Fits: 2017 Chevy Silverado/GMC Sierra 2500HD/3500HD L5P Duramax Diesel

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OEM GM replacement upstream (Position 1) NOx sensor. This Nitrogen Oxide sensor is located upstream in the downpipe.

DmaxStore Note: 

• Programming required with GM scan tool or equivalent

Replaces Part#'s:

• GM 12718675
• GM 12676705