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Old 06-08-2012, 01:06 PM   #1
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2009 Chevy Silverado Duramax - Engine Reduction Mode

Anyone else have the same setup getting the same error?

Ours keeps coming back as fuel related, we've had a ton of work done to try to correct the issue.

I'd like to hear from other Duramax owners out there.

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Old 06-09-2012, 09:12 PM   #2
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You might get more response if you post your question on the Duramax Forum at Chevy and GMC Duramax Diesel Forum


Retired electronics engineer. Avid paddler & birder.
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Old 06-10-2012, 11:59 PM   #3
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How long since your last fuel filter change? 15,000 miles is the max.for a filter. I have seen rubber fuel lines that collapse inside when the engine is running at speed, yet the outside appears new. In the 90's Dodge diesels had a problem with that.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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Old 06-11-2012, 06:33 PM   #4
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Knock on wood, I've never had that type of error error message appear on my '09. I know the Duramax LMM engine will go into reduction mode if the DPF becomes too clogged. However, this generally happens as a result of ignoring the warning message (and alarm) to run the truck for about a half-hour at 30+ mph to allow the engine to burn it off.

Personally, I agree with the previous poster. You might do better to post your problem on a Duramax diesel forum.
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Old 06-11-2012, 06:41 PM   #5
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I haven't had that error code but I've had a current issue with the oil level % dropping quickly in the computer. They said its from too many short trips but that will be fixed soon since I have a road trip to North Carolina coming up so that should open it up.
07' Chevy 2500 ext cab/long bed Duramax
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