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Chevy/GMC Duramax 04.5-05 LLY Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines

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when i drive down the highway and accelerate then decel, it constantly throws my truck into limp mode but does not show a code. i hook up my cheap code reader and hit erase it runs fine again. im told the cause is from the ... JOIN NOW TO REMOVE TRACER

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Old 03-01-2013, 11:00 PM
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Default 2005 duramax lly

when i drive down the highway and accelerate then decel, it constantly throws my truck into limp mode but does not show a code. i hook up my cheap code reader and hit erase it runs fine again. im told the cause is from the transfer case, but when i get codes there tranny codes p0746 p01174 p02563 p0700 p0763. what could be the cause?
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Old 03-04-2013, 10:57 AM
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Is trans fluid level correct? do you have a programmer on truck? Could be a problem with the pressure switch manifold, low fluid level, or trans slipping.
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Old 03-04-2013, 11:18 AM
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I know I have a transfer case seal leak not very big. And I had the ECM rest and it still did it. But I haven't noticed any slipping
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