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Old 06-29-2021, 12:00 AM   #2
voltdr
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Join Date: Jan 2008
Location: Texas
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Default Re: Duramax towing “engine reduce power”

Does it give any DTC codes? Mine did it and I would get "low pan rail pressure". I tried everything, lift pump, relief valve. The only thing that fixed it was replacing the injectors. I know that's not what you wanted to hear but I fought it for awhile before replacing the injectors.
Dan
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Dan Foley
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