Chevy and GMC Duramax Diesel Forum banner

lmm

  1. Lmm died randomly

    911 Problems Forum
    So today while driving my LMM after driving about 150 miles I pull into a parking lot and the truck just died and then I try to start it back up and started to crank with the key for a couple seconds and then after that the key did nothing The primer on the fuel bowl was soft and I pushed it a...
  2. 4x4 Problems

    General Discussion
    I just recently picked up and 08 Sierra LMM, but I’m having trouble with my 4x4. The indicator takes a while to say its in 4x4, but it engages the transfer case just fine and spins the front drive shaft. I also replaced the actuator on the front differential, but it’s still not working, and I...
  3. WTS GMC 2010 2500HD SLT CCSB LMM low miles **SOLD**

    Vehicles For Sale
    2010 GMC Sierra 2500HD Crew Cab SLT With 6.5' bed. DURAMAX DIESEL!!! I am the original owner, bought new in February 2011. Low 79,100 Miles, lots of long distance highway driving. Adult owned, meticulously maintained with premium filters and all synthetic fluids. Only used for light towing a...
  4. 08 LMM Dreaded Oil Pressure Switch/Sensor

    Test Forum
    Hoping someone can help or had this issue and figured it out. Customer is having the dredded low oil pressure symptoms with the gauge going to 0 and shutdown warning. I have replicated the symptoms a few times with the gauge and also monitoring with HP Tuners. 2008 Silverado 2500HD LT LMM...
  5. Lmm with mystery problem

    General Discussion
    have had this truck for bout 3 years never had an issue all egr an dpf deleted an properly tuned till about 2 months ago had a fuel knock so replaced all 8 injectors with 43% one an slapped a duramaxtunner 73mm vvt turbo in as well has the lift pump an all to support the fuel system but a week...
  6. Help! LMM problem

    General Discussion
    Was driving, truck turned off completely. Went ride side and it was over heated. Most the coolant was blown out of the reservoir. Got the truck cooled down and more water. Started it up and observed no oil pressure and a god awful noise coming for the motor. Also, a lot of oil blown out of the...
  7. Best delete tuner for LMM for under $500 used?

    07.5-10 LMM Performance Parts Discussion
    My mechanic buddy says that a lot of my problems with my 07.5 LMM stem from the cheap tuner that the previous owner had installed. He says I need a tuner that can delete other tunes (the one in there now is just a switch wired into the PCM from the looks of it), and suggested a mini maxx, but...
  8. Trying to delete before its too late HELP

    07.5-10 LMM Duramax Powertrain
    Have an 09 lmm, exhaust was already installed before i bought the truck so DPF is already deleted, but the EGR is still in place. this is my first diesel so i am not knowledgeable on the subject, but as i understand it there could be a blockoff plate installed or maybe not. Im wanting to make...
  9. 09 LMM intermittent chug/cough on acceleration.

    General Discussion
    hey guys, just bought a 09 LMM. I personally deleted the DPF and put a 5 inch straight pipe from the down pipe back. sent it out for EFI live tune with the 5 position switch. Had the tuner shut off EGR as well. As I sit at a light and it changes and I accelerate, the truck chugs/coughs which...
  10. 2007.5 LMM Duramax purchase questions!

    2007.5 + (GMT 900) Non Powertrain New Body Style
    Hey everyone, been really searching the market for a used diesel truck and have really began to fall in love with a duramax. I ran across a 2007.5 LMM Duramax 1LT crew cab for just below $16k. The truck appears to be bone stock with only two owners. Also need to mention that it has 178k miles on...
  11. New wheels/tires, odd heights at fender wells?

    Wheels & Tires
    So I had some keys installed a few months ago and aligned at 4 wheel parts. Everything has been fine since then but I never thought to measure fender height. Just installed new wheels and tires (in sig) and decided to measure ground to top of wheel well. Front Driver = 43 1/2, Front Passenger...
  12. LMM Stock Suspension

    07.5-10 LMM Duramax Powertrain
    Hey everyone,:help After getting my 6" RCX lift on my LMM, I now have all the stock suspension parts left over (front knuckle/spindle, shocks, etc.) What do yall think these are worth?? I'm just not sure what a fair asking price should be. If any of you are by chance interested, send me a PM...
  13. Another LMM Wheel/Tire Dilemma, Have to decide in 24 hours!!

    Wheels & Tires
    :help I have a LMM leveled with keys. Ordered 20x9 Fuel Hostages with 0 offset and 5" backspace wrapped in 33x12.5x20 Toyo Mt's. Unfortunately they're backordered until who knows when but the vendor offered a 20x10 wheel with a -12 offset which I think is around 4.5" bs. Though I've already...
  14. LMM ADII165 Pressure / Bottle Test

    Performance Upgrades
    Getting my ADII165 installed today. What pressure do I need to run it at? I have heard of 20+ on a max effort tune, but that CAN'T be good on a CP3??? I have even had reputable guys tell me do not run over 10-11 ever. Also, does anyone have pictures of the bottle test? Preferably LMM. I'm not...
  15. Can't decide on Turbo back Exhaust

    Aftermarket Mods.
    Not too far from being out of my factory warranty and wanted to do a turbo back exhaust on my 09 LMM. I was given a banks ram air intake and an edge programmer, so I would like to use those once I put everything back on......because it was FREE! I know I will gain lots of power, but my goal is...
  16. EFI Live?

    07.5-10 LMM Performance Parts Discussion
    Ok guys, this may sound like a really stupid question, but that's what forums are for I guess. Is it possible to have my truck tuned with EFI Live from a performance shop with their custom tunes without having to buy the software? Sorry, I am just confused as to what the purpose of buying the...
  17. Engine Brake Question

    07.5-10 LMM Duramax Powertrain
    I'm still a little new to this game although I've had my truck for over a year now. I saw on someone's sig that they have the Banks Exhaust Brake on their 2007.5 LMM. I've also read that using EFI Live the Turbo Brake can be enabled. How does all of this work? Is it a hardware thing or just...
  18. Fs: Ppe hot race

    Performance Upgrades
    Application: 2001-2010 Duramax LB7, LLY, LBZ and LMM diesel engines Features: 07-10 LMM Hot Race Tuner - DPF delete only 01-07 Hot race for LB7, LLY & LBZ Five to six power levels each with additional horsepower and torque (see tables below) Speedometer corrections (for tire sizes 25" through...
  19. LMM PCV Re-Route Finished

    07.5-10 LMM Performance Parts Discussion
    I finally got around to completing my PCV re-route. It took me a while to get the time to set down and work on it, but It's done and off my list now. Move on to the next item. :mad: :D It turned out really nice. I'm happy with it. I want to say thanks to the SteveO (member name: Leros). I...
  20. LMM DURAMAX True Flow XDI Intake FOR SALE!!

    Performance Upgrades
    i have a used lmm duramax true flow xdi air intake for sale...pm about price Thanks, chris
Top