Chevy and GMC Duramax Diesel Forum - View Single Post - 2014 lml p0420 code
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post #17 of (permalink) Old 11-26-2019, 02:21 PM Thread Starter
Los1wing
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Join Date: Nov 2019
Location: South Georgia
Posts: 33
Well they indeed replaced nbr 2 nox sensor and indeed failed after just under 100 miles. Good thing I was able to dump the trailer and gear off before taking it back to the same service center in Oshkosh.

Same codes: u029d u029e p0420 p220b these are pending and permanent codes.

Have to fly home for work so we will see how it goes in a couple of weeks.

Thanks GM, thanks EPA!

2014 silverado crew cab 2500 w/t
Manual transfercase
Rollup windows
Stock configuration
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