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Home >> Chevrolet >> 2002 >> Chevy Express G2500, Van Cargo, 5.0 M >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing >> Ignition System >> Ignition Relay Diagnosis (3.4L) >> Circuit Description
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Circuit Description

Ignition relay supplies battery positive voltage to ignition control module, fuel injectors, Mass Air Flow (MAF) sensor, oxygen sensor, transmission solenoids and A/C clutch relay.

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