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  1. EFI Live
    Thursday i loaded my tunes onto my lbz and drove it all day friday. Installed the dsp5 switch saturday morning. After the install the light on the back worked as it should. When i started it started injector knocking, hazing, rough idle, along with throwing a bunch of codes. I checked all the...
  2. 2017-19 GM T-K2 Platform Powertrain
    Hey been fighting this truck all week. Beginning of the week i was towing a 35ft enclosed trailer pretty well empty home. Got about 2 hrs from home and the truck said reduced engine power started shaking then died. Had p0087 low fuel rail pressure, a code for fuel level sensor as well as p0108...
  3. General Discussions
    I have a chevy 08 duramax and its got ripped cloth seats (non power) and i wanna do leather power seats could i snag a interior off a newer truck like a 2016 l5p?
  4. New Member Introductions
    OK, so first off this is my first diesel so bear with me I picked up the truck about 800 miles ago after checking ATF fluid I noticed that it was super dirty. I change the fluid and the spin on filter transmission is shifting great. No jerks or kicks anything like that.I also change the fuel...
  5. General Discussions
    I need help! been chasing an intermittent rough idle with no codes. occasionally my fuel rail pressure will jump around. already replaced fuel rail pressure sensor and connector. on my scanner I noticed my number 8 injection timing value is way off compared to the others. truck is stock and...
  6. New Member Introductions
    Hey there, I have been trying to figure this out in forums and through other duramax enthusiasts. I bought a 04.5 2500HD LLY Duramax back in May 240,000 KM, very clean inside and out, bought it from a dealer where i buy all my vehicles from. Anyways at the time of purchase I was told i needed...
  7. General Discussions
    The truck will shift into 4 high no problem, but won’t come back out no matter what I try. Won’t even shift into 4 low. The only way I could get it out of 4WD is to drive about 15 min then shifts back to 2WD
  8. New Member Introductions
    I bought a new 2023, 2500 Duramax HD in December 2022 about a month ago the engine light came on and the code was particulate matter sensor which I’m waiting to get that changed Monday but yesterday my engine Derated and I can only drive 20 mph, I only have 35,000 miles on it right now It sounds...
  9. General Discussions
    Has anyone done the CP3 swap to get that junk ass CP4 out of the truck? If so How Big of a Project Is It?
  10. General Discussions
    I have posted once before and no one replied, still at a loss. Here is the link for what my truck sounds like on occasion. This happens probably once every 3 days or so and drives fine, might have a stutter while driving every once in awhile as well.
  11. 06-07 LBZ & LLY Duramax Powertrain
    Hey new to the forum and semi new to duramax engines. I haven't had my 07 gmc 2500hd very long. I recently sent the injectors to injectors so-cal and had them rebuilt. When I bought the truck it had an edge programmer but I removed it when I was having injector issues thinking it may have caused...
  12. 2001 - 2007 (GMT800) Non Powertrain
    Hey y’all so I drive a 2003 6.0 vortec and stumbled upon a 2006 lbz duramax at 170000 miles my 6.0 is at 90000 what would y’all take?
  13. General Discussions
    I hate that I even have to make this post... my "current" girlfriend filled my 04 lly with gas. It gets better she then proceeds to start and drive it about 15 yards before I get a call "hey the truck just shutdown after some weird noise" 😐 so not sure what to do now. Towed it home and is...
  14. General Discussions
    Afternoon, I wanted to pick your brain, I am new to the forum and appreciate the knowledge you have. My truck started to get a P026D code I did some research on the internet and this forum, what I found was that I needed to replace my MAP sensor. Ok that was easy, I did that and the code came...
  15. General Discussions
    I just purchased a 2008 GMC, Sierra 2500 HD. It has approximately 230000 miles on it, but It is in mint pristine condition. Carfax report shows already maintenance has been done on time. And it runs like a champ. Beautiful truck. Has the 6.6 duramax diesel with the Allison transmission That's...
  16. Transmission Shop
    I have a 2002 Chevrolet Duramax LB7 w/ Allison Trans, I was towing a truck on a trailer & my truck started to slip then my transmission cooler line blew & spit out fluid, I ended up replacing the line & filling the trans correctly but now my trans keeps slipping, I took it home, ended up getting...
  17. General Discussions
    Have a 2003 lb7. No check engine light but ran the codes anyways and a C0040 code and u1000 code was on. Replaced the hub on passenger side(it had a little play) code never went away. Didn’t worry about it because it didn’t throw any lights on the dash and the hub was new. Few months later abs...
  18. 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! 🇺🇸 💪
  19. 01-04.5 LB7 Duramax Powertrain
    Howdy. Looking at a 2002 Chevy 2500 to potentially purchase and the listing has it as a no start problem. I’m fairly new to the diesel/duramax world and hoping to get some tips, potential solutions, recommended parts. Etc. The ad lists “ drove it to work one day and then went to get in it...
  20. General Discussions
    Recently put a drop in s366 fixed vane on my lbz and got tunes from duramaxtuner.com. Finished everything up and took it for a test drive. My truck will not go over 2000 rpm’s and codes p0045 and p2564. Since it is a fixed vain, what do I do with the turbo vane position sensor and solenoid? I...
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