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  1. 06-07 LBZ & LLY Duramax Powertrain
    I've got an interesting problem maybe someone can help me with, 2006 GMC SIERRA 2500HD with LBZ Duramax. idles fine and drives fine but has a misfire in lower rpms (1200-1600 that I can make go away if I plug in a coolant temp sensor that isn't actually reading coolant temp, basically tricking...
  2. 911 Problems Forum
    I've got an interesting problem maybe someone can help me with, 2006 GMC SIERRA 2500HD with LBZ Duramax. idles fine and drives fine but has a misfire in lower rpms (1200-1600 that I can make go away if I plug in a coolant temp sensor that isn't actually reading coolant temp, basically tricking...
  3. Performance Upgrades
    alright I’m looking into the edge cts3 insight or the evolution. The evolution has 5 preloaded tunes, does anyone here run an evolution and have any feedback. Or should I just do the insight and later on get the dsp5 switch with efi live? One shop I go to likes the edge evo and another one says...
  4. EFI Live
    So I was planning on upgrading to a CP3 from the cp4 but come to find out Danville went out of business so I am stuck with the cp4 tuning. I know one place but I do not want a single tune I want to keep my DSP5 switch is there anyone out there that does the OG tuning for the LML trucks? IE non...
  5. 04.5-05 LLY Performance Parts Discussion
    First post. Now have 05" LLY-88k Mi; 4" exhaust, Banks scoop intake set and six-gun tuner. Still getting slow starts with trailer (est. 10k lbs). I have a DiabloSport tuner from when I got truck new and replaced it with the Banks setup. In Colo so I can't do EGR delete and pass the smokehouse...
  6. 04.5-05 LLY Performance Parts Discussion
    Ok I’ve set everything up and made sure everything is unplugged that is supposed to and everything works until i try and set up the tuner for tuning it throws a error code 357/358 they tell me to unplug everything and update which I did! Has anybody Had this problem if so pls help or give other...
  7. Performance Upgrades
    Hey all. I’m a new diesel owner and I’m falling down the rabbit hole of modding it. One upgrade I’m looking to do is the DSP5 switch and I was wondering how it works. I know it switches between tunes but where are the tunes stored? Do I get multiple tunes programmed to the ECM? Please be gentle...
  8. Towing & Hauling
    Currently have an 09 LMM that I pull a trailer with 5k-9k everyday. I am looking for recommendations for the best tuner for efficiency and longevity. Most people seem to push efi live but who still pushes out good tunes for it.
  9. EFI Live
    I have a 2012 LML I just purchased a truck used it has a five position under the dash with yellow and black wires running right to the ECU not too sure what tunes are on it or whoever made the tune is there a way I can figure this out
  10. New Member Introductions
    I have been viewing this forum for a while doing my research on what to buy for my first Duramax. Long story short I chose an LBZ because I really couldn't go any newer(price mainly) and that it is pre-emission. I have read mostly good things about the LBZ and that it is mostly more reliable...
  11. For Sale Section
    Hello, I have a few items for sale.. 1. Black Bear Performance Autocal. I purchased back in 2016 for my 2015 Silverado 5.3 and sold the truck last December and never even opened it. Not sure what years it will work for, I know it covers several years. Asking $300 shipped. 2. Carhartt Seat...
  12. EFI Live
    Hey guys, so im new to the diesel/tuning world, and i own an '06 lly duramax which basically is an lbz with the lly tuning from what ive researched. I am looking into some efi live tuning, and im trying to calculate how much of a horsepower gain i can get with the tunes, and im trying to see if...
  13. Aftermarket Mods.
    Hello all 👋🏼, I’ve got a 2016 GMC 2500Hd that I’ve had for a year and am now wanting to do a full delete. Who is a recomendable tuner? Contacted PPEI for an ez Lynk but said they don’t offer emissions removed tuning anymore. Who are you guys using?
  14. EFI Live
    Hey guys I do have a Duramax, but this question is for my brother and his '04.5 LLY GMC. He has EFI Live and the Edge Monitor, He set his tune to 5 and was driving and the screen went black, he said a new screen is around $700 or so, but my/his question is, is there a way to change his tune back...
  15. EFI Live
    Hello, first post here. Bought a 09 LMM Silverado a couple weeks ago, my first Duramax. Previous owner has some tunes on it with a DSP5, only info he could give me was that each tune would progressively add more power. He claimed the first one above the stock one was 500 hp and the highest one...
  16. General Discussions
    I currently have a dps5 switch and about 700hp on mostly stock equipment. I drove truck with intercooler disconnected. Not knowing it would damage something. It smokes heavily now. So i already had collected parts; 68mm cheetah turbo, 200 over injectors and stroker cp3. A few yrs ago. Since the...
  17. EFI Live
    I just recently had some work done to my LLY. It has regular ol EFI live with a DSP5 from Kory Willis. I’m looking to change up my tunes. Unfortunately the tunes were uploaded via laptop and my tuner doesn’t have my stock tune on file. I’m looking to upgrade to an autocal, that way I always have...
  18. EFI Live
    I need help I’m new to the diesel world. I bought a 2014 gmc 2500hd that was already tuned with a H&s mini maxx but the previous owner didn’t leave the mini maxx with the truck so I was wondering if I buy a new mini maxx and install the tunes would it fry my Ecm since it’s not the original one...
  19. 11-16 LML Duramax Powertrain
    So I just bought the Fleece 750 10 mm stroker cp3 pump and a wehrli race conversion kit and keep reading some things with tuning required and some without tuning required... what’s the real story? Am I going to have to take this by a shop or just message one of the techs on my ezlynk? Don’t...
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