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lb7 no start
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  1. Duramax First Generation: 2001-2004 (LB7)
    I tried priming with the screw and it didn't help need this truck for work anyway I can get it back soon?
  2. Duramax First Generation: 2001-2004 (LB7)
    I’m lost here, 04 lb7 replaced 2 and 4 due to black smoke and both ranging from 6.2-7.0 in the balance rates. Everything went as smoothly as you could expect with this job. Put everything back together went to prime pumped and pumped. My hand and shoulder are literally sore from pumping for hour...
  3. Duramax First Generation: 2001-2004 (LB7)
    First post here. I've had my 03 LB7 for the last 3 years with little to no problems. It's sitting at 267xxx miles now, so its had the injectors done a few times, most recently a year ago. About 3 months ago it randomly wouldn't start. No crank, no start. All electrical was functional when in...
  4. Duramax First Generation: 2001-2004 (LB7)
    I’m hoping somebody can help me here as I am a bit stuck, I’ve only ever owned cummins and this is my first duramax and I am stumped. I have an 01 with 220,xxx. I put new injectors in and they have around 20k on them. A couple months back I drove the truck to work, shut it off, and it wouldn’t...
  5. Duramax First Generation: 2001-2004 (LB7)
    Lb7 2004 no start no crank after driving it if it sits for a hour it’ll fire up no problem battery’s are good when it enters the state of no start I can jump the starter or the relay and turn it over but will not start until sitting for a hour and whenever I get it started I can turn the truck...
  6. Duramax First Generation: 2001-2004 (LB7)
    I got a 2003 lb7 duramax with 320000 on it, I’m having a weird problem with it. When it sits say a day or two it fires up without a problem but when I shut it off after even 20 seconds of it running it will only crank and not start. When it sits the desired fuel rail pressure and actual fuel...
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