Standard Ignition NS-636 Neutral Safety Switch

Brand Standard Ignition NS-636
Color White
Connector Gender Male
Connector Shape Rectangular
Finish Plastic
Material Plastic
Mounting Type Bolt Mount
Terminal Gender Female
Terminal Type Blade
Fits Chevrolet, GMC, Cadillac, Hummer, Saturn, and Pontiac · 270 vehicles

OE-spec direct fit. Restores neutral safety function with proper fit, form, and function.

Copper alloy conductors. Deliver strong conductivity with low resistive losses.

Bolt mount design. Installs securely with a rectangular connector and blade terminals.

Cross-references 1S12278, 24224216 and CSW533 for the same application. See all 5.

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Neutral Safety Switch Replacement for GM Vehicles

Restore proper park/neutral start function with the Standard Ignition NS-636 neutral safety switch. This direct-fit replacement is built to OE specifications for proper fit, form, and function on a wide range of Chevrolet, GMC, Cadillac, Hummer, Pontiac, and Saturn applications.

Designed with a white plastic housing, a rectangular male connector, and a 6-blade female terminal layout, the NS-636 is made for dependable electrical operation in demanding service conditions. It is a practical choice for drivers searching for a neutral safety switch for Chevrolet Silverado 1500, GMC Sierra 1500, or Cadillac Escalade applications.

Key Features

  • Direct-fit neutral safety switch replacement for OE-style service
  • OE-spec construction for proper fit, form, and function
  • Copper alloy conductors for strong electrical conductivity and low resistive loss
  • Plastic housing with bolt-mount design
  • Rectangular 1-connector layout with 6 blade terminals
  • Built to meet the demands of professional repair work

Detailed Description

Standard Ignition NS-636 is an electrically operated neutral safety switch used to restore the vehicle’s neutral safety function and help prevent starting in the wrong gear position. It is engineered as a direct replacement for damaged OE units and is manufactured to OE specifications for consistent installation and operation. This part cross-references 1S12278 and 24224216 for the same application. Common search terms for this part include neutral safety switch for Chevrolet Silverado 2500 HD, GMC Yukon, and Cadillac CTS.

The switch uses copper alloy conductors to support efficient current flow, while the robust plastic construction helps it stand up to routine underhood and drivetrain service conditions. The NS-636 is a fitment-based replacement for many GM trucks, SUVs, and performance cars across the 2004-2019 model years.

What It Helps Fix

  • Engine cranks only in certain gear positions
  • No-start condition when the transmission is in Park or Neutral
  • Intermittent starter engagement caused by a worn switch
  • Incorrect neutral safety function after switch failure
  • Electrical issues related to a damaged OE neutral safety switch

Installation Notes and Tips

Verify the connector style, terminal count, and OE part number before installation. This NS-636 uses a bolt-mount design with a male rectangular connector and female blade terminals, so matching the original configuration is important for proper installation. Confirm vehicle-specific fitment for applications such as Chevrolet Express 2500, GMC Savana 3500, and Cadillac Escalade before ordering.

Quality Assurance

Standard Ignition manufactures this switch to OE specification using durable materials and copper alloy conductors for reliable electrical performance. The design is intended to restore neutral safety operation with the fit and function expected in professional repair service.

