My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Dorman 904-421 Nitrogen Oxide NOx Sensor for Select Chevrolet/GMC Models

(Chevrolet Silverado 2500 HD 2011-14, Silverado 3500 HD 2011-14, Express 3500 2010-14, Express 2500 2010-14; GMC Sierra 2500 HD 2011-14 + 17 more models)

Part of: Dorman Nitrogen Oxide NOx Sensor

Other options in this family: Dorman 904-6049 Dorman 904-6009 Dorman 904-422 Dorman 904-6001 Dorman 904-6023

Manufacturer

Picture for manufacturer Dorman

Part Number

904-421
6 reviews
Sale Price

$235.03

In Stock (10+)

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Dorman 904-421 is a direct replacement nitrogen oxide (NOx) sensor designed to restore proper emissions monitoring in select Chevrolet and GMC vehicles. This sensor plays a critical role in the selective catalytic reduction (SCR) system by monitoring nitrogen oxide levels in the exhaust stream, ensuring your vehicle meets emissions standards and maintains optimal engine performance.

Key Features:

  • Direct fit replacement for failed or faulty OE NOx sensors
  • Designed to meet or exceed OEM specifications for reliable performance
  • Helps maintain proper emissions control system operation
  • Prevents check engine light illumination related to NOx sensor faults
  • Rigorous quality testing ensures durability and accuracy

Dorman engineers this NOx sensor as a cost-effective alternative to expensive dealer parts, providing the same quality and reliability you expect. The sensor includes the necessary connector for straightforward installation, making it an ideal choice for professional technicians and DIY mechanics alike.

Products specifications

Fits

Chevrolet Silverado 2500 HD 2011-14, Silverado 3500 HD 2011-14, Express 3500 2010-14, Express 2500 2010-14; GMC Sierra 2500 HD 2011-14, Sierra 3500 HD 2011-14, Savana 2500 2010-14, Savana 3500 2010-14; Chrysler Town & Country 1988 + 13 more models

Finish

Plain

Color

Silver

Wiring Harness Length

920

Wire Gauge Measurement

22

Terminal Quantity

6

Terminal Type

Pin

Universal Or Specific Fit

Specific

Connector Shape

Rounded Rectangle

Package Contents

1 Sensor With Module

Connector Color

Black and Silver

Terminal Gender

MALE

Connector Gender

FEMALE

Your website made it easy for us to find what we were looking for; place the order, and kick back and wait! Thank you!

Lowest price I’ve seen. Fast and easy to place the order. Hopefully it will ship as described.

So far so good.....

Easy to navigate website

Simple silly great!

Easy Transaction, Reasonable shipping compared to many other sites.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy