12200411 PCM swap for 1996 to 2000 GMT400 trucks

ImpressiveFool · May 31, 2023

Lextech said:
Since we have a new 96 up Vortec subsection, I thought I would make a new post.

The 12200411 PCM can be installed into the 96 to 2000 GMT400 trucks simply by repining the PCM connector terminals. The wiring is slightly different between the 96, 97, and 98 to 2000 trucks. The 0411 PCM has a much faster processor than the Black Box PCM and has dual timing tables. There is also more support from the tuning software companies for the 0411. EFILive and HPTuners both offer "Custom Operating Systems" for the 0411 to support boost and or nitrous. The swap can be completed in about 2 1/2 hrs and is fairly easy to do. If anyone is interested in the swap just PM me your e-mail address and I will send you a copy. I will not post the files to the web.

Jeff

I Need That 0411 Swap Pin Sheet Please Brother... [email protected]

Scottm · May 31, 2023

Here, again:

0411 Pinout Contact for Lextech

Lextech never checks in here anymore, however he can still be reached by his email for anyone needed the pinouts for an 0411 swap. As of 2023 he is still charging $20, and responds quickly via email. [email protected] Maybe a mod can sticky this? Or update the original 0411 swap post...

www.gmt400.com

Billcripps · Jun 1, 2023

Has anybody gotten a spreadsheet from Lextech. I sent a email a couple days ago and haven’t heard back from him. I really need the spreadsheet so I can get this truck going. I was given a email address for him,I hope it was the right one.Thinks.

BeXtreme · Jun 1, 2023

Billcripps said:
Has anybody gotten a spreadsheet from Lextech. I sent a email a couple days ago and haven’t heard back from him. I really need the spreadsheet so I can get this truck going. I was given a email address for him,I hope it was the right one.Thinks.

did you get the email address from the other thread? This thread should be dead. There are multiple posts and links to the other thread stating as much. I got my spreadsheet from him at the same email address stated in the thread linked above

budzrex · Jun 1, 2023

He was fast for me sent him and email and got a response the same day, bought the wiring diagram then went and found a PCM sent it to him and had him program it. He emailed today that it went out he only got it Tuesday in the mail. That to me is first class service

Scottm · Jun 16, 2023

I did the 0411 wiring swap today on my 97 k3500. I got through the top half of the lextec sheet no problem. All old connector wires made it into the new connectors. But then going down the second half of the sheet, I found things that weren't on the first half, specifically "Transmission range switch signal A, P, B, C". It says to make wires going into the 411 connector. What are these? There were no unaccounted for wires coming from the trans. Is it for a manual?

Scottm · Jun 16, 2023

Also I didn't know to ask them to disable alternator codes and the fuel tank pressure sensor until I found those things in the Lextech sheet today. Will they be a problem?

xXxPARAGONxXx · Jun 16, 2023

Scottm said:
I did the 0411 wiring swap today on my 97 k3500. I got through the top half of the lextec sheet no problem. All old connector wires made it into the new connectors. But then going down the second half of the sheet, I found things that weren't on the first half, specifically "Transmission range switch signal A, P, B, C". It says to make wires going into the 411 connector. What are these? There were no unaccounted for wires coming from the trans. Is it for a manual?

If I were reading that, it means you need to make a circuit yourself, from the transmission range switch connector to the PCM connector. So, you will need a wire and a terminal corresponding to each connector (i.e., two total terminals, more than likely Aptiv/Delphi terminals). And then of course you will need to have a proper crimping tool, or tools, because if it's not a proper crimper, you're not likely going to seat the terminals into their connectors. And you will likely need a seal for the terminal at the transmission connector, as it likely a sealed terminal.

Scottm · Jun 16, 2023

Thanks Para, you are right. It's all explained in a note on the first page that I forgot about.

Spareparts · Jun 16, 2023

I believe 1998 and later did not need that. Mine did not and it worked fine.

12200411 PCM swap for 1996 to 2000 GMT400 trucks

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