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Home >> GMC >> 1972 >> P35/P3500 Van 4.1L Eng VIN L >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Computer Command Control >> Maintenance & Testing >> CEC Solenoid
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CEC Solenoid

Check for free movement of solenoid plunger and for incorrectly adjusted plunger (out too far). With ignition off, solenoid should de-energize. Remove one lead from solenoid, turn ignition