Good afternoon,
According to Alldata the ICM is on the side of the ignition coil. I attached a picture for you to view of the module.
https://www.rockauto.com/en/catalog/isuzu,1989,impulse,2.3l+l4,1176151,ignition,ignition+control+module+(icm),7172
Why are you replacing this module? did someone check it for you and confirm the failure?
Roy
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Wednesday, December 19th, 2018 AT 1:17 PM