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its a 4.3 so its a 6 cylinder truck which means it has 6 spark plugs check the plug wires from the master cylinder replace all of them and all 6 spark plugs and you should be fine. if even one of those is no good and your running on 5 cylinders you will sputter and you will even have shifting problems

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14y ago
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Q: What causes a Chevy blazer 4.3 vortech motor to sputter?
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