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

Straight pipe

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Old 02-04-2010, 01:40 PM
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Default Straight pipe

My buddy has an 05 and is wondering if he can run a straight pipe. I know on the new trucks they will throw codes but not sure about his.
 
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Old 02-04-2010, 02:11 PM
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i have an 04 lly and i am running straight pipe (no cat and no muffler) and i havent thrown any codes.
 
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Old 02-04-2010, 03:35 PM
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Some of them will throw a P0401 code when straightpiped.. a fingerstick or PPE Tuner can block those.. Its an easy fix it if does show the code. Some trucks do and some dont.
 
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Old 02-04-2010, 05:58 PM
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Thanks guys I will let him know.
 
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