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  1. General Discussion
    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...
  2. 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...
  3. 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...
  4. 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!!!!
  5. 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
  6. 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...
  7. 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...
  8. General Discussion
    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...
  9. 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...
  10. 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
  11. General Discussion
    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...
  12. General Discussion
    Trying to find out if anybody can help, i have a 2014 lml duramax that started to misfire and run rough. Replaced injectors but was still recieving an engine code for cylinder 1 misfire. Replaced the injector pigtail harness because i read that sometimes they can go out do to a sharp bend or a...
  13. 11-16 LML Duramax Powertrain
    I have searched and not found anything that helps my issue specifically. I have 2013 chevy 2500 LML, full delete with efi live from PPEI and upgraded TCM from Dans Diesel. Truck has 200K on it now and has started acting up intermittently with service stabilitrak/traction control and going into...
  14. Exterior
    Hey everyone, I have a 2016 Duramax, and need a new set of tow mirrors for it (I cracked the LED strip on the passenger one). These things have that stupid sensor in the passenger mirrors, so I was wondering if anyone knows a website with the best price on a set of them? I’d rather just go ahead...
  15. General Discussion
    Hey everyone! So my lml got deleted two or so years ago and when it first for deleted and tuned it used to roll coal a decent amount. (Not trying to roll coal to be cool) but now on tune 5 it’s just a slight haze! fuel pressure is where it should be, but it kinda weird it stopped rolling coal...
  16. General Discussion
    I have a 2015 Duramax LTZ Dually with 317k miles that was deleted around 280k. Never really had any issues with the truck. I left the truck idling in the driveway for about 45 minutes and when drove off it took forever to accelerate to 40mph no check lights or traction control lights are on...
  17. 911 Problems Forum
    So i just installed a drop in stealth turbo from duramaxtuner and had my injectors re-nozzled to 100% over. Let me start off by giving some background, the truck is fully deleted with dual sportsman cp3’s and a fass 150 on the fuel side. The factory fuel filter housing has been deleted! After...
  18. 11-16 LML Duramax Powertrain
    Hey y'all! Got a question on the lml fuel system So I replaced the engine in a 2015 lml with a 100k mile engine. It cranks but wont start and while cranking rail pressure only shows 260-300 ... I can start it with starting fluid (I know I'm not supposed to) but it'll run on fuel if I keep it at...
  19. 11-16 LML Performance Parts Discussion
    Hey everyone, New member to the forum but have been creeping since I bought my 2015 GMC Denali 2500HD back in October of 2014. I finally pulled the trigger on Improving my trucks performance after 138K miles. I purchased ecm & tcm soft tunes, passenger up-pipe, MBRP downpipe, 5 inch straight...
  20. Towing & Hauling
    I have been doing my Research on this truck for a while now, but maybe it’s the lack of not knowing. I have a B&W gooseneck hitch already installed in the truck I’m trying to find the max pin weight that I could put in the back? Looking at buying a toy hauler? If anybody could give there opinion...
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