I have the chance to get a 2000 S10 Blazer 4x4 2dr with a 5 speed manual. I'm assuming its the NV3500? Anyways. Something mangled the wire harness to the PCM. They got things half spliced together and totally destroyed the ground splice pack things.

Since this seems to be a rather rare combination, I am having trouble finding a replacement harness. Is there a way I can get the PCM pinout for a 4.3 with 5 speed manual. I haven't had much luck with Google.

 

Factory manuals should have it.

 

Ok. If I can't save the harness, can I buy a harness off an auto trans model and make it work?

 

This should have what you need.

 

Yes. Plenty of people switch from automatic transmissions to manuals without replacing the harness, me included.

 

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i campared the "manual" harness with presumably an AT harness. For the most part they were the same. I think the manual harness was missing two pins, while the AT harness had a few extra pins.

So how does this work?

I read something about splicing into the VSS and your reverse lights and possibly have some unused wires/connectors?

 

Well I bought it! I didn't realize it was a 2001 and not a 2000, I already ordered a harness from a 2000 blazer 4x4 with 4.3. hopefully it works. 😕

 

To the best of my (limited) knowledge, it should work fine.

 

Unfortunately the 2000 harness had different connector for the PCM, I guess the PCM changed from 2000-2001. Do you happen to have a pinout for a 2001 blazer with 4.3 and 5 speed? I'm back to repairing the old harness lol

Specifically I'm looking for what the 3 grey 5 volt reference wires do in pins 46-48. I was able to get it started but I have a TPS code, an EGR code, and EVAP code. I'm assuming I have 3 mixed up. I

 

Let me know if this works for you.