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  1. 11-16 LML Duramax Powertrain
    Hey guys, I’ve searched and searched for answers to my issue. A few topics have touched on it but to no avail have i found a solution. Hoping for some insight/brainstorming. Thanks in advanced. Truck: 2011 lml duramax, fully deleted (block off plates), running efi live stage 1, Cat filter...
  2. 01-04.5 LB7 Duramax Powertrain
    Hey guys, I need some help diagnosing this strange new thing that my 2002 LB7 is doing. As the temps began to drop below freezing I started plugging in my block heater. It would start up fine, no smoke at all. But then upon the first acceleration of the day it’ll blow a decently big cloud of...
  3. General Discussion
    So here I want to address the 07 duramax lbz. I’m curios on if there was ever a solution to staying out of limp mode without using diodes. I’d prefer to not add diodes, but if anyone has an updated more informative diagram I’d be grateful
  4. General Discussion
    Hey guys I’m new to the duramax scene I recently picked up a 2007.5 Sierra 2500hd 6.6 when I first got the truck it had a clogged dpf and overboost codes so I had my friend who’s a diesel tech start working here’s a list of what’s been done -rebuilt turbo (the vien plate had a hairline crack...
  5. 01-04.5 LB7 Duramax Powertrain
    Hey there fellas I’m pretty new to the Duramax gang and need some guidance before I throw any more money at the wrong issues. I recently purchased a used CA 2002 Chevy 2500 short bed crew cab 4WD with 180,000 miles from a local dealership and didn’t have any problems when I was test driving...
  6. 01-04.5 LB7 Duramax Powertrain
    drives fine, runs fine, sometimes surges at idle and when it does small puff of smoke out of tailpipe with the surge, surge is intermittent, mileage fine, no fuel in oil, no check engine light, ANY IDEAS?????????
  7. 01-04.5 LB7 Duramax Powertrain
    Im new here and first time posting. I tried searching but still wasnt for sure so i thought i would just ask. I have had a 2003 ccsb for about a month now. Since i bought it it has had a slight surge in idle, and little puff of smoke on start up and idle sometimes. No loss of power or loss of...
  8. 01-04.5 LB7 Duramax Powertrain
    So I got all the injectors out waiting on my new ones (suppose to be here day after tomorrow) any hints or ideas on the first steps i need to take BEFORE i try turning it over for the first time? I have a new filter on and all that jazz but how do I prime these bad boys? IM NERVOUS lol this has...
  9. Maintenance
    New Here, Thanks to all of you who contribute to this site. It helped me fire up the truck I bought. Now I have a new problem and after running a quick search, I couldn't find anything relevant to my situation. The truck was running fine until I noticed it getting sluggish. The RPMs started...
  10. 06-07 LBZ & LLY Duramax Powertrain
    Hi Guys, I am a new member with a 06/07 express cut away with a four winds RV. It has an LLY and and Hydromatic. I live in Australia. Love the truck but nobody here knows anything about it. It has done 5000 miles from new and has 3 issues. First -Engine warning light on dash that has been on for...
  11. 01-04.5 LB7 Duramax Powertrain
    02, upgrades, banks six gun, cold air intake, and exaust. 375k miles. Replaced injectors (all 8) twice, once at 199k, then at 275k. Replaced rail system as well. Recently, truck began smoking, gray, at idle. Just smell at first, then smoke. Picked up MAFS code. Replaced, cleared code...
  12. 01-04.5 LB7 Duramax Powertrain
    I am new to the diesel side of things and I got an 03 duramax about 6 months ago. It started to blow white smoke after working hard towing my dune buggy around. I brought it in to the dealer and they said that cyl. 7 injector has a high balance rate and needed to be replaced. I decided to just...
  13. 911 Problems Forum
    I bought a 2002 duramax with a blown motor, I bought a motor for it out of a rollover that seemed to run fine when I went and looked at it but now that its in my truck it has no power and smokes like crazy-grey smoke at idle and black on acceleration. At first I though it would be the common...
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