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  1. EGR Leaking at block plate, years later

    06-07 LBZ & LLY Duramax Powertrain
    I have a 2007 LBZ that I noticed a few drops of oil in the driveway in the last few weeks which is not normal, so far very few leaks. After looking underneath it looked like oil from the weep hole in the bell housing and I figured this was not going to be a simple fix. There is about 252,000...
  2. Loss of Power

    07.5-10 LMM Duramax Powertrain
    So I’m brand new to owning a diesel and trying to figure this all out. But anyway I bought an 08 LMM with 180K. I replaced the egr valve right away ( had the low flow error and that’s what the mechanic told me to do). But I got the low flow again a month later and cleared it right away and it...
  3. 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...
  4. 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...
  5. Loss of Power above 75

    07.5-10 LMM Duramax Powertrain
    hey guys, this is my 1st post on here... i have an 08' LMM w/ edge CTS programmer and 5" back exhaust w no cat muffler or dpf. Recently when running on the highway at 65-75mph, when accelerating half throttle there is a big bog down of the motor and a rumbling sound accompanied by a small shake...
  6. Catalytic converter delete/egr blocker plate

    04.5-05 LLY Duramax Powertrain
    just bought my 2005 LLY duramax and was wonder what suggestions/input anyone may have as far as taking off my cat converter and what to put in place of it. i'm looking at a dual 4" stack kit from but am not quite sure if this will bolt right up after i remove the cat. also i'm...
  7. help with egr blocker

    How To's, DIY and Write ups
    i have a lmm silverado and fought for an hour or so trying to break the bolts loose to install my egr blocker plate. i dont exactly have a wide variety of tools and im not what you would call a mechanic. any live near st. paul mn that could help me out with this?
  8. Egr block off

    06-07 LBZ & LLY Duramax Powertrain
    Bought a EGR block off plate today, and wanted to know if I have to do anything with the electronics of the truck? Or just install the plate and run it?
  9. TRUCK IS BLOWING WHITE SMOKE after sinister egr delete! help!

    04.5-05 LLY Performance Parts Discussion
    today i put it the sinister full egr cooler delete and now my truck blows white smoke pressing on the gas at all! any ideas ?!
  10. Quadzilla S2/ Egr blocker plate ????'s

    Performance Upgrades
    I recently purchased the Quadzilla S2 and just put on the 5" mbrp Straight pipe today, i was wondering if i need to have the egr blocker plate installed in order to run Quadzilla's Offroad tune that blocks the Egr codes. I want to do so because the Service light is annoying to look at, but...
  11. Egr blocker plate install helpp!!!

    Aftermarket Mods.
    well i got a egr blocker plate for an 05 lly,,, nd welll i took off the egr put it on the blocker plate and put it back together,,,,, but the plate didnt line up right where i put it on but didnt think much about it,, started the truck up nd she wouldnt run for shit,,, so i took it all off,, btw...
  12. EGR blocked noises?

    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...
  13. Truck will not run, black smoke. Bad EGR valve?

    911 Problems Forum
    Thanks for reading my post! Last week my 07 duramax with 99K miles (powertrain warranty goes out at 100) lost power and started belching black smoke. It limped home, barely, and the next morning would crank and then go dead, more black smoke. I had it towed 35 miles to a GM dealership, and...
  14. egr delete?

    07.5-10 LMM Performance Parts Discussion
    hey im new to the forum. i drive a 08 lmm i just ordered a dpf delete with a ppe tuner alose the egr block off plate. how do the egr plate go on? also would mod the air box help or should i leave it the way it is? any help would be greatly appreciated thank u.
  15. 2nd issue today EGR...

    911 Problems Forum
    Got my block off plate in and need to install the finger stick. The only problem is I am having a problem identifying the EGR connector. Going back out to look again but if someone has a pic they can share it would be greatly appreciated! I'm feeling like such an idiot today....
  16. EGR valve

    06-07 LBZ & LLY Duramax Powertrain
    I have had my 07 classic for two years and every 3-6 months the CEL would come on and then go off after a week or so. I figured it was exhaust related (the truck is bone stock) and that i just had a sensitive sensor. The past three weeks it has come back on, gone off, and then immediately come...
  17. Oil coming out around EGR block off plate??!!

    911 Problems Forum
    Doing routine maintenance when I noticed what looked like soot leaking around my EGR blocker plate. Closer inspection it was a little soot and oily as well. I pulled the plate and this is what it looks like: Pic 1 is the Intake side of the plate, pic 2 is the exhaust side. WTF is going on...
  18. LBZ Getting new turbo.

    06-07 LBZ & LLY Duramax Powertrain
    Hey guys. I'm new here and hoping to get some help with some issues I've been having wt my 07 classis LBZ (approx 65k miles). About a year ago the check engine light came on but turned of again before I could get it to a dealer. It ran fine so I never took it in. By the third time this...
  19. 03 with codes that I can't fix?

    01-04.5 LB7 Duramax Powertrain
    I have an 03. I live in Ca. and I have to smog my truck this month, and it won't pass because I have a cel on I have cleared the codes, and replaced parts for the codes but light keeps coming back on any sugestions the codes are P0101, AND P0404. I have replace the MAF sensor, a new EGR valve. I...
  20. LLY to LBZ mouthpiece screwup leads to complete EGR removal

    04.5-05 LLY Performance Parts Discussion
    OK I have read all the posts about this and thought I could get er done without too much heartache but NO I can't do anything without having to fix about 3 other things I tear up along the way, so if you are about to make this swap check this out. I didnt really want to grind the flange of my...