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Thread: 1998 Black Box PCM Full Flash???

  1. #1
    Lifetime Member GAMEOVER's Avatar
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    Default 1998 Black Box PCM Full Flash???

    Can the older black box pcm's be full flashed and change from a V6 OS to a V8 OS...I have a pcm that I used a license on(vortec V6), I'm about to do a motor swap using a 1998 5.7 Vortec and was wondering if I can just do a full flash and change it to a V8 so I don't burn another license...
    I ask because I've only full flashed the LS1 PCM's and change from a V6 OS to a V8 OS all the time...
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

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    Hello Gameover,

    I don't do black box Vortec tuning, but I do know the V6 and V8 "Vortec" trucks used the same PCM in any given model year. Not sure if those PCMs have Serv# and HDW# like the LS1-Bs do .... if so, double check that, but you should be OK to reflash the V8 program into the V6 PCM.

    Regards,
    Taz

  3. #3
    Lifetime Member Chevy366's Avatar
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    Just went through this with someone , the part number for the PCM is the same V6-V8 , so should be able to without any problem .
    2005 1500 HD , Custom OS3 SD tune .
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    Dinosaurs and Plants gave their lives so that we may drive , long live fossil fuel .

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    Lifetime Member GAMEOVER's Avatar
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    Ok cool... Gonna try it this week!
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

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    Can you actually do this in EFILive? I dont remember the full flash option being available when I pulled my buddy's 99 Blazer V6 OS a year back...
    ~Erik~
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    Lifetime Member GAMEOVER's Avatar
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    IDK...gonna try it tomorrow evening though, I'll let you know how it goes...
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  7. #7
    Lifetime Member GAMEOVER's Avatar
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    I tried it and the FULL Flash option isn't available... So I tried calibration only and it looks like EFI Live wrote over the V6 calibration...
    I did a comparison between the Original V8 tune file and the tune File I just flashed in...NO Differences at all.....so I'm thinking I might be good...
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  8. #8
    Lifetime Member GAMEOVER's Avatar
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    I read the PCM and it looks like there's a 1998 V8 5.7 file in it now!
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

  9. #9
    Lifetime Member 5.7ute's Avatar
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    Gameover. If you like post both files. (The stock V8 file you used as well as the file read from the PCM after the conversion)
    I can then turn them into a bin file & make sure there is no hidden differences present. It might also be worthwhile doing a complete segment swap on all segments to ensure undefined parameters are changed as well.
    The Tremor at AIR

  10. #10
    Lifetime Member GAMEOVER's Avatar
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    Thanks...
    This is original:1998 Chevrolet Tahoe Truck Automatic L31 5.7 Litre
    This is the file I read after the flash: 1998 Vortec 5.7 Frank
    Attached Files Attached Files
    2008 2WD Ext.Cab Silverado 1500 6.0 V-MAX E38(L76) & T42(4L70E) MAF Only CL Corvette Servo AFE CAI INNOVATIVE LM-2 WBO2

    FLASHSCAN V2 & AUTOCAL

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