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Spark plug firing order for a 1985 GMC S-15 2WD, 2.8L PICKUP TRUCK

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Firing order is 1-2-3-4-5-6, clock wise rotation on distributor. Also cylinders 1-3-5 are on the right (passenger) side and 2-4-6 on the left (drivers) side, front to rear.

Posted on Dec 16, 2016

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Posted on Jan 02, 2017

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