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  1. 2011-2016 (Non Powertrain)
    Hi guys. My duramax has been doing this for about a year and no one can figure it out. Runs and drives great. Daily driven, even under full throttle. Does it about half the time. Noise disappears as I drive. Has anyone heard this sound? Sounds like it’s coming from right behind the gmc emblem...
  2. 06-07 LBZ & LLY Duramax Powertrain
    Just bought a 2005 lly a few months ago. Has 150xxx miles. no tune,but has lbz mouthpiece, pcv reroute, and upgraded y bridge. When buying the truck it seemed perfect at the time, no excessive pressure in cooling system, coolant was orange, no oil mixed or anything and ran perfect. Drove the...
  3. 04.5-05 LLY Duramax Powertrain
    Gonna start this off with I’ve had this account for a year and still never know where to post these so I hope this is the right thread😥 My 05 LLY has 190k and I am used to the typewriter tick, at least I believe I am. This noise I have never heard in the 4 years I’ve owned it. Just had the...
  4. 04.5-05 LLY Duramax Powertrain
    I have a 2004.5 duramax with the lly. I just bought the truck with 130,000 on it it runs awsome but I have a knocking or clicking noise under half throttle accelerating form 55 mph. It is really bothering me and don't know wat to do if u really step in to it when the turbo spools up it goes way...
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