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  1. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    I have the turbo out on my 06 LBZ and wondered what else I should do while I have the access. The only mod the truck currently has is a blocker plate on the right up pipe to the EGR. If I completely remove the EGR system will I need to get the truck retuned? I am thinking it would be a good...
  2. 6.2L Diesel Engine
    Hello everyone I’ve got a 1986 m1028 cucv and I would like to put a 6.5 turbo on it not for added power so much as I just wanna hear some turbo whistle while adding a tiny bit more power. I know I can’t run more than 4 to 5 psi but is there anything I should look out for??? thanks guys.
  3. 6.5L Diesel Engine
    Alright, so I bought the truck back in April 2020. It's a '99 K2500 but the previous owner put a '97 VIN S as he said the original engine crapped out. He said the '97 had around 170K miles on it when it was put in, but didn't say how many miles he's put on it after it was put in. The odometer...
  4. Duramax Second Generation: 2004.5-2005 (LLY)
    So I learned the hard way on the road that my LLY runs hot when towing in the heat. I already have a k&n intake that I’m not wild about (plan was to upgrade it to a different filter). Can I run an improved turbo mouthpiece with the K&N intake or would I need to swap that out to make it work?
  5. 6.5L Diesel Engine
    How interchangeable are the different GM-4,5,6,8,etc... turbo parts? I have three: a 95, an 97, and another with no "GM_" number. I polished up the compressor housing on the one missing the tag wanting to put it on the 1997, but it has a slightly different shape. CHRA's look basically the same...
  6. Duramax Fourth Generation: 2007.5-2010 (LMM)
    Hey guys I got a 2008 lmm with 200k miles efi live threw korey Willis s&b cold air and just 4 in down pipe back to a stack i when out yesterday around 12 fired it up (wasn’t the first time in ran yesterday) it was 33` outside put it in reverse and it started to sputter and blow white /black...
  7. 6.5/6.2 High Performance Engine Modifications
    I’m in the planning stages of a turbo build for my van. The vehicle is a 1993 Air Force G30 delivery truck with a 6.2L NA with 87,000 miles. The specs: 87k miles on original engine, injector, pump Heads replaced with “6.5” aftermarket heads from extremediesel 6.5-6.2 felpro head gaskets New...
  8. Duramax Fifth Generation: 2011-2016 (LML)
    2011 lml duramax about a week ago started making a noise it sounds like the turbo trying to blow off while its building boost it happens between 1200-2000 rpms truck still runs good and builds boost at wot just between that range the turbo sounds like it's blowing off has h&s tuning I thought...
  9. Duramax Second Generation: 2004.5-2005 (LLY)
    I am looking for a new or slightly used vane position sensor for a 2005 LLY dmax. Would be interested if anyone has one they would be willing to part with or if anyone knows the OEM part number and/or where to buy. Thanks for the help.
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