LS1TECH - Camaro and Firebird Forum Discussion

LS1TECH - Camaro and Firebird Forum Discussion (https://ls1tech.com/forums/)

- Generation III External Engine (https://ls1tech.com/forums/generation-iii-external-engine-6/)

- - 98-02 LS1 Engine Harness (https://ls1tech.com/forums/generation-iii-external-engine/1912079-98-02-ls1-engine-harness.html)

Mjfoss17

12-19-2018 04:04 PM

98-02 LS1 Engine Harness

Hey everyone,

im trying to find the part number for the OEM engine harness for a ‘99 SS w/T56. Previous owner with himself or someone else try to delete or remove some function by cutting harness wires which I’m now finding out has fried my PCM so I want to replace the harness in addition to the PCM so I don’t fry the new pcm but all I’m finding are aftermarket wire jobs. Unfortunately I didn’t find out my PCM seas fried til after I had my friend trybtonthne it post head/cam swap and received a cam pos sensor malfunction. $250 wasted on a tune license I can’t use..

Full-Force

12-20-2018 05:04 PM

I believe I would just get the full FiTech stand alone system. Its 800 bucks, self learning, computer, harness, touch screen controller, plug n play, etc

LS1 pwrd NOVA

12-21-2018 08:32 PM

Or just buy a good used harness for about 200

gMAG	12-31-2018 04:25 PM

The 98 harness is different than the 99-02. The 98 uses a three-wire coolant sensor, as opposed to a 2wire on the 99 (I might have this reversed, it’s been a while) + a few other things.

wannafbody

01-02-2019 10:38 PM

There is a guy on facebook who sells complete new harnesses for about $500.

LS1 pwrd NOVA

01-03-2019 04:56 AM

$500? Might as well buy a psi harness for the same price but they are a well known company.
or sometimes Ebay has a rebate you can use on anything on eBay parts. Got my psi harness new for $450 shipped

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