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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #1 ·
What components are responsible for the security system in an 02. Im swapping my 99 to a low milage 02 drivetrain.

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #2 ·
I have the entire harness bumper to bumper

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #6 ·
Even if I have to gut the entire car and replace every sensor. I just wanna know if anyone knows which components exactly are different and incompatible

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #8 ·
Will I need to swap radio? Or the memory modules? Etc
I guess im asking if I need to rip out the dash too. I will if need be
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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #10 ·
Aj. If ur there did u have a chance to look at that diagram I sent u?

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #11 ·
Im sorry. If u can cram a big ole Northstar n a fiero I don't think its a stretch to be able to do this. This seems minor in comparison

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #13 ·
My reason for going this rte is bc I've not found a powertrain for my car w less than 100000 mi. If imma spend 3000 or 4000 I want the entire powertrain and close to 50k miles. Getting info from ppl who have the knowledge tho is like trying to squeeze blood out of a turnip. Quite frustrating. Thankfully my uncle has a friend who crams northstars n fieros so he may help

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if you're going to spend that much why not just rebuild your current parts instead of hacking together a Frankenstein (because that's what a 2000+ powertrain in a -1999 body will be)

at least that way you will know exactly what you've got...

what assurances do you have that this 2000+ powertrain is in perfect condition?

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and why are you doing this in the first place? do you have blown head gaskets? leaky lower block seals? p0741 tcc code?
 

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #15 ·
I know the guy. And I don't want rebuilt. Factory only. My current engine has problems. Unrepairable

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #16 ·
I'm doing it because I'm tired of messing with this engine and transmission. I want to start fresh

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1) getting it to fit is going to be a challenge
2) getting the modules to talk to each other will be a challenge

to me, #2 is more of a roadblock than #1
 

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #18 ·
Fit should be easy. Im gonna just use trial and error since im on my own here pretty much. The 99 and 02 Sts are identical bodywise. They both seem to utilize class 2 serial data streams. I'll know more when I stretch out the 02 wiring harness. I can't afford a remanufactured one and my current tranny has 170000 on it. Seems to make sense to replace both.

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1999 Cadillac Seville STS
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447 Posts
Discussion Starter · #20 ·
Is the cluster different? If I must ill swap everything. Im going to swap as little as possible.

Oh. And yes I do have the pcm. Do I need to swap the radio too?
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