Difference between Red/Blue DBC and Green/Blue DBC harnesses?
Difference between Red/Blue DBC and Green/Blue DBC harnesses? I have a 2004 6.0/80E that came as a full dropout with PCM, out of an Express box van with DBC. The harness that came with it is pretty trashed, so I got a deal on a universal harness that is set up for DBC; only catch is that is has red/blue PCM plugs. I am in the process of comparing the pinouts for a 99-02 DBC PCM to '04 Express van DBC PCM via LT1swap.com.
Are there any major differences between the generations that will cause issues and require repinning at the PCM connectors?
Are there any major differences between the generations that will cause issues and require repinning at the PCM connectors?
If the harness is setup for a red/blue pcm, if you change the Caps on the connectors, you'll be able to plug the blue/green p m in it and run it. There will be some DTC's that you will need to turn off to keep the CELoff
Thanks for the tip. I ended up comparing the two pinouts in a spreadsheet and found only a couple minor discrepancies more so in the descriptions of things. Gonna just send it and run the engine on a test stand to see how it works.
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How'd this work out? Exact same deal with me , wondering if clips alone worked or if u had to repin the few discrepancies listed on lt1swap.com thanks in advanced
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I'm told that there were two generations of dbw hardware, and you'll need a newer (05 or later) operating system in the p59 to work with a newer ((05 or later) TAC module. I think the pedal and throttle body might have changed at the same time, but I don't actually know.
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Going with an ls1 intake so it will be DBC and it happened to be drive by cable already. The donor vehicle was a 2003 savanna van with a 6.0 . The original harness looked beat up so I ordered a red/blue DBC harness for a 4l80 with ev1 injector plugs. The pin outs look very similar , I was hoping someone had some guidance on which pins needed to be moved to work with the blue/green PCM . Here's some pics of my project since I'm new to the forum . They're actually in order backwards from most recent to oldest somewhat. It's a 68 c10 long bed to shortbed conversion with ls swap. 🤟🤟
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Here is attachments of where I am at, I highlighted in orange the ones I'm not sure of and made some notes. Not sure of where to get pin 72 from off of for green connector and pin 29 for blue connector. Do the other ones seem right? Hopefully someone could provide some insight and this would help anyone else running an express van motor.
Last edited by Gustavo Gallo; Jan 6, 2021 at 12:51 PM.
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I apologize if I didn't specify but I will be running DBC/4l80e/6.0/ with an ls1 intake Ev1 style plugs. The pcm is blue green but the harness I have is red/blue for DBC. The original harness looked pretty beat up.
It's been quite awhile since I swapped mine from a 0411 ecm to a P59. There really isn't a lot of difference in the wiring. The big one that comes to mind on my application, was the factory tach won't work without wiring in a pull-up resistor. The P59 is setup for different O2's. You can just turn those codes off in the tune. It's not disabling the O2's, just turning off the heater code issue. There are more grounds in the P59, but many guys have ran without them. I personally wired mine in. I believe the only other thing I remember running across was I believe a wire on the alternator.
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From: Bossier City, Louisiana
To turn off the O2 heater DTC's (but not the heaters), what exactly gets strangled in the tune? Is that one of the "P" DTC's or something else? I have a list of things to do in the OS but I must be missing this one.
Many thanks,
Rick
Many thanks,
Rick
It's been quite awhile since I swapped mine from a 0411 ecm to a P59. There really isn't a lot of difference in the wiring. The big one that comes to mind on my application, was the factory tach won't work without wiring in a pull-up resistor. The P59 is setup for different O2's. You can just turn those codes off in the tune. It's not disabling the O2's, just turning off the heater code issue. There are more grounds in the P59, but many guys have ran without them. I personally wired mine in. I believe the only other thing I remember running across was I believe a wire on the alternator.