PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

PCM swap

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Old May 25, 2005 | 01:41 AM
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Terry'sToy's Avatar
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From: victoria canada.
Default PCM swap

I have a 98 LS1 motor and wiring harness for a M6 that i will be putting in a 69 GMC truck. I will be swapping to an A4.

I understand I can just add the A4 wiring harness, but I want to be able to use an 01 computer. The 98 and 01 injectors are the same (right??) so that shouldn't be an issue.
But can I just plug the 01 computer into the 98 harness and add the A4 section to the 98 harness and be done?
I have tuning for an 01 but not a 98.

Thanks
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Old May 25, 2005 | 02:31 AM
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i think they are diferent plugs!!The 98 are diferent than the comming years.
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Old May 25, 2005 | 08:35 AM
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anyone else.
this is for a project truck, so I don't care about the dash and whatnot. I just want the motor to run.

thanks
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Old May 25, 2005 | 11:12 AM
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Call Speartech and talk to John. He might be able to convert it. The connectors (and I think a few of the sensors) are different so it will probably be easier and cheaper to just sell the '98 harness and get a '99+ to go with the later PCM. I bought my '00 harness and PCM together for under $300 in the For Sale section, so they are out there.

-Matt
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Old May 25, 2005 | 05:57 PM
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Thanks for the info. I'll have to give John a call.
You are probably right, it would be easier to get a 01 auto harness and computer and be done.
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