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ECM what years compatable?

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Old Jun 14, 2010 | 10:10 AM
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oliver foster's Avatar
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ECM what years compatable?

I was wondering what years work with other years.
I am assuming that a manual ECM would not work for an auto truck?
I see they change the wiring harness in '92
Thanks for the help!
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Old Jun 14, 2010 | 03:57 PM
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From: Quinton, New Jersey (middle of nowhere)
92-93.
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Old Jun 14, 2010 | 04:10 PM
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So all the ECM are the same '89-91.5
then different again 92-93.
Manuals and autos interchange fine?
Thanks,
Crossy's son
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Old Jun 14, 2010 | 04:16 PM
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The '91.5 is the oddball. All the non-intercooled control boxes interchange though.

The '92-'93 automatic trucks need an automatic PCM.
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Old Jun 14, 2010 | 04:56 PM
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My understanding is that Auto PCM will work with manual trannys but not the other way around. I'm sure someone will jump in here if that is wrong.

Bob
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Old Jun 14, 2010 | 07:42 PM
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So a auto '91.5 will need another '91.5 auto ECM?
Thanks
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Old Jun 14, 2010 | 09:13 PM
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Yes.
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Old Jun 15, 2010 | 06:47 AM
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Thanks, Wannadiesel
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