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What is the firing order for Chevy G20 van 4.3L?

The firing order for a Chevy G20 van with a 4.3L engine is:

1-8-4-3-6-5-7-2

This means that the spark plug in cylinder #1 fires first, then cylinder #8, then #4, and so on.

Important Note:

This firing order is for the small-block Chevrolet V6 engine (VIN code "W" or "R"). You should always consult your owner's manual or a reputable repair manual for specific information about your vehicle.