This part fits 270 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelSubmodelTransmissionLitersCylindersPositionNotes
2019ChevroletExpress 2500————N/A—
2019ChevroletExpress 3500————N/A—
2019ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2019ChevroletSilverado 2500 HD——6.0LV8N/AArena
2019ChevroletSilverado 3500 HD——6.0LV8N/AArena
2019ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2019GMCSavana 2500————N/A—
2019GMCSavana 3500————N/A—
2019GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2019GMCSierra 2500 HD——6.0LV8N/A—
2019GMCSierra 3500 HD——6.0LV8N/AArena
2019GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2018ChevroletExpress 2500————N/A—
2018ChevroletExpress 3500————N/A—
2018ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2018ChevroletSilverado 2500 HD——6.0LV8N/AArena
2018ChevroletSilverado 3500 HD——6.0LV8N/AArena
2018ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2018GMCSavana 2500————N/A—
2018GMCSavana 3500————N/A—
2018GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2018GMCSierra 2500 HD——6.0LV8N/A—
2018GMCSierra 3500 HD——6.0LV8N/AArena
2018GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2017ChevroletCaprice————N/A—
2017ChevroletExpress 2500————N/A—
2017ChevroletExpress 3500————N/A—
2017ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2017ChevroletSilverado 2500 HD——6.0LV8N/AArena
2017ChevroletSilverado 3500 HD——6.0LV8N/AArena
2017ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2017GMCSavana 2500————N/A—
2017GMCSavana 3500————N/A—
2017GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2017GMCSierra 2500 HD——6.0LV8N/A—
2017GMCSierra 3500 HD——6.0LV8N/AArena
2017GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2017GMCYukon XL——5.3LV8N/A—
2016ChevroletCaprice————N/A—
2016ChevroletExpress 2500————N/A—
2016ChevroletExpress 3500————N/A—
2016ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2016ChevroletSilverado 2500 HD——6.0LV8N/AArena
2016ChevroletSilverado 3500 HD——6.0LV8N/AArena
2016ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2016GMCSavana 2500————N/A—
2016GMCSavana 3500————N/A—
2016GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2016GMCSierra 2500 HD——6.0LV8N/A—
2016GMCSierra 3500 HD——6.0LV8N/AArena
2016GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2016GMCYukon XL——5.3LV8N/A—
2015CadillacATS————N/A—
2015CadillacEscalade————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015ChevroletCamaro————N/A—
2015ChevroletCaprice————N/A—
2015ChevroletCorvette——6.2LV8N/A—
2015ChevroletExpress 2500————N/A—
2015ChevroletExpress 3500————N/A—
2015ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015ChevroletSilverado 2500 HD——6.0LV8N/AArena
2015ChevroletSilverado 3500 HD——6.0LV8N/AArena
2015ChevroletSS——6.2LV8N/A—
2015ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015GMCSavana 2500————N/A—
2015GMCSavana 3500————N/A—
2015GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015GMCSierra 2500 HD——6.0LV8N/A—
2015GMCSierra 3500 HD——6.0LV8N/AArena
2015GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2015GMCYukon XL——5.3LV8N/A—
2015GMCYukon XL——6.2LV8N/A—
2014CadillacATS————N/A—
2014CadillacEscalade————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014ChevroletCamaro————N/A—
2014ChevroletCaprice————N/A—
2014ChevroletCorvette—Automatic——N/A—
2014ChevroletExpress 2500————N/A—
2014ChevroletExpress 3500————N/A—
2014ChevroletSilverado 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014ChevroletSilverado 2500 HD——6.0LV8N/AArena
2014ChevroletSilverado 3500 HD——6.0LV8N/AArena
2014ChevroletSS——6.2LV8N/A—
2014ChevroletSuburban 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014ChevroletTahoe————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014GMCSavana 2500————N/A—
2014GMCSavana 3500————N/A—
2014GMCSierra 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014GMCSierra 2500 HD——6.0LV8N/A—
2014GMCSierra 3500 HD——6.0LV8N/AArena
2014GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2014GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013CadillacATS————N/A—
2013CadillacCTS————N/A—
2013CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletAvalanche————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletCamaro————N/A—
2013ChevroletCaprice——3.6LV6N/A—
2013ChevroletCaprice——6.0LV8N/A—
2013ChevroletCorvette—Automatic——N/A—
2013ChevroletExpress 2500————N/A—
2013ChevroletExpress 3500————N/A—
2013ChevroletSilverado 1500——4.3LV6N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletSilverado 1500——4.8LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletSilverado 1500——5.3LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletSilverado 1500——6.2LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletSilverado 2500 HD——6.0LV8N/AArena
2013ChevroletSilverado 3500 HD——6.0LV8N/AArena
2013ChevroletSuburban 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013GMCSavana 2500————N/A—
2013GMCSavana 3500————N/A—
2013GMCSierra 1500————N/A—
2013GMCSierra 2500 HD——6.0LV8N/A—
2013GMCSierra 3500 HD——6.0LV8N/AArena
2013GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2013GMCYukon XL 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012CadillacCTS————N/A—
2012CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletAvalanche————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletCamaro————N/A—
2012ChevroletCaprice——3.6LV6N/A—
2012ChevroletCaprice——6.0LV8N/A—
2012ChevroletCorvette—Automatic——N/A—
2012ChevroletExpress 2500————N/A—
2012ChevroletExpress 3500————N/A—
