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  1. 11-16 LML Duramax Powertrain
    Hi guys. My lml has been making this sound for about a year now. It doesn’t do it everytime I drive it, but when it does it’s after the truck is warmed up. Runs and drives perfectly. No one can seem to figure it out was just wondering if anyone has heard this before. Coming from right behind the...
  2. 06-07 LBZ & LLY Performance Parts Discussion
    Not sure if this is the correct place to post, especially for my first post, but oh well. I have a 2007 LBZ That I recently blew the orings out of the y bridge Elbow. I ordered an HSP y bridge kit and installed last night. It was a PITA removing the old and installing the new, but it’s in. I’m...
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