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  1. 911 Problems Forum
    I have a 2004.5 lly duramax last night it got to -15 degrees and it started fine and ran fine for a while on the way home however it started dropping fuel pressure. I kept going for a bit then the truck just stalled and would barely start. I had it towed home and tried it this moring it started...
  2. General Discussion
    I got an 04 LB7 with 316k miles . Every so often when I’m driving around 60mph my RPMS will shoot up and then back down a second later . I got a code for water in fuel and I changed out my fuel filter and the code and check engine light went away. Today it did it again for about 3 seconds and...
  3. 06-07 LBZ & LLY Duramax Powertrain
    Current issue is my 03 Sierra sounds like its cranking strong but will never fire up. I had both batteries tested at the local parts stores and they tested good. I figured since the batteries tested good and wouldn't hold a charge it may be the alternator. It looked easy enough to get off so I...
  4. 01-04.5 LB7 Duramax Powertrain
    Let me start with saying I don't know much about diesel engines or trucks to begin with so thanks for the help ( I definitely cannot afford one of the many high dollar shops in my area since both the wifey and I are laid off due to the Coronavirus bullshit going around)! My 03 gmc 2500 duramax...
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