Home› Electrical, Lighting and Body > Electrical Connectors› Standard Ignition S2500 Nitrogen Oxide (NOx) Sensor Connector
Standard Ignition S2500 Nitrogen Oxide (NOx) Sensor ConnectorOE Quality 60-Day Returns
Part #: S2500

Standard Ignition S2500 Nitrogen Oxide (NOx) Sensor Connector

52 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$57.86Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet and GMC, Express 2500, Express 3500, Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? See all Nitrogen Oxide (NOx) Sensor Connector options

Standard Ignition S2500 NOx Sensor Connector

The Standard Ignition S2500 is a direct replacement nitrogen oxide sensor connector for repairing damaged electrical connections without replacing the full harness. It uses a female square housing with 6 female pin sockets and 6-wire routing for a clean OE-style repair on select Chevrolet and GMC diesel applications.

Key Features

  • Direct replacement NOx sensor connector for electrical repair
  • Female connector with square housing
  • 6 female pin sockets with 6-wire configuration
  • Protective tubing included for added wire protection
  • Housing made from polyamide resin for durability in harsh environments
  • Terminals use high-grade copper alloy, brass, and phosphor bronze materials
  • 100% tested for mechanical and electrical fit, form, and function

Detailed Description

Standard Ignition S2500 is built for technicians replacing a damaged nitrogen oxide sensor connector at the downstream air injection pump check valve placement. It is a direct replacement electrical connector that restores the connection point without requiring a full harness replacement, helping keep the repair focused and cost effective. This part cross-references 13578974 and EC2411 for the same application. Standard Ignition S2500 is a practical choice for Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, and other listed GM truck and van applications.

Common Repair Uses

  • Broken or heat-damaged NOx sensor connector housing
  • Corroded or loose terminal connection at the sensor plug
  • Intermittent electrical signal caused by worn pin sockets
  • Harness damage limited to the connector end
  • Failed downstream air injection pump check valve connector repair

Installation Notes

Verify connector shape, terminal count, and wire count before installation. Match the existing vehicle-side connector and confirm the downstream air injection pump check valve placement on the listed Chevrolet and GMC applications. Inspect adjacent wiring for heat, abrasion, or corrosion before completing the repair.

Quality Assurance

Standard Ignition tests these electrical connectors for proper mechanical and electrical fit, form, and function. The S2500 uses durable materials selected for long service life and reliable performance in demanding underhood conditions.

BrandStandard Ignition
Part NumberS2500
Connector GenderFemale
Connector Quantity1
Connector ShapeSquare
Terminal GenderFemale
Terminal Quantity6
Terminal TypePin socket
Wire Quantity6

This part fits 52 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2016ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2016ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2016ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2016ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2016GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2016GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2016GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2016GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2015ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2015ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2015ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2015ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2015GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2015GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2015GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2015GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2014ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2014ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2014ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2014ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2014GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2014GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2014GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2014GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2013ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2013ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2013ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2013ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2013GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2013GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2013GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2013GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2012ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2012ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2012ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2012ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2012GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2012GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2012GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2012GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2011ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2011ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2011ChevroletSilverado 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2011ChevroletSilverado 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2011GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2011GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.
2011GMCSierra 2500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2011GMCSierra 3500 HD6.6LV8N/ADownstream air injection pump check valve placement.
2010ChevroletExpress 25006.6LV8N/ADownstream air injection pump check valve placement.
2010ChevroletExpress 35006.6LV8N/ADownstream air injection pump check valve placement.
2010GMCSavana 25006.6LV8N/ADownstream air injection pump check valve placement.
2010GMCSavana 35006.6LV8N/ADownstream air injection pump check valve placement.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

13578974EC2411PT2484PT2621

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.