Cylinder Identification and Wire Routing GM 3.4L

In this video I'll go over the firing order, cylinder identification, and ignition wire routing for a GM 3.4L V-6 (VIN E). The firing order is 123456. This is the order in which the cylinders are fired, not to be confused with the lay out of the ignition coils.

It's a very common mistake to rout the ignition wires incorrectly during wire replacement. If your vehicle is running roughly after performing this task then check your wire routing using this video. Chances are that you may have a couple wires routing incorrectly.

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