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  1. I thought I posted a reply to thank you, but I...

    I thought I posted a reply to thank you, but I don't see it here. I appreciate your help, Thank you.
  2. 23931 Can someone with some experience take a...

    23931

    Can someone with some experience take a look at this and tell me if it looks reasonable/safe?

    I tried to copy the hypertech-tuned transmission data over from the bad speedo file to the...
  3. It was put on the PCM by the company that sold it...

    It was put on the PCM by the company that sold it to me based on my VIN. In the very beginning it's a little stumble, the RPM's dip, and then it comes back up.
  4. Update: I received my new PCM in the mail and...

    Update:

    I received my new PCM in the mail and installed it. I had to do the passkey learn process like three times because the tutorials didn't say I had to try and start it each time to get the...
  5. I picked up the truck today, the battery was...

    I picked up the truck today, the battery was completely dead, so thanks for that dealership. I received shipping notification of my replacement PCM so it will be here in about 16 hours. I took the...
  6. Update: I went to the dealership to try and...

    Update:

    I went to the dealership to try and flash this tune onto the truck. I plugged it in and turned the key, but got only a check engine light. nothing else, no needle movement or lights or...
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    Thank you Paul. This makes me feel a lot better,...

    Thank you Paul. This makes me feel a lot better, now that I have a plan. I appreciate your response.
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    I know this is an old post, but I think it's...

    I know this is an old post, but I think it's relevant to my issue with the hypertech and I think this part in particular is very helpful. Besides the light flashing, is there another way to tell if...
  9. I appreciate your assistance here with a tune...

    I appreciate your assistance here with a tune file. I don't know enough about this process to tell if the values look reasonable or safe for my vehicle but at this point I'm willing to try just about...
  10. Update: I towed the truck to the dealership,...

    Update:

    I towed the truck to the dealership, the tech says he tried to reflash it, but the tune wouldn't take. I don't know how their system works, or what tool or mode or method he used, but I...
  11. Update: I called Hypertech customer support about...

    Update: I called Hypertech customer support about my experience and the code E8 that popped up on the tool. Dude said 'that code means the device needs to be replaced. we don't stock them or service...
  12. This is the only file I have from the PCM and it...

    This is the only file I have from the PCM and it contains an error.

    23889
  13. 2388623890

    2388623890
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    I started a thread here:...

    I started a thread here: https://forum.efilive.com/showthread.php?30402-LS1B-8-1-4l85-with-failed-hypertech-tune-assistance

    When it allows me to upload files I will post it up and hopefully...
  15. LS1B 8.1/4l85 with failed hypertech tune assistance

    Background: I am in Nevada, USA (pacific time zone). I bought an 04 Avalanche 2500 with the 8.1 and the 4l85 trans. I *think* this is the LS1B ECM(?) The previous owner lifted it, slapped 35's on it...
  16. Following, and commenting to get my post count...

    Following, and commenting to get my post count high enough to attach files. good luck OP. I have an 04 2500 with the 8.1
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    This is helpful information, thank you for...

    This is helpful information, thank you for sharing. For some reason the files aren't attached to the posts anymore, are they available somewhere?
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    I found this thread using the search, and I think...

    I found this thread using the search, and I think this extra line of code from third party programmers might be the root of the problem I'm experiencing, but I have an older truck with a different...
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