Watch Our How To Video. Ignition Coil Features & Benefits. Comes as a Set of 8. Replaces dealer part number: 12573190. Built to strict quality control standards. Note: GM used two different coils for these models: Melco-Mitsubishi (square shaped, OE # 12570616 or 12611424) or Delphi (round shaped, OE# 12573190). Please verify which coil your vehicle requires before ordering. WARNING: This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm. Our electrical and ...