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Thread: Lean Cruise help

  1. #1
    Junior Member Manbearpig's Avatar
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    Default Lean Cruise help

    I have a 2004 GMC Sierra with the LM7 5.3

    I'm taking a trip next week and would like to throw on lean cruise.

    I don't have a wideband or anything, still need to get one.
    Just looking for some insight as to how I would go about this.


    Thanks guys.
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

  2. #2
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    I dont believe you can run the LC patch on 03-08 LS1 PCMs as they are 1MB flash vs 512kb.

    I may be wrong, but Ive only heard of 98 (with 99+ PCM conversion)-02 cars/trucks using LC.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3
    Junior Member Manbearpig's Avatar
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    Aww hell :(
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

  4. #4
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    I have a 1mb pcm running lean cruise... if you have the tables then it is in there. Just download the patch to enable those tables
    2005 chevy silverado, duramax tuned with efilive
    1997 Saturn sc2 turbo, tuned with megasquirt on e85
    2000 s-10 turbo'd tuned with efilive on e85

  5. #5
    Junior Member Manbearpig's Avatar
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    Quote Originally Posted by chevy052500hd View Post
    I have a 1mb pcm running lean cruise... if you have the tables then it is in there. Just download the patch to enable those tables
    Where do I go to download the patch? If I can edit the tables are they already enabled?

    < Noob

    Thanks
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

  6. #6
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    Quote Originally Posted by chevy052500hd View Post
    I have a 1mb pcm running lean cruise... if you have the tables then it is in there. Just download the patch to enable those tables
    Really?! Thats great news, I didnt know 03-08 PCMs had the .cax to enable LC!

    Manbearpig, check out the links in this subforum: CAX File forum
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  7. #7
    Junior Member Manbearpig's Avatar
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    I honestly don't know what I need to be looking for.
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

  8. #8
    Joe (Moderator) joecar's Avatar
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    You would have to know the byte address/offset inside the binary file for parameters you want, and you have to know the format of the parameter data (bit width, signed/unsigned, little/big endian, scaling)...

    i.e. you would have to reverse engineer them for your calibration.

  9. #9
    Junior Member Manbearpig's Avatar
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    So, I'm assuming it's going to be a fairly difficult process to get it going?
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

  10. #10
    Junior Member Manbearpig's Avatar
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    Alrighty, well I found the LC patch and enabled it.
    Going to try out the LC tables from a stock 04 Monaro tune.

    See if it helps me out any.

    Not quiet certain if I want to run the lean cruise yet on my trip next week. Kinda worried about running it that long lean without a wideband
    2003 1500HD Quadrasteer- 6.0/80e|V2
    2004 GMC Sierra- LM7/60e/G80|V2-Totaled :(
    2004 GTO TR- LS1/60e

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