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DmaxBranman

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  1. Hey all first post here . I have a L5P duramax . It’s a year old. It’s super hot here last 2 weeks but I have noticed a loud hissing sound coming from near the fuel tank twice . Once during a “cold start” and once after some driving . I was wondering if this is something that’s normal. I used my Banks monitor and scanned the system for codes , nothing. Thanks ! Sent from my iPhone using Tapatalk
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