Whenever you are replacing a coil or distributor, it's always a good idea to be sure to the ground clip is transferred from the old cap to the new. Variety of gm hei distributor wiring schematic. 1991 gmc sierra wiring diagram. Wiring Diagram 175851 Assortment of chevy hei distributor wiring diagram. Hei wiring diagram chevy . The colors of the leads determine the direction the coil is wound, which determines its polarity. These directions will likely be easy to comprehend and use. Chevy 350 hei distributor wiring diagram from ww2.justanswer.com. Diagram gm hei distributor module wiring picture 4 pin ignition general motors 7 control 1994 full a ford or mopar to free diagram gm hei distributor module wiring full version hd quality diagrame alternanzagiusta it diagram gm hei module wiring picture full version hd quality diagrammu accademia archi it diagram gm hei 4 pin ignition module… read more » Gm hei wiring pin diagram wiring diagram for chevy hei distributor for ig...