What V8 engines have cylinder 7 issues?

GM V8s with AFM/DFM (cylinder deactivation) sometimes have specific cylinder issues. Check for AFM-related problems.

Is P0307 an emergency?

If the check engine light flashes, yes — pull over. Steady light means you can drive to a shop.

High Severity

Ignition System

Cylinder 7 is misfiring. Only on V8 engines.

Common Fix

Replace spark plug or coil

Estimated Cost (DIY)

$5 - $80

Bad spark pluglikely

Faulty coillikely

Bad injectorpossible

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What V8 engines have cylinder 7 issues?: GM V8s with AFM/DFM (cylinder deactivation) sometimes have specific cylinder issues. Check for AFM-related problems.
Is P0307 an emergency?: If the check engine light flashes, yes — pull over. Steady light means you can drive to a shop.

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