Chevy and GMC Duramax Diesel Forum - View Single Post - 2014 lml p0420 code
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post #14 of (permalink) Old 11-22-2019, 06:47 AM Thread Starter
Los1wing
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Join Date: Nov 2019
Location: South Georgia
Posts: 33
Thanks. I will take your advice. My scan tool did show a percentage on the dpf at 48 to 52. That is after a normal regen. It was at 100 before the regen when the fault first came up. At my job we have protocols as well, but it is my experience that techs take the easy path. Experience also tells you what the most likely fix will be that vary from the protocol standard. Maybe my tech will have some experience on a Duramax.

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