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  1. 01-04.5 LB7 Duramax Powertrain
    Question for the Duramax experts. I’m aware my LB7 needs injectors or injector return lines 100% due to the Excessive amount of diesel that gets into the Crankcase. The truck has blow by when there is diesel in the oil. (not driving it) but when you change the oil and it’s not diluted it has 0...
  2. New Member Introductions
    Hey, I've been doing a lot research on my problems with my LLY... using this forum. You guys are really knowledgeable and have learned a lot. This is my first diesel and am struggling keeping up with the issues. Bought the truck a year ago and was told injectors, head gasket, studs and delete...
  3. 01-04.5 LB7 Duramax Powertrain
    Hey guys, After some advice on my lb7 I am in the process of rebuilding it and have got a new set of bosch injectors, but im not sure of which numbers i need to code them once they are in, ive seen on a few videos on other motors they come with a number on a tag but mi e have not. I have tried...
  4. Performance Upgrades
    I got a 2005 LLY duramax, basically stock except for a banks air intake. I wanna get 45 over injectors for more power and smoke but I also don't wanna tune it or get a new fuel pump. Will 45 overs be too big for that or should I get smaller ones?
  5. General Discussions
    Alright so trucks a deleted and tuned but stock otherwise as far as I know 2016 duramax. I was driving like a dickhead but nothing crazy, not pinning it or anything and all the sudden the trucks running like garbage, low on power and is puffing white smoke. I pull over and it’s like it’s got a...
  6. 07.5-10 LMM Duramax Powertrain
    I have an 08 LMM Duramax. I seem to keep getting a code for “injector leak detected” first it was cyl 3 (p02a5) I reset it after running top end cleaner through and the code came back about a week later. Upon further inspection, the fuel return line had popped out so I plugged it back in...
  7. 07.5-10 LMM Duramax Powertrain
    Hello everyone, I've read many posts and done a lot of searching, havent been able to find anyone with the same issue. Truck is 2008 cclb , have dsp5 efi live tune from Rob, love it. Also have gorend torque converter, single piece rear driveshaft, air lift bags. Truck has 300,000km and is well...
  8. 04.5-05 LLY Duramax Powertrain
    Hey guys i know this is a common issue with the LLY. My truck is a stock 2004.5 with around 200,000 miles I was pulling home from a trip and had my truck go into limp mode. After doing some research i was able to get it running good enough to finish getting home. I have replaced the number 2 and...
  9. 01-04.5 LB7 Duramax Powertrain
    My 2003 LB7 has had intermittent rough idle and white smoke, typically after extended drive time on the highway. I checked balance rates and they all seem within spec other then #7. There has been 2 bad injectors already of 8 new ones and possibly a 3rd one now. All injectors are new and have...
  10. General Discussions
    hey all, Second post here reference the first post I have solved that issue it turned out to be a fuse that was out. anyways now my issue is that my injector balance rates are kind of all over the place, for reference I'm checking the rates on the edge insight, and all of the rates 95% of the...
  11. General Discussions
    I purchased a 2006 vin 2 “LLY” lbz. Anyways 1 owner truck and previous owner said he never replaced injectors but ran Lucas with every tank. Either that Lucas worked well or he replaced injectors. This was at idle in park after driving around town. What are similar mileage trucks injector...
  12. 06-07 LBZ & LLY Duramax Powertrain
    I may be buying a lbz with 265k miles on it. Small towing tune and aftermarket trans. Injectors have never been replaced though. I have accepted that I will probably have to change them soon but for now everything is fine. Should I put stock injectors in or like 15 overs in? Not looking to...
  13. 01-04.5 LB7 Duramax Powertrain
    Need help on knowing if I am going in the right direction with my LB7. I know I need injectors and head gaskets in the truck. The truck has a cold air intake, 4" straight pipe, lift pump, and 5 position tuner. (I do not know the tunes in it) So, I am getting the complete head gasket kit...
  14. General Discussions
    Got an ‘11 LML w/ 250k miles. Has an EFI live tune and everything else is pretty much stock. All I do with the truck is tow my camper and some random miles here and there. Yesterday it just kept cranking with no start. After 15 minutes of cranking on and off it finally started and ran seemingly...
  15. 911 Problems Forum
    So this guy I know that didn’t know what he was doing tried changing his injectors on a LBZ 2007 6.6L. Now the truck will barely idle and is making an awe full noise. Getting a P0193 and a turbo underboost P0299 that was not getting prior to injector swap. Super rough idle. Any help would...
  16. Maintenance
    I have an 04 LB7 and just replaced all 8 injectors with some off brand from rock auto cause I didn’t need to pay a core charge. When I put them in, 2 were faulty. I tried to get warranty on them and the injectors are out of stock… of course. I guess my only option is to put 2 different brands of...
  17. General Discussions
    I am curious to get feedback from the community. I purchased a new 2022 Silverado HD Duramax and it finally came in after months of searching and waiting for it in transit. Anyone who’s purchased a vehicle lately understands the troubles of that in itself right now. I went to pick it up...
  18. General Discussions
    This is in drive #1 -1.4 #2 -3.2 #3 -0.3 #4 3.2 #5 2.0 #6 1.5 #7 -1.9 #8 -0.4 This is in park 0.1 -2.3 0.1 2.2 1.8 1.1 -1.4 0.3 Truck throws P0304 code And hesitates at 45 mph and stability trac light comes on Seems to run and shift fine until about 3rd 4th gear babying it Edge Pulsar v3...
  19. 11-16 LML Duramax Powertrain
    Hello, I headstudded my duramax without pulling heads using a xotic kit. Everything went well coming apart and going back together. However it was on a Sunday night and I don’t have time to finish so had a buddys shop finish putting intake stuff and harness back together. Told me he started...
  20. 11-16 LML Duramax Powertrain
    I have a problem that has gotten progressively worse over the past few weeks. I want to start this off by saying there is no check engine lights nor have I had any. The truck also has 99k miles. What started off as every so often I would notice a loss of power followed by a slight stutter then...
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