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Old 06-13-2019, 09:05 PM   #1
kwmech
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Wiring diagram 1990-91 suburban

Finishing up the wiring on my 4L80e conversion and have to wire the controller into the factory ECM. Trying to figure out which wires are which. Any one have a diagram of the pigtails going into the ECM or a whole harness pic?
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Old 06-14-2019, 06:36 PM   #2
starterman99
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Re: Wiring diagram 1990-91 suburban

I have a Mitchell wiring diagram. I could scan and send to you if it would help. PM an email if you want it.
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Old 06-15-2019, 02:22 AM   #3
kwmech
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Re: Wiring diagram 1990-91 suburban

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