Operation CHARM
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GMC Truck
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1999
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S15/T15 Sonoma P/U 2WD L4-2.2L VIN 4
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Description and Operation
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Ignition Coils
Ignition Coils
Two separate coils are mounted to the
ignition coil
assembly. Each coil provides the spark for two plugs simultaneously (waste spark distribution). Each coil can also be replaced separately.