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What is the spark plug firing order for a 1983 Chevy truck?

The firing order for a 1983 Chevy truck depends entirely on the engine size. Chevrolet trucks in 1983 used several different engines. You must specify the engine displacement (e.g., 2.8L, 4.3L, 5.0L, 5.7L, 6.2L, etc.) to get the correct firing order.