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Thread: New 6l80e TCM

  1. 01-29-2021 #1
    Drop Bear JK
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    New 6l80e TCM

    Hi guys. I have just bought a new transmission.
    Do the TCM is blank no programming. Can I use my files I already have and just upload it to the new tcm via HP
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  2. 01-29-2021 #2
    TheMechanic
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    No. Needs programming with GM's SPS to set initial programming.
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  3. 01-29-2021 #3
    Drop Bear JK
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    Quote Originally Posted by TheMechanic View Post
    No. Needs programming with GM's SPS to set initial programming.
    Thanks for the response
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  4. 02-01-2021 #4
    2xLS1
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    I've seen probably over 100 T43 TCMS right out of the AC Delco box. In all those I think only 1 was actually blank and showed no segments. I program them for a few transmission shops. They typically don't have VIN #s in them but they have 4 valid segments. Usually not correct for the vehicle they are going into but can usually be programmed with a Write Entire if you read the original TCM first. I usually do them with a bench harness and Tunercat but I've done a few with HP Tuners too. The trick is reading the original before it is turned in for a core. And Tunercat programmed the one that was actually blank with it's force full program mode which is the same as HPT write entire.
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  5. 02-02-2021 #5
    TheMechanic
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    Quote Originally Posted by 2xLS1 View Post
    I've seen probably over 100 T43 TCMS right out of the AC Delco box. In all those I think only 1 was actually blank and showed no segments. I program them for a few transmission shops. They typically don't have VIN #s in them but they have 4 valid segments. Usually not correct for the vehicle they are going into but can usually be programmed with a Write Entire if you read the original TCM first. I usually do them with a bench harness and Tunercat but I've done a few with HP Tuners too. The trick is reading the original before it is turned in for a core. And Tunercat programmed the one that was actually blank with it's force full program mode which is the same as HPT write entire.
    Good to know. I have GM access so I have always just used SPS to do my initial programming. I was unaware that you could do a full programming with HPtuners.
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  6. 02-03-2021 #6
    blindsquirrel
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    Quote Originally Posted by TheMechanic View Post
    Good to know. I have GM access so I have always just used SPS to do my initial programming. I was unaware that you could do a full programming with HPtuners.
    The Gen4 ECMs are the troublemakers, because of the two inaccessible segments for the integrated TAC. (fake edit: at least one of the hidden segments is TAC, I dunno if both of them are because hidden)
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