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Emission recall

gerald compton
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gerald compton Enthusiast

gerald compton

Posted
Posted

got a letter from gm saying my 2020 3/4 duramax, has a voluntary emission recall, saying may employ higher than necessary temps to clean DPF filter during regeneration. 

Was wondering if anyone else had had this work done. 

Njmurvin Enthusiast

Njmurvin

Posted
Posted

I had it done on mine about a month or so ago.

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  • 3 weeks later...
Libertized Enthusiast

Libertized

Posted
Posted
On 6/19/2022 at 3:11 PM, gerald compton said:

got a letter from gm saying my 2020 3/4 duramax, has a voluntary emission recall, saying may employ higher than necessary temps to clean DPF filter during regeneration. 

Was wondering if anyone else had had this work done. 

I got it done and it has jacked up my fuel mileage substantially. Lost around 4mpg and I’m pissed. GM won’t revert it back either. 

Libertized Enthusiast

Libertized

Posted
Posted

Has anyone else experienced a significant reduction in mpg since this recall update? Does anyone have an answer as to how to revert or fix? 

XY74 Enthusiast

XY74

Posted
Posted

As posted in the other thread, a few had that issue at first and then returned to normal.  If you are just going off that tank,  remember they burned up a fair amount of fuel going nowhere when they did the update and had to force a regen.

 

Njmurvin Enthusiast

Njmurvin

Posted
Posted

Others reported a "shaking at idle" along with the reduced fuel economy. Mine has a slight shake that it didn't have before the update.

Hilltopperfister New Member

Hilltopperfister

Posted
Posted

Quick question, I had the recall done and now I have had to replace my NOx sensor twice in 2 weeks. Engine code p22FB. Anyone have any ideas. The dealership has zero clue what is going on and I am don’t sitting there for 5 hours while they troubleshoot. 

  • 1 month later...
Duramax 1 New Member

Duramax 1

Posted
Posted

I had the update done a few weeks ago. I got the truck back with a rough idle. I read up on it and found that it needs a small quantity injector reset. I did this with a friends scanner since I did not want to deal with taking it to the dealership again. This smoothed it out and back to normal. I did lose MPG and also today got a p22fb code. If I had a choice I would not do these updates as my truck is a 2020 that I have owned for 3 years without any issues until the updates. 

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