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lb7
21-40 of 126 Results
  1. Exterior
    My Duramax started to whine yesterday on my way home. I have a loss of power and the whine increases with my rpms. Any advice or help on what the problem could be? I am concerned its my turbo. I have a video showing the sound but I can't seem to attach it to the post.
  2. Gauges, Electronics and Wiring.
    So intermittently my truck will have a huge kick back (like a really rough shift), and then the gauges will go all over the place and my doors will just keep unlocking and locking constantly, my screen/display for my tuner turns off, and sometimes i lose power to the accelerator. After replacing...
  3. 01-04.5 LB7 Duramax Powertrain
    So I relashed valves on drivers side the noise in my intake went away and today it popped back up today seems quieterAfter valves Before valves After valves After valves please watch and let me know I’m hopeing the truck is fixed it runs really nice now just worried it’s not running properly still
  4. 01-04.5 LB7 Duramax Powertrain
    Hey I know this is a long shot but I have a problem with my lb7 that I can't figure out the problem to I've researched alot and can't seem to find the problem so instead of taking my truck to the dealer I thought I'd reach out to you.... I haven't driven the truck in a while but I went to start...
  5. 01-04.5 LB7 Duramax Powertrain
    Hello everyone, first time posting here. I recently have been having issues with my gauge cluster, typical GM issue I know but there is some odd issues I have encountered My fuel gauge has not worked since I picked up the truck about a year ago, I got a rebuilt o”cluster the other day to try...
  6. 01-04.5 LB7 Duramax Powertrain
    A 2004 lb7 GMC 2500 crew cab short box has just come into my possession, before I got it the front differential didn't disengage and blew the u-joint in between the front driveshaft and the t-case. That sent the driveshaft flying around and it smashed the trans at 120 kph breaking the shift...
  7. 01-04.5 LB7 Duramax Powertrain
    hey everyone hope someone can help me out here, so I have an 02 lb7 with 515,000km on it, and I get excessive smoke when I’m idling once truck is up to temp when it’s cold no smoke at all except on start up black or white smoke. it’s not losing coolant levels stay the same, oil is always at the...
  8. 01-04.5 LB7 Duramax Powertrain
    Sup guys I have an 02 Lb7 with a new motor and a couple mods, pretty reliable rig. Recently I have been seeing balance rate fluctuations on my injectors that make no sense. I keep a close eye on injector #8. Throughout the day, I’ll see My injector climb all the way to +15 while in park, and...
  9. 01-04.5 LB7 Duramax Powertrain
    I am trying to troubleshoot a miss in my 2003 GMC Sierra 2500HD LB7 ZF6 NP261. It has an intermittent problem at lower and higher constant speeds where it will hesitate and you can hear the clutch unload/reload. The motor was completely rebuilt 20,000KM ago. The injectors are 50,000km old and...
  10. 01-04.5 LB7 Performance Parts Discussion
    Ok so it’s an old truck but it’s got 50k miles on it and it’s clean as hell. Like probably the cleanest I’ve had and that’s saying something. I’ve done a few small things but nothing like what I’ve done to my others. It’s a 2003, I’m gonna do my best to not go crazy with it but.......it’s hard...
  11. Introductions
    just recently copped my dream truck I absolutely love it and I find joy in learning more about diesels. Here’s what I know is done to it from a performance stand point: almost everything on replaced but too much to list Brand new 6.6 Jasper Duramax Motor (ARP studs) -Upgraded Crank Shaft -Built...
  12. General Discussion
    Hey so I sold the lbz and got a 08 lmm mods that I can tell are lift pump,def delete 4” exhaust, and a dmax store Idaho rob autocal trucks 6” rcd lift on 35s getting 15mpg or 380 miles to a tank cruising I’m not sure the time is flashed because I bought it this way has a dsp5 and the autocal...
  13. 911 Problems Forum
    Hey guys new member here . I bought a lb7 with a knock along with a lope and surge at idle . The truck has no blow by or smoke out the exhaust . I did a oil change and swapped out the filters along with a new fpr . It still has the same issues . Previous owner told me he did the injectors cp3...
    lb7
  14. Parts For Sale
    Sold
  15. Duramax Engine Swaps
    Hello, i have a 02 LB7 Complete parts truck. i want to swap it into my 2005 GMC Duramax, what am i looking at needing for this? the LB7 is freshly rebuilt bigger injectos turbo mods headgaskets, etc no blow by. what's the easiest way to do this swap? and what will i need
  16. 01-04.5 LB7 Performance Parts Discussion
    I’m sure there’s a thread started on this but can’t seem to find a decent one. My buddies want me to go to the track with them (all have 13.5-15.0 cars) because they haven’t been before and I have. Instead of bringing my 11 second corvette I was thinking about bringing my duramax and possibly...
  17. 01-04.5 LB7 Duramax Powertrain
    Hey guys, yesterday i was headin to work in my 02 duramax and my truck revved up and i think it came outta 5th gear and into 4th and the service engine light came on. I was going about 65 on cruise, and i hit the gas to accelerate to go around this car and thats when it happened. Any ideas? to...
  18. 01-04.5 LB7 Duramax Powertrain
    Hello fellow dmax owners. I recently bought a 2002 Lb7 duramax with the zf6 transmission in it. While tearing into the motor I noticed that majority of the push rods were bent. I checked the cam gear pin and the crank and they are both in good shape. Could the valvetrain failing cause all the...
  19. Looking For/ Wanting To Buy
    Looking for an intake for my lb7. Would like to find a wc fab but let me know what you've got
  20. VIN Check
    Hey guys, happy to be apart of the duramax family. Ive owned a couple 2nd gen cummins but now got into a duramax lb7. Its a 2003 body, interior is great shape, lots of new parts and has had work done but i saw some posts about being able to vin check to see a bit more what's been done. I know...
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