ANSWERS: 2
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I had the same problem, but mine is a 93 2.8... may be the same order. it went front on the left was 1, back right 2, front middle 3...etc.... if you're still unsure, you can go to your local parts store and ask them to find the information for you, they could find it.
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1-3-4-2 according to this page: http://www.crankshaftcoalition.com/wiki/GM_firing_orders#Chevrolet
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