You might assume a sensor failure is an engine-killing event, but your truck often keeps running while simply logging a troublesome check engine light. After comparing these parts and reviewing common owner feedback, I have ranked them to help you decide. I find that choosing the right replacement depends heavily on whether you prioritize factory-grade reliability or initial cost savings. Here is the honest breakdown of your two best options.
| Best For | Product | Name | Score | |
|---|---|---|---|---|
| Direct OEM Replacement |  |
NOx Sensor Fit for Chevy GMC 6.6L Diesel 2017-2019 12741484 12676706 | 9.8/10 | View on Amazon |
| Budget Conscious Repairs |  |
5WK96631G NOX Sensor for Duramax Chevy Express Silverado,GMC Sierra Savana | 8.2/10 | View on Amazon |
1. NOx Sensor Fit for Chevy GMC 6.6L Diesel 2017-2019 12741484 12676706
Owners frequently note that this unit clears persistent codes more effectively than aftermarket alternatives.
The build quality appears to be identical to the original sensor factory-installed on 2017-2019 models.
Reliability is the most common reason cited for selecting this specific OEM-matched component.
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2. 5WK96631G NOX Sensor for Duramax Chevy Express Silverado,GMC Sierra Savana
Many buyers select this option when they need an immediate, low-cost replacement to clear a dash light.
User feedback indicates that this part functions correctly out of the box for most common Duramax applications.
The lower price point is the primary factor driving interest among those managing older trucks.
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Choosing Between Them
My top recommendation is the OEM-grade 12741484 sensor for owners who prioritize long-term performance and system stability. I believe this is the most reliable choice for maintaining a 2017-2019 Duramax. For those focused on budget repairs, the 5WK96631G serves as a functional alternative that gets the job done without the premium price tag.
You should always verify your specific truck build date and engine configuration before finalizing your purchase, as minor changes can affect compatibility. Regardless of the part you choose, ensuring a proper electrical connection during installation is key to avoiding future headaches. Stick with the OEM option if you want to avoid repeating the job in the near future.
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