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Why GMC Envoy engine jolts?

Updated: 12/11/2022
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10y ago

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if jolt means engine stumbles or misses when power is needed or shakes at idle usually its a bad ignition coil each cylinder has a coil on top of each cylinder.check for codes and look for a misfire code also replace all spark plugs as worn plugs tend to burn out coils because they have to work harder to work harder to jump worn spark plug gaps

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10y ago
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Q: Why GMC Envoy engine jolts?
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