89 Gmc Ecm Wiring Diagram. PICKUP GMC S15 1990 2DR PICKUP wiring information. FULLSIZE GMC JIMMY 1991 2DR SUV wiring information.
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The components on the right are controlled by the ECM based on the inputs it receives from the sensors.
Dea 500 series radio- 4 sp 93. Dea 500 series radio- 4 sp 93. I do not know where the gray one goes unless this is the tach sort of confused with the white gray wire as the diagram shows the white wire as the tach. The diagram is surrounded by a alphanumeric loaction grid.