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It looks like a plug sticking out of one of your exhaust manifolds. Make sure the engine is cold, then go searching for it. I found mine underneath the car on the exhaust system. It was between the manifold and the cat. convert. Took less than 1 min to replace and part cost was $45.00
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What is the spark plug gap for a 1992 GMC Sonoma with a 4.3 liter engine?
35
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How do you flush the raditor on a 1992 GMC Sonoma Pickup.
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Under the hood.
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11
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gmac05062013c
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