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  1. 911 Problems Forum
    Looking for any tips to diagnose this issue with my 2005 3500 LLY. Little while back I noticed a slight injector knock between 1700-2100rpm. I have since replaced the fuel filter, all 8 glow plugs (3 were toast) and replaced all 8 injector harnesses. The truck started to generate more power and...
  2. 04.5-05 LLY Duramax Powertrain
    So I have a 2005 LLY Duramax crew cab and I’m new to the Duramax diesel world and I’ve only owned the truck since October 2019 til now and the truck just turned over 205k miles. Now my question is, would a leaking injector return line cause injector knock? The passenger side, #7 injector, return...
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