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What is code P0303 Random Misfire Detected on a gmc Yukon and how do you repair it?

Anonymous

∙ 16y ago

Updated: 10/22/2022

P0303 is cylinder #3 misfire. P0300 would be random misfire. Either way you need to diagnose the case of a misfire. Check spark plugs, plug wires(if equipped), cylinder compression, fuel inectors, and wiring.

Wiki User

∙ 16y ago

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