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Thread: Bidirectional controls

  1. #1
    Junior Member
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    Default Bidirectional controls

    Hello,
    I am working with a 2008 GMC Yukon XL Denali, 6.2L.

    The GM service manual says that a scanner can be used to activate the vehicle's fuel pump. I was hoping to be able to do this with my EFI Live FlashScan v2. Looking in the EFILive V75 Scan manual, it would appear that bidirectional controls are only available on LS1 and LS6 engines. Is this true? How risky would it be to attempt activating the fuel pump even though this isn't an LS1 or LS6?

    Thank you for any help.

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  2. #2
    Lifetime Member wesam's Avatar
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    Default

    Yes just in LS1B we can activate it but not in E38,E67
    EFILive Tuner

  3. #3
    Lifetime Member
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    Connect to the ECM and open up the DVT tab to see if it's an option. That doc is super outdated.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    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.

  4. #4
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    Thanks for your help, guys.

  5. #5
    Joe (Moderator) joecar's Avatar
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    +1 user manual is outdated.

    When you connect to vehicle, on DVT tab you will see a drop down menu titled "Target Controller", select E38

    then on the Output tab you will see Fuel Pump Duty Cycle.

  6. #6
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    Much appreciated, thank you Joe.

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