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  1. 07.5-10 LMM Performance Parts Discussion
    Was wondering if I could bolt on a stock LB7 or lmm turbo to 2011 LML without having to fabricate alot of pieces and parts? Any info would be appreciated! 🇺🇸 💪
  2. Maintenance
    Hello All, I am looking for a diesel shop near me in northern DE that can do a few maintenance needs for my 11’ LML. Have a leak in the valley, would like to get a quote for a CP3 conversion and an estimate on head gaskets and studs. The truck currently has 165k miles and other than the fuel...
  3. General Discussions
    Hey guys my 2012 Chevy Duramax cp4 pump took a crap recently, I had a repair shop to do the complete fuel system replacement with a cp3 conversion kit. They had apparently completed it got it home and noticed my starts hadn’t changed during the cold weather, which I’ve been told that when...
  4. 911 Problems Forum
    I recently did some work on my 16 and noticed at first drive under the boost it had the smallest air noise I thought nothing of. Than a big whoosh of air and no boost no turbo bark just a loud air leak. Anywho I did a boost leak test and I didnt have any air leaking out. My dad thinks it is the...
  5. Build Threads
    have a 2015 LML, looking to get 750+ hp out of it as a daily driver. wondering what all internally i would need to do to have is running good and reliably. bought it deleted and tuned. going to revert to the Cp3, have the fass 165gph, going to buy the 64mm vvt from duramax tuner. i’ve read a few...
  6. New Member Introductions
    What’s up everybody, just got my first diesel and always knew it’d be a duramax I am a GM guy through and through. Just introducing myself, I bought a 2011 LML for work and personal (all I do is work and take my kids to hockey) and I love it. A little freaked out about all the stuff i am reading...
  7. Exterior
    Just got a new lml duramax, but when it was getting shipped to me it had some issues. The company I used loaded the truck on backwards with the bed cover half on. This caused it to rip off, smash a couple work lights, scratch some paint on the roof, and most importantly break my drivers side...
  8. 11-16 LML Duramax Powertrain
    what’s up guys? I’ve got a 2013 duramax LML. Egr , def, and dpf all deleted. Recently blew the bellows on the y leg of the passenger up pipe near the blocker plate. Replaced the passenger up pipe with an aftermarket up pipe. After piecing everything back together, my exhaust sounds like a gas...
  9. For Sale 2015 duramax

    For Sale Section
    2015 Duramax LT trim model crew cab standard bed (6.5’) All stock besides 33” tires and on board computer monitor (EDGE EVOLUTION CTS3) tuners included but have not tuned yet. 116k miles 2nd owner can provide car fax Maintained routinely and vigorously Great interior, front seats had covers...
    $38,500 USD
  10. General Discussions
    Hey Dmax Forum, I have a 15 Sierra 2500 and I'm getting a rattle noise on decel at lower rpm from what sounds like the front drivers side fender. It sounds like metal, thin metal and I cant find what is causing the noise. It doesn't sound like an injector tick. If I had to describe it I would...
  11. 11-16 LML Duramax Powertrain
    I have a 2015 GMC Sierra 2500HD with the LML. I had a coolant level low indicator on my dash and went to check it out under the hood. The coolant reservoir was empty so I started to slowly open the reservoir cap to add more fluid. As I did it started bubbling and the coolant level came right...
  12. 11-16 LML Duramax Powertrain
    Okay, where to start... it's a 2016 lml duramax with 116k miles. It was hit (minor) and was in the shop for 2 months. Had the repairs done where I made them get the entire front end fixed (damages were only to passenger tire, and axle, etc..) anyhow I cannot seem to figure this issue out...
  13. 11-16 LML Performance Parts Discussion
    My poor def quality light came on and a friend of mine tried to run the regeneration test and scan. 10 minutes into the test it shut off and kicked the scanner out and won’t give a code or reason! We tried two different scanner tools same results any advice is appreciated!!!!
  14. Interior
    I recently bought a 2013 LML and it is deleted and Tuned. it has an h and s minimax and it won't switch performance levels. from what I understood you can switch on the fly? Mind you I am brand new to the diesel and tuning world but I'm happy to be here. Thanks
  15. Performance Upgrades
    Hi all, I'm a new user to the forum but have browsed it from time to time over recent years. I own a 15' LML (tuned and deleted) that is clocking in around 160k on the odometer now. After putting it off for the last year or so, I've decided to proceed with the CP3 conversion. I'm considering...
  16. 11-16 LML Performance Parts Discussion
    I just bought a 2016 LML and the previous owner had originally put EFI live in the truck, he then later on decided to switch to EZ Lynk, i was able to get ahold of him and he handed over the truck to me on the app, and i can see all the tunes he has for it. However when he sold the truck he took...
  17. General Discussions
    Im new on this page but was mainly looking for some information regarding a delete i want to do on my 2016 gmc sierra 3500hd any info you guys can help with i want to make sure everything is done correct and my truck has good parts installed since it is my work truck and daily use it to haul...
  18. 11-16 LML Duramax Powertrain
    Doing a cp3 conversion truck is bone stock other then a Airdog. on the feed line in the valley of the engine it has a nut that holds it together will not stop dripping i’ve tried tightening it all the way down as tight as i can get it i’ve tried re seating it and still can’t get it to stop...
  19. Exterior
    Hello, I have access to a nice ranch hand brush guard off a 2009 duramax but my truck is a 2011. How hard will it be to make it fit? I know the frames changed in 2011 but is it just as simple as changing the mounting brackets or what? TIA
  20. General Discussions
    Hey guys, Im new to the diesel world. I bought a 2015 LML last year and I am looking into doing some work too it. I want to do a y-bridge kit with 2" up pipes, 64mm turbo, cp3 conversion, and a 5" stainless straight pipe. Some parts fell off...Im just curious if anyone knows if ill need to...
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