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Thread: L92 swap help needed

  1. #11
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    Oct 2005
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    Quote Originally Posted by ScarabEpic22 View Post
    Ah thanks for the sanity check Taz, an E67 would have been perfect for this because it has serial comms still (the reason the GMT360s use an E67 vs E38 so GM didnt have to rewire the entire truck). Keep VVT and 6L80E support too with the proper OS.
    -for sure this would be the best approach. I looked at a number of vehicles that used the E67 but did not come across one that has VVT and 6L80E.
    Would an OS from lets say an 08 Trailblazer work? Class II is there question is can VVT just be activated?
    Also, will an 6L80E run if a T42 is expected?
    Only combination of E67 and T43 I am aware of is the 09 CTS-V...question is if that OS will have Class II data and
    support VVT?
    Any insight on that is welcome.

    //Lennart
    2005 RCSB 2500HD GMC Sierra DURAMAX LLY
    1955 Chevy Truck 1st series, being restored
    2002 Mercedes C270 CDI

  2. #12
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    Oct 2005
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    175

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    Just want to give a quick update:
    E67 is swapped in place of E38
    First E67 was one out of an 06 Cobalt SS, did a full flash but got a P2138 (APP voltage mismatch) as well as a U0101 (trans communication)
    Second E67 came out of 08 Trailblazer 4.2, same OS as TBSS (12618164) same codes after a full flash.
    Had a guy with Tech2 reprogram both E67 to the 07 and 08 TBSS OSs, still got the P2138 code.

    After quite a bit of measuring we found that the Accelerator Position Pedal uses a different logic on the E38.
    While the voltages on the E67 (Trailblazer) are changing in opposite direction (one value increases, the other reduces) the E38 voltages
    both increase as you push the pedal. Also, the resistances between both pedals is quite different.
    Ordered a Trailblazer pedal now, hopefully that will fix the problem.

    Then we programmed the T43 with a tune from an 08 XLR-V (24243170) and the code U0101 is gone. Looks like the
    OSs talk to each other.
    2005 RCSB 2500HD GMC Sierra DURAMAX LLY
    1955 Chevy Truck 1st series, being restored
    2002 Mercedes C270 CDI

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