18-5176 - COIL 584561
Replaces OEM #0584561. IGNITION COIL KIT Replaces: 582366, 583737, 584561
The Sierra 18-5176 does replace the earlier coils as shown, although the style of coil has changed over the years for the Sierra and the OEM. The black wire on the Sierra coil is the ground. On some of the other coils the ground is through the strap on one of the mounting bolts. Do not be alarmed that the Sierra coils has more wires, it is just the result of how they have done the ground.