 2014

I will try all of these tomorrow and update you all.

Joined May 8, 2014

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6 Posts

Discussion Starter · #11 · May 14, 2014

So there's no way that my clutch is ****ed, right?

Joined May 29, 2014

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39 Posts

Have you checked your clutch pedal position sensor? It's probably bad and not letting the truck crank!

Can you bypass neutral safety switch?

This switch keeps your vehicle from starting in gear, and is important for the function of the vehicle. They keep children left alone in the car from starting it up in gear, and also guard against similar surprises after accidents. To make it short, this is a safety mechanism and should never be bypassed.

How do you manually test a neutral safety switch?

Put the gear to Park, then try to start. If you notice the engine not cranking, step on the brake, then try starting in Neutral. If the engine starts, then the neutral safety switch has gone bad.