Chevrolet GMC Buick Regal Ignition Coil 12638824/12578224

For 4-cylinder Chevrolet, GMC, and Buick Regal models, this ignition coil (OEM: 12589623, 12638824, 12578224) converts low voltage to high voltage to provide stable ignition energy for the spark plugs. It mounts directly above the cylinder head and can effectively resolve typical symptoms such as idle hesitation, sluggish acceleration, check engine light, and rising fuel consumption. Replacement difficulty is medium; labor about 1–1.5 hours. Pay attention to order of removal and dust sealing to prevent contamination affecting ignition efficiency.