Standard Ignition NS-377 neutral safety switch for the 2004-2005 Chevrolet Silverado 2500 HD and other vehicles lets the engine start only when the transmission is in park or neutral. This electrically operated switch replaces a damaged unit and restores the neutral safety function.
- Electrically operated 12V switch with a bolt mount
- One rectangular female connector with 11 male blade terminals
- Metal construction with an aluminum and plastic finish
- Materials chosen to withstand extreme conditions
- 100% end-of-line testing on every switch
Quick facts
- Part: Standard Ignition NS-377 neutral safety switch
- Fits: 2004-2005 Chevrolet Silverado 2500 HD and other vehicles
- Material: Metal
- Condition: New
A failing neutral safety switch can leave the engine without a crank in park or neutral, or let it start in gear. These signs alone do not prove the switch is the problem, since a weak battery can also cause a no-crank. The 2004-2005 Chevrolet Silverado 2500 HD takes one.
Fits
Made to OE spec for fit, form and function, this switch is a direct-fit replacement. The vehicles it fits include the 2004-2005 Chevrolet Silverado 2500 HD, the 2004-2005 Chevrolet Silverado 3500 and the 2004-2005 GMC Sierra 2500 HD.
Specifications
Fit and size
- Quantity per vehicle: 1
- Length: 8.375 in (212.725 mm)
- Voltage: 12V
- Connector: 1 rectangular, female
- Terminals: 11, blade type, male
- Mounting: bolt mount
Build and materials
- Material: Metal
- Finish: Aluminum, plastic
- Condition: New
- Country of origin: Taiwan
In the box
One neutral safety switch. Mounting hardware and gaskets are not included, so plan on new bolts.
Interchange: NS38117 · SW8206 · NS6899 · 29541852
This part cross-references / interchanges with the following part numbers:
NS38117, SW8206, NS6899, 29541852
Frequently Asked Questions
Does the 2004-2005 GMC Sierra 2500 HD take this neutral safety switch?
Yes, Standard Ignition NS-377 fits the 2004-2005 GMC Sierra 2500 HD. If your truck is not one named on this page, look for it in the "Vehicles it fits" section.
Does the NS-377 come with bolts or a gasket?
No. This listing is one neutral safety switch only; mounting hardware and gaskets are not included.
How many terminals does the Standard Ignition NS-377 have?
The Standard Ignition NS-377 has 11 male blade terminals in one rectangular female connector. It is a 12V switch with a bolt mount.
Can a bad neutral safety switch keep my truck from cranking in park?
It can. If the switch does not signal park or neutral, the starter circuit may stay open. A shop can test the switch to confirm.
Does this switch replace the SW8206 number?
Yes. SW8206 is on the Interchange line for Standard Ignition NS-377, along with NS38117, NS6899 and 29541852.
