12200411 PCM swap for 1996 to 2000 GMT400 trucks

[Scottm]

So another question. My truck is a 97 L29. The egr is one of several items that are powered by the ENG-1 fuse under the hood. The Lex sheet says to cut the egr connection to the ENG-1 circuit and cap off the hot end. Then run a new wire from the egr to pin C2-7 on the 0411. Does that mean C2-7 becomes a positive voltage output, just for the egr motor? Why not leave it wired to the ENG-1 fuse circuit? I contacted lex and he's not sure anymore.

 

[Supercharged111]

So another question. My truck is a 97 L29. The egr is one of several items that are powered by the ENG-1 fuse under the hood. The Lex sheet says to cut the egr connection to the ENG-1 circuit and cap off the hot end. Then run a new wire from the egr to pin C2-7 on the 0411. Does that mean C2-7 becomes a positive voltage output, just for the egr motor? Why not leave it wired to the ENG-1 fuse circuit? I contacted lex and he's not sure anymore.

Just follow what the sheet says. The 411 does EGR differently than the blackbox. If you just pin it in and go the truck will run like crap if you're trying to keep the EGR functional.

 

[Scottm]

I saw posts a long time ago about finding a spare output on the 0411 to work a radiator fan relay. Has that been figured out?

 

[Supercharged111]

I saw posts a long time ago about finding a spare output on the 0411 to work a radiator fan relay. Has that been figured out?

It's not a spare output, it's an existing feature. How it works can vary based on OS, but mine runs a MKVIII e-fan on my 1500 and the factory aux pusher on my dually.

 

[Scottm]

Yeah my dually has the pusher fan too. I guess you could power a second relay with the same output for a rad fan, but might there be another that could be used independently?

 

[Supercharged111]

Yeah my dually has the pusher fan too. I guess you could power a second relay with the same output for a rad fan, but might there be another that could be used independently?

I have the option of an aux fan, parallel fans, and something else that escapes me. There's not much you can't do fan-wise with the 411.

 

[Scottm]

I am finishing the details on my 411 swap. It has two fan outputs, blue-42 runs the pusher, and red-33 comes on if temps continue to rise. Black bear enabled it, but I don't know when it's supposed to come on. Also the fan relay outputs are actually grounding, right? So +12 volts go to the relay coil and the ecm completes the ground.

 

[Supercharged111]

I am finishing the details on my 411 swap. It has two fan outputs, blue-42 runs the pusher, and red-33 comes on if temps continue to rise. Black bear enabled it, but I don't know when it's supposed to come on. Also the fan relay outputs are actually grounding, right? So +12 volts go to the relay coil and the ecm completes the ground.

Correct. BB can tell you the temps for those fans, I'd be curious on the second. The pusher should come on with AC as well regardless of temp.

 

[pacobtown336]

I have a 1997 chevy tahoe 5.7l 4wd wanting to swap the black box for the 0411. How do I get the rep in and more info about it?
Email is [email protected]
And also does anyone knows if I could purchased the 0411 already programed?

 

[xXxPARAGONxXx]

I have a 1997 chevy tahoe 5.7l 4wd wanting to swap the black box for the 0411. How do I get the rep in and more info about it?
Email is [email protected]
And also does anyone knows if I could purchased the 0411 already programed?

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