Learn how to wire your GM HEI distributor and coil with this step-by-step diagram. Improve your engine performance with the right wiring setup.. The wiring diagram for the GM HEI distributor shows the various connections and components involved in the ignition system. Key components include the ignition coil, distributor cap and rotor, ignition module, and spark plug wires.
![[DIAGRAM] Gm Hei 4 Pin Ignition Module Wiring Diagram](http://gpzweb.s3-website-us-east-1.amazonaws.com/Ignition/GPZheiMod.gif "[DIAGRAM] Gm Hei 4 Pin Ignition Module Wiring Diagram")
![[DIAGRAM] Gm Hei 4 Pin Ignition Module Wiring Diagram](http://www.useasydocs.com/details/HEI_wiring.gif "[DIAGRAM] Gm Hei 4 Pin Ignition Module Wiring Diagram")
![[DIAGRAM] 5 Pin Gm Hei Ignition Module Wiring Diagram](https://images.msdperformance.com/blog_diagrams_and_drawings_6_series_hei_dual_connector_hei_module.jpg "[DIAGRAM] 5 Pin Gm Hei Ignition Module Wiring Diagram")
![[DIAGRAM] 5 Pin Gm Hei Ignition Module Wiring Diagram](http://gpzweb.s3-website-us-east-1.amazonaws.com/Ignition/HeiModules/Hei7pinDiagram.gif "[DIAGRAM] 5 Pin Gm Hei Ignition Module Wiring Diagram")
A detailed GM HEI wiring diagram guide for understanding ignition system connections, components, and troubleshooting methods for GM vehicles.. 2 Wire HEI Distributor Wiring Diagram for GM Ignition Setup and Coil Power Connections Connect the ignition unit using a two-lead layout: one conductor delivers switched 12-volt power from the ignition key circuit, while the second conductor links the module's trigger terminal to the ignition coil's control post.