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ECM Pin Layout

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Old 04-19-2022, 07:49 PM
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Default ECM Pin Layout
I need the ECM pin layout for a 1998 C3500 2wd 7.4L OR tell me where I can find it.

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Old 04-19-2022, 09:35 PM
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Here'* the main shot.





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Old 04-20-2022, 09:21 AM
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If you goto alldata.com, you can get a one month subscription for $20 and get all the schematics you need/download. Plus how-to'*, specs etc. It would take a couple hours to peruse all the schematics then download them. Well worth it.
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