Silverado 1500 2WD V8-4.8L VIN V (2006)
Ignition Coil: Description and Operation
IGNITION COILS
Each ignition coil has an ignition 1 feed and a ground. The PCM supplies a low reference and an ignition control (IC) circuit. Each ignition coil contains
a solid state driver module. The PCM will command the IC circuit ON, this allows the current to flow through the primary coil windings for the
appropriate time or dwell. When the PCM commands the IC circuit OFF, this will interrupt current flow through the primary coil windings. The magnetic
field created by the primary coil windings will collapse across the secondary coil windings, which induces a high voltage across the spark plug
electrodes. The coils are current limited to prevent overloading if the IC current is held high too long. The spark plugs are connected to their respective
coils by a short secondary wire. The spark plugs are tipped with iridium for long life and efficiency.
