Details

• Brand:

  

• SKU:

  55515114

• Other Names:

  Injector

• Description:

  GM part 55515114 is a genuine Diesel Exhaust Fluid (DEF) Reductant Fluid Injector (also called a DEF injection nozzle or emissions reduction fluid injector). It sprays DEF into the exhaust stream as part of the vehicle's Selective Catalytic Reduction (SCR) emissions system.

  Key details:

  • GM Part Number: 55515114
  • Description: Reductant Fluid Injector / DEF Injection Nozzle
  • Replaces: 55509767 (and in some catalogs, 55494572)

  Common applications (3.0L Duramax diesel):

  • 2020–2023 Chevrolet Silverado 1500
  • 2021–2024 Chevrolet Tahoe
  • 2021–2024 Chevrolet Suburban
  • 2020–2023 GMC Sierra 1500
  • 2021–2023 GMC Yukon
  • 2021–2024 Cadillac Escalade & Escalade ESV

  Fitment depends on the vehicle's model year, engine, and emissions configuration.

  If you provide your VIN or the year, make, model, and engine, I can verify whether 55515114 is the correct DEF injector for your vehicle.

  
  

  The GM OEM Reductant Fluid Injector (MPN: 55515114) is a critical emission control component designed for Chevrolet Silverado and GMC Sierra trucks equipped with 3.0L diesel engines. This genuine General Motors part delivers precise reductant fluid injection into the selective catalytic reduction (SCR) system, reducing harmful nitrogen oxide emissions while maintaining optimal engine performance. Factory-engineered for direct fit and reliable operation on compatible diesel-powered GM light-duty trucks.

  - Emission reduction system injector for 3.0L diesel Silverado and Sierra models
  - Genuine OEM GM part manufactured to exact original equipment specifications
  - Delivers reductant fluid with precision timing for SCR system efficiency and EPA emissions compliance
  - Direct replacement for select GM Silverado and Sierra diesel trucks requiring SCR system maintenance
  - New, unused genuine GM component backed by manufacturer quality standards

• Condition: New
• Replaces:

  55494572, 55509767

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