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2004.5 lly

  1. 04.5-05 LLY Performance Parts Discussion
    Hey all, i'm replacing my factory exhaust off my 2004.5 LLY Duramax. I've decided to go with the MBRP Pro series downpipe-back exhaust and a stainless steel downpipe from PPE. My question to anyone who has done this, is it necessary to buy the PPE downpipe support bracket? I've seen some guys...
  2. 04.5-05 LLY Duramax Powertrain
    I have a 2004.5 lly duramax that hasn’t had an egr delete and I didn’t know if I would have to have it retuned when I do the delete.
  3. General Discussion
    I have an lly recently tuned w a 5 stage efi live. My throttle would previously become rock hard to push down upon getting back into it while going down the road. Since having the tune installed this is happening more frequently. I will be riding down the road, after letting off the pedal and...
  4. Introductions
    I have a 2004.5 LLY with a Banks Six Gun and ETG. Every now and then, if I drive for 2 hours or longer, then shut it down... When I fire it back up, it will die after a few seconds. I will have to jump out and re-prime the fuel system. It never seems to happen if I only drive for an hour or so...
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