1999 PCM for 1998?
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Staging Lane
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Joined: Aug 2007
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From: San Luis Obispo, Ca
1999 PCM for 1998? So I've swapped a 1998 ls1 in place of a destroyed 1999...can I reuse the PCM and harness? Anyone know the differences? Didn't find much by searching and I need a quick answer so i figured I would ask 
. Thanks!
. Thanks! Thread Starter
Staging Lane
iTrader: (1)
Joined: Aug 2007
Posts: 80
Likes: 0
From: San Luis Obispo, Ca
Alright, from what I've gathered they have both different PCM's and wire harnesses. I would like to use my 1999 harness on the 1998. Can I just change out the sensors and use the 1999 harness and computer?
Yes.
I actually believe every sensor is the exact same except for the coolant temp sensor. The one in the '98 motor will not work with the '99 harness (3-pin in '98 vs. the 2-pin in '99+)
I had a '99 motor in my '98, and that was the only thing I needed to swap.
I actually believe every sensor is the exact same except for the coolant temp sensor. The one in the '98 motor will not work with the '99 harness (3-pin in '98 vs. the 2-pin in '99+)
I had a '99 motor in my '98, and that was the only thing I needed to swap.
If you use the 99 Harness in the 98 car, you will have to re-pin the body connectors on the passenger side, and swap fuel segments in the tune to make your fuel guage work, but it can be done
