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  1. 04.5-05 LLY Duramax Powertrain
    2004.5 LLY Sierra 2500HD with 165k miles Lately the truck has been bogging down after sitting at a stop light and when I go to take off it'll just blow white smoke. I have to put it in neutral whomp on it, it builds some pressure and puffs out white smoke and eventually the truck will blow some...
  2. 11-16 LML Duramax Powertrain
    I posted a note yesterday for advice on removing a turbo from a 2013, now I wonder if I am chasing the right rabbit. I get the P003A error occasionally. My truck still runs pretty well when pulling a gooseneck with about 8000lbs, and when hauling a ~2000lb slide-in camper up hills in a head...
  3. 11-16 LML Duramax Powertrain
    My 2013 has been giving a P003A error regularly for several months (boost control position not learned). I can clear the code but it comes back after a few days. The dealer says the vanes are likely stuck and they want about $2000 just to tear it apart and see if that is the problem. I thought I...
  4. 04.5-05 LLY Duramax Powertrain
    My 2004.5 LLY has been a great truck for the last 104k, hopefully this is a quick fix! I have done all the maintenance and work to date, but I wanted to find out if I am on the right track for this issue? With the exception of an LBZ mouthpiece and Banks PowerPDA the truck is stock. When this...
  5. 06-07 LBZ & LLY Duramax Powertrain
    I have just replaced my CP3 pump and all seems to be fine except I have a new noise that has developed. When I put the engine under a load (like going up a good hill or hammering on it) I can hear a distinct whine. It is not normal turbo whine it sounds more like a powersteering pump low on...
  6. 01-04.5 LB7 Duramax Powertrain
    Im seriously ruling out plugged fuel filter, im gonna change it out anyways. On my way home from Denver I noticed my truck was smoking blue-ish white smoke when stopped for an extended period of time. I shut it down checked the oil and noticed it was low a little over a quart. It didn't smell...
  7. 06-07 LBZ & LLY Duramax Powertrain
    i blocked my egr without getting a check engine light which is nice but now i have a sound it sounds like turbo bark and it seems like its coming from under the hood on the passenger side approximately where the egr is.. it only sounds like the turbo barking if i get on and off it building boost...
  8. 01-04.5 LB7 Duramax Powertrain
    Hey guy I was hoping to get some good advise I'm looking into buying a Duramax. It's a 03 gmc lb7 with 130k on it it's a slt the guy had put in brand new injectors a year ago here are some of the mods INSIDE -- ARC AUDIO SYSTEM, DASH MATCHING AUTO METER GUAGES, OUT SIDE-- FRESH NEW PAINT JOB...
  9. 01-04.5 LB7 Duramax Powertrain
    Hey guy I was hoping to get some good advise I'm looking into buying a Duramax. It's a 03 gmc lb7 with 130k on it it's a slt the guy had put in brand new injectors a year ago here are some of the mods MOTOR- BRAND NEW INJECTORS, NEW HTT TURBO 64-71-13 SS HOUSING, FULLY BUILT SUNCOAST IV...
  10. 06-07 LBZ & LLY Performance Parts Discussion
    Is anyone running the GT4094VVT here? Can you give us some details on your experiences with this turbo and what to expect? I'd also like to know if anyone has ran it with a PPE program and it runs correctly with the vane position? Thanks !:rockin
  11. Turbo's Stock and Aftermarket.
    I have an 08 GMC 2500 sbcc Z71. The truck currently is completely stock as far as power mods go. Im coming out of 04 F350 with the 6.0 and that thing was straight piped and tuned and sounded amazing. Im new to the turbo swap market and just wanted to get some feedback from some veterans on here...
  12. 01-04.5 LB7 Duramax Powertrain
    This is my first diesel and I've only had it since the beginning of August, so I don't know if this is a real problem or just my imagination. The truck: I have a 2003 Chevy Silverado 2500HD, 6.6L LB7, 4x4, Crew Cab. Everything is completely stock and no tunes have been made to the best of my...
  13. 01-04.5 LB7 Duramax Powertrain
    Alright I think i'm running a wild goose chase now. I just did headgaskets in my '02 (have been back together for 1 1/2 weeks now) and i think i'm still slowly using coolant. On a cold start up I'm still getting clouds of white smoke out of my exhaust. The coolant level has dropped slightly but...
  14. 2007.5 + (GMT 900) Non Powertrain New Body Style
    Hey guys. I have a 2008 Lmm and I am looking for a solid exhaust system. It seems as though a MBRP turbo back is the way to go but everywhere I call says that MBRP does not make a turbo back for the Lmm. Also, I am worried about passing smog inspections (It says online that Alabama does not...
  15. Turbo's Stock and Aftermarket.
    Ok so there is a S366 with extended tip, 66mm inducer .91 turbine... i can't remember all the specs anyway it's $915 shipped, i found a pedastal for t4 $500 shipped, vband clamps and flanges for downpipe $35 shipped. (all on ebay and all brand new with warranty) The only "fab" work i would have...
  16. General Discussion
    annnnnnd edited.
  17. 01-04.5 LB7 Duramax Powertrain
    Hey Guys I know About the PPE Boost Valve But Im Seeing Alot Of "Pros&Cons" I Found This 1 Seems Very Practical DIY Manual Boost Controller - Honda, Acura Tech Website, tutorials, tuning and HOW-TO's. Drag racing, street racing, road racing - C-speedracing.com What Would Be The Max Boost...
  18. 911 Problems Forum
    a close friend of mine has a 03 lb7 and his truck was acting funny so i checked it out and his waste gate actuator was stuck so we pulled the rod off and checked the gate its self and its nice and smooth but out of the 3 of us no one could make the actuator rod even budge now he took it to a...
  19. 911 Problems Forum
    Have had my 07 GMC 2500 diesel to dealership three times now for engine light. They have replaced vane position solenoid and vane position sensor. Now they say I need to replace the entire turbocharger, indicating it is probably clogged with oil, due to not driving truck hard enough. Only 32...
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