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  1. 03-30-2012, 11:27 AM #1
    1slowbusa
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    Question 1998 Corvette PCM vs 1999-2000 F Body PCM

    Ok, so my buddies dad purchased an LS1 with computer and harness from a 1998 Corvette. I have HP tuners for 1999 and 2000 F bodies and he will want me to tune it when he has completed installing it in his 67 camaro. I do not want to purchase more credits.

    Can he just find a computer from a 99-00 f body and it will work with the 1998 corvette harness?
    Does anyone have a part number for 99-00 f body PCM?
    Does he need to buy 99-00 f body harness and PCM and will it work with the 1998 corvette engine?

    Thanks,
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  2. 04-01-2012, 09:59 AM #2
    bmax327
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    He is better off with a later model computer. You just have to move a few pins in the harness to new locations for the later PCM.
    You have more options in the later PCM anyway so it's the way most people go. Check out EFI Connection for PCM and harness pieces if needed.

    Brad
    1999 Formula, M6, mostly stock daily driver. ARH Headers, Hooker cat back, Koni's. EFI live V2, LC-1 serial connection. BRE custom cam
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  3. 04-01-2012, 01:44 PM #3
    cpop98ws6
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    98 WS6/04 Sierra Dmax

    99-02 computer will not work with the 1998 harness. If you go with a newer style computer you will have to change the harness and yes a 99 and up harness will work on a 98 ls1.
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  4. 04-01-2012, 08:03 PM #4
    bmax327
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    You can repin the 98 wiring harness to work with the later ECM. Only glitch is to get the fuel gauge working.

    Check these links for more info.


    http://www.ls1.com/forums/f9/98-pcm-...90/index2.html


    LS1 Swap FAQs - LS1TECH

    Good luck
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  5. 04-02-2012, 03:11 AM #5
    cpop98ws6
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    That's some good info there.
    Callies 383, Trick Flow 225, Rapid Motorsports Dominatior 2 X cam, ls6 ported oil pump,42lb injectors, FAST 92/92 , ASP underdrive pully, eletric water pump, Pacesetter LT's, Pacesetter ORY, Magnaflow catback, e-cutout, Yank SS 3600, Performabuilt stage 2 4l60e, Strange S60 ,4.10s, Detroit Truetrac, (UMI) - Adj. LCA, Adj. tunnel mount torque arm, Adj. panhard bar, Drag bar, subframe conectors, shock tower brace. 465rwhp-438rwtq 11.09@119.90.
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  6. 04-02-2012, 05:39 AM #6
    98TransAmWs-6
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    98 TA WS6/ 01 C5 Corvette

    I was actually thinking about doing something like this with my 98. I just haven't been able to find a guide to repinning. That was definitely useful info though.
    1998 Trans Am WS6 - Phantom
    421 CI LQ9, Tick Performance Custom Cam, TFS 255cc LS3 heads, Kooks 2" LT headers, Kooks 3" True Duals w/ high flow cats, FTP 104 lid, Speed Density Tune, 4" silicon tube, LS6 VCT, FAST 102 Intake, NW 102 TB, Oil Catch Can, SLP Bilstein Shocks w/ Vogtland Springs, CTS-V 4-piston Calipers w/C6 Z06 rotors, Stainless Steel Brake Lines, R1 concepts premium rotors, Hawk HP+ brake pads, VFN WSQ Hood, C5-R timing chain, SLP oil pump, E85 tune, Walbro 450 fuel pump, Deatschwerkz 95# injectors, Breathless performance headlights, Frost Tune, !HVAC.
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  7. 04-02-2012, 09:38 AM #7
    bmax327
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    Different application, but here is more info on how to repin the connectors. it's not hard, just have to label and work one at a time.


    GM Truck Central GMT400 12200411 PCM Swap

    Brad
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  8. 04-20-2012, 09:41 AM #8
    bmax327
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    I found another source for the work involved.

    Enjoy.


    Convert 98 to 02


    Brad
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