Fits: 2015 Chevy Silverado/GMC Sierra 2500HD/3500HD LML Duramax Diesel

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#:

• GM 19302359
• GM 19301328