Details

• Brand:

  

• SKU:

  24001899

• Positions: Lower
• Other Names:

  Sensor

• Description:

  🔧 GM Part #24001899 — what it is

  GM 24001899 NOx Sensor (Lower / Position 2)

  • Official name: Nitrogen Oxides (NOx) Sensor — Position 2 (lower)
  • System: Emissions / exhaust aftertreatment
  • Type: OEM GM electronic sensor

  ⚙️ What it does

  This sensor:

  • Measures nitrogen oxide (NOx) levels in the exhaust
  • Sends data to the ECU to:
    • Adjust fuel/air mixture
    • Control DEF (diesel exhaust fluid) injection
    • Keep emissions within spec

  👉 Basically, it’s critical for modern diesel emissions systems (DEF/SCR).

  🚗 Common fitment

  Mainly used on 3.0L Duramax diesel (LM2) trucks:

  • 2020–2022 Chevrolet Silverado 1500 (3.0L diesel)
  • 2020–2022 GMC Sierra 1500 (3.0L diesel)
  • Mounted in the exhaust system (downstream / “position 2”)

  🔁 Replaces / supersedes

  • 12680340
  • 12694399
  • 12696464

  ⚠️ Important notes

  • Programming/reset may be required after installation
  • Failure can cause:
    • Check engine light
    • DEF system warnings
    • Reduced power / limp mode
  • Not interchangeable with upstream NOx sensor (they are position-specific)

  👍 Bottom line

  • 24001899 = lower NOx sensor for 3.0L Duramax diesel
  • Monitors exhaust emissions and works with the DEF/SCR system
  • Common failure point on newer diesel trucks

  If you want, tell me your exact truck (year + engine), and I’ll confirm:

  • upstream vs downstream sensor
  • or help you diagnose if this is actually the one that failed 👍

  
  

  # GM Nitrogen Oxides Sensor - MPN 24001899

  Upgrade your Silverado or Sierra's emissions system with the Genuine GM OEM Nitrogen Oxides Sensor (MPN 24001899), engineered to detect exhaust nitrogen oxide content and optimize your vehicle's emissions performance. This original equipment manufacturer sensor is specifically designed for 3.0L diesel engines and meets GM's strict OE specifications for reliable, long-lasting operation. Perfect for truck owners seeking genuine replacement parts that maintain factory performance standards.

  - Nitrogen Oxides (NOx) Sensor designed for GM Silverado and Sierra 3.0L diesel engines
  - Genuine OEM part manufactured to GM factory specifications for exact fit and function
  - Detects nitrogen oxide levels in exhaust stream to optimize emissions control and engine efficiency
  - Compatible with select GM light-duty trucks requiring Position 2 sensor configuration
  - Original equipment condition; requires professional installation and GM-recommended programming procedures for proper vehicle operation

• Condition: New
• Replaces:

  12680340, 12694399, 12696464

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