2012ChevroletSilverado 1500——4.3LV6N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletSilverado 1500——4.8LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletSilverado 1500——5.3LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletSilverado 1500——6.2LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletSilverado 2500 HD——6.0LV8N/AArena
2012ChevroletSilverado 3500 HD——6.0LV8N/AArena
2012ChevroletSuburban 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012GMCSavana 2500————N/A—
2012GMCSavana 3500————N/A—
2012GMCSierra 1500————N/A—
2012GMCSierra 2500 HD——6.0LV8N/A—
2012GMCSierra 3500 HD——6.0LV8N/AArena
2012GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2012GMCYukon XL 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011CadillacCTS————N/A—
2011CadillacEscalade——6.2LV8N/A—
2011CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011CadillacSTS————N/A—
2011ChevroletAvalanche————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011ChevroletCamaro————N/A—
2011ChevroletCaprice————N/A—
2011ChevroletCorvette—Automatic——N/A—
2011ChevroletExpress 2500————N/A—
2011ChevroletExpress 3500————N/A—
2011ChevroletSilverado 1500————N/A—
2011ChevroletSilverado 2500 HD——6.0LV8N/AArena
2011ChevroletSilverado 3500 HD——6.0LV8N/AArena
2011ChevroletSuburban 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011GMCSavana 2500————N/A—
2011GMCSavana 3500————N/A—
2011GMCSierra 1500————N/A—
2011GMCSierra 2500 HD——6.0LV8N/A—
2011GMCSierra 3500 HD——6.0LV8N/AArena
2011GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2011GMCYukon XL 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010CadillacCTS————N/A—
2010CadillacEscalade————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010ChevroletAvalanche————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010ChevroletCamaro————N/A—
2010ChevroletCorvette—Automatic——N/A—
2010ChevroletExpress 2500————N/A—
2010ChevroletExpress 3500————N/A—
2010ChevroletSilverado 1500————N/A—
2010ChevroletSilverado 2500 HD——6.0LV8N/AArena
2010ChevroletSilverado 3500 HD——6.0LV8N/AArena
2010ChevroletSuburban 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010ChevroletTahoe——5.3LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2010ChevroletTahoe——6.0LV8N/A—
2010GMCSavana 2500————N/A—
2010GMCSavana 3500————N/A—
2010GMCSierra 1500——4.3LV6N/A—
2010GMCSierra 1500——5.3LV8N/A—
2010GMCSierra 1500——6.2LV8N/A—
2010GMCSierra 1500——4.8LV8N/A—
2010GMCSierra 2500 HD——6.0LV8N/A—
2010GMCSierra 3500 HD——6.0LV8N/AArena
2010GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010GMCYukon XL 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2010HummerH3————N/A—
2010SaturnSky——2.0LL4N/A—
2010SaturnSky——2.4LL4N/A—
2009CadillacCTS————N/A—
2009CadillacEscalade——6.2LV8N/A—
2009CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009CadillacSRX——4.6LV8N/A—
2009CadillacSTS——4.6LV8N/A—
2009CadillacSTS——4.4LV8N/A—
2009CadillacXLR————N/A—
2009ChevroletAvalanche————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009ChevroletCorvette—Automatic——N/A—
2009ChevroletSilverado 2500 HD——6.0LV8N/AArena
2009ChevroletSilverado 3500 HD——6.0LV8N/AArena
2009ChevroletSuburban 1500——5.3LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2009ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009ChevroletTahoe——4.8LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2009ChevroletTahoe——5.3LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2009ChevroletTahoe——6.2LV8N/ANeutral Safety Switch with Harness - Radio Capacitor
2009GMCSierra 1500——4.3LV6N/A—
2009GMCSierra 1500——5.3LV8N/A—
2009GMCSierra 1500——6.2LV8N/A—
2009GMCSierra 2500 HD——6.0LV8N/A—
2009GMCSierra 3500 HD——6.0LV8N/AArena
2009GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009GMCYukon XL 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2009HummerH2——6.2LV8N/A—
2009HummerH3————N/A—
2009PontiacG8GT—6.0LV8N/A—
2009PontiacG8GXP—6.2LV8N/A—
2008CadillacCTS————N/A—
2008CadillacEscalade————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008CadillacEscalade ESV————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008CadillacEscalade EXT————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008CadillacSRX——4.6LV8N/A—
2008CadillacSTS——4.6LV8N/A—
2008CadillacSTS——4.4LV8N/A—
2008CadillacXLR————N/A—
2008ChevroletCorvette—Automatic——N/A—
2008ChevroletSilverado 2500 HD——6.0LV8N/AArena
2008ChevroletSilverado 3500 HD——6.0LV8N/AArena
2008ChevroletSuburban 2500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008GMCSierra 2500 HD——6.0LV8N/A—
2008GMCSierra 3500 HD——6.0LV8N/AArena
2008GMCYukon————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008GMCYukon XL 1500————N/ANeutral Safety Switch with Harness - Radio Capacitor
2008HummerH2——6.2LV8N/A—
2008HummerH3————N/A—
2008PontiacG8GT—6.0LV8N/A—
2007CadillacCTS————N/A—
2007CadillacEscalade————N/A—
2007CadillacEscalade ESV————N/A—
2007CadillacEscalade EXT————N/A—
2007CadillacSRX——4.6LV8N/A—
2007CadillacSTS——4.6LV8N/A—
2007CadillacSTS——4.4LV8N/A—
2007CadillacXLR————N/A—
2007ChevroletCorvette—Automatic——N/A—
2007ChevroletSilverado 2500 HD——6.0LV8N/AArena
2007ChevroletSilverado 2500 HD Classic——6.0LV8N/AArena
2007ChevroletSilverado 3500 Classic——6.0LV8N/AArena
2007ChevroletSilverado 3500 HD——6.0LV8N/AArena
2007GMCSierra 2500 HD Classic——6.0LV8N/A—
2007GMCSierra 3500 HD——6.0LV8N/AArena
2006CadillacCTS————N/A—
2006CadillacSRX——4.6LV8N/A—
2006CadillacSTS——4.6LV8N/A—
2006CadillacSTS——4.4LV8N/A—
2006CadillacXLR——4.4LV8N/A—
2006ChevroletCorvette—Automatic——N/A—
2005CadillacSRX——4.6LV8N/A—
2004CadillacSRX——4.6LV8N/A—
Directly replaces or cross-references 5 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
1S1227824224216CSW533NS7038SW9343