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  1. Duramax First Generation: 2001-2004 (LB7)
    Ok truck runs great. Injector rates are normal or what you would call inspect at idle and it never smokes. But once in drive and idling 3 injectors goes way up. I can drive and it won’t smoke. But if I get down on it it blows white smoke everywhere. See the first two on the left and first on...
  2. Duramax First Generation: 2001-2004 (LB7)
    Put brand new injectors in (reman) and fired it up and it runs like ****. white smoke misfires no power. It runs bad. Injector rates are crazy heres a picture. They don’t move they just stuck at these rates. If I tap gas they move but goes right back to these rates. I also have code P0090...
  3. Duramax First Generation: 2001-2004 (LB7)
    I have a 03 dmax federal lb7 I replaced the HG and 1 new injector because I broke the terminal. In the beginning 2 injectors were reading balance rates of +15 while the rest were reading -7 I continued to drive it because I was running injector cleaner threw it and at the time the rates clears...
  4. Duramax First Generation: 2001-2004 (LB7)
    What would cause one bank of injectors to be out of limits while the other bank of injectors remains within limits readings? Background All the injectors were replaced in Jan 2020 with Lincoln Diesel Specialties SACOO injectors. Installed an Air Dog 100 in Jan 2020 Notice the truck was running...
  5. Duramax First Generation: 2001-2004 (LB7)
    I have a 2003 Silverado 2500HD Duramax. 222K miles. Bought it at 160k miles. Engine smoking now. Finally found a shop to replace injectors. $4500 - 4800 cost, Labor hours are 12. Labor cost $115. Only injector replacement, SAC00, no rails, lines or valve cvr bolts. They are extra. 12 mo...
  6. Duramax First Generation: 2001-2004 (LB7)
    So after trying to find answers myself I decided to ask here and hope for the best. To start off with I have owned a Duramax truck in some form since 2002. I had my 2002 GMC from new until last fall 2021. It was actually a little hard to sell it because I was a bit attached to it. I have also...
  7. Duramax First Generation: 2001-2004 (LB7)
    Hi ... if anyone knows where to buy LB7 injector valves? F00RJ02005 I am asking for help if someone has it or if someone knows where to buy I am only interested in ORIGINAL I do not want replacements
  8. Duramax First Generation: 2001-2004 (LB7)
    Hey fellas, new here and just wanted to add something on “injector replacement thread.” I was worried about a specific part of the job and came across this group reading throw multiple comments to see what everyone else 2 cents on the topic are. Ok, so I broke old red down in the driveway Jan...
  9. Duramax First Generation: 2001-2004 (LB7)
    I have read many of the posts on this and wanted to try cleaning injectors with the AcDelco Upper Engine Cleaner but can’t find any around. Dealers all say it’s discounte, I would buy off someone if they have any. Is there anything else that I can use like Sea Foam maybe?
  10. Duramax First Generation: 2001-2004 (LB7)
    Alright, another lb7 injector question. I have a 2002 Chevy Silverado 2500hd with the lb7 Duramax and 130,000 thousand miles, s&b cold air intake, bigger/louder exhaust, but stock fuel pump and filter set up. My truck does have some sort of tuning: setting one = stock two = tow heavy three =...
  11. 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...
  12. Duramax First Generation: 2001-2004 (LB7)
    I have a 2003 2500HD LB7 / Allison rig that I've been told needs injectors. As I'm not super mechanically inclined, it's confusing enough already (not to mention painful$$), but one thing I want to be sure of is to replace everything I should logically replace at the same time. It seems like...
  13. Duramax First Generation: 2001-2004 (LB7)
    This is just a story that I hope helps someone in the future. Yes I have an agenda, but I think it is information like this that makes sites like this one valuable to us enthusiasts. Please read the entire post to get the full story - I don't want to mislead anyone about the products and...
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