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  1. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    Please help! I bought my first diesel truck at the end of April. A 2007 GMC 2500HD Classic (LBZ) This past weekend we did some routine maintenance, oil and filter, transmission filter and diesel filter and water separator. The truck has an Airdog 150 and has had the factory filter head...
  2. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    My truck, 06 duramax LBZ Allison I was towing my 27’ travel trailer. I had to push a bit to merge on freeway. Engine rpm was much higher than normal when shifting in to next gears. I’m guessing it was in 3rd when engine rpm was much higher than normal shift points. Wondering why it occurred...
  3. Allison OEM
    Its been a while since I've posted anything here on this revamped board. So here goes: Truck has: 595,750 kms Deep Pansince Apr 2007 Transynd since Apr 2007 TransGo Jr since Apr 2007 Ally has been serviced with new internal filter 4 times since I've owned it. Change spin on with every oil...
  4. Drivetrain - 2001 - 2010
    I am just getting ready to install the fourth set of wheel bearings on my 2007 Classic 2500 HD 4x4 with the LBZ engine and I am wondering if there is a way of lubing the bearings once installed on the truck? Anyone tried it to extend the life of the bearings?
  5. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    When I start the truck, I get a small puff of white smoke! What could cause this? LBZ, 280K.
  6. Closed / Archived Marketplace Ads
    I am the original owner of this amazing truck. I have all the receipts from day one. It has been garaged it’s whole life. Fuel treatment in almost every tank. On to the stats. Color: Graystone Metallic, heated charcoal leather seats, power driver and passenger seats, 6” lift w/ 35” nitto...
  7. Buying or Selling a Truck Questions
    Trying to decide if I should sell. Can anyone tell me if $40k is a pipe dream 😀. 2007 classic, ccsb, 106,000 miles, original owner,clean title, 6” and 35s, color match canopy, LT3, t-case pump rub kit, tuner and exhaust. Location Oregon.
  8. Closed / Archived Marketplace Ads
    Truck is in sig. It's my baby. But she is starting to show its age somewhat. Still runs strong and Ive always thought of it as my more reliable truck even compared to my new ones as I got them. It needs rockers and a cab corner other than that it's a 15 year old truck. I've always replaced...
  9. Vans
    Looking for information and advice... Is there a specific bolt up 4in straight exhaust I could use for my 06 gmc savana 3500 ( non extended) . I was told 4 wouldn't.work and just to cut out converter and muffler and use stock size pipe...also looking into a possible programmer. Or a single tow...
  10. Allison OEM
    I got a LBZ for my swap and I'm in the market for a transmission to pair with it. What years of the allision work with LBZ? Is it just 06-07 or some more later years too? I know 05 and previous don't work at all. If some later years work is there any special setup or is it get that year tcm and...
    lbz
  11. Drivetrain - 2001 - 2010
    Occasionally my abs lights comes on so today I pulled codes and got C0035 and C0040 which is for both front wheel speed sensors. I also have an issue where when I hit 15kmh while braking the abs kicks on a pulses and the truck slams to a stop. Both front wheel speed sensors are reading. Anyone...
  12. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    Radio and lights turn on as soon as battery’s are connected throttle cuts in and out and tuner is frozen (bully dog gt)
  13. Duramax Seventh Generation: 2020+ (L5P)
    Hey All, It’s been a while since I’ve been on here. I currently have a 2007 LBZ with 165000 on the clock. Most of my issues with the truck were the result of a defective factory paint job. This resulted in numerous trips to the body shop on my dime. Everything else was maintenance related work...
  14. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    New to site, I have 2006 LBZ all stock and am looking to install a 4” straight pipe. Called diesel performance shop and they told me I would need a tune on the truck otherwise I would go into limp mode. I have never heard that before. Any help would be appreciated.
  15. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    I have a 07 LBZ that is throwing a code for low fuel rail pressure. It only does it when ambient temp is over 90’F and I’m towing at highway speeds. I already replaced the fuel rail relief valve and the fuel filter and now I’m suspecting one or more injectors may be bad. I have noticed a...
  16. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    Noticed this leak after just driving regularly down the road thought it was ac but I still have ac the next morning it was some sort of green fluid, it sprayed all over anyone know what hose this is ? And why it blew.
  17. Builds
    I have a 86 Chevy c30 crew cab I'm currently fixing to begin a lbz swap I have a 07 gmc 2500hd donor truck I've seen plenty of these swaps done where are they getting the engine mounts from since the factory Duramax mounts are offset any information is appreciated and thank you in advance.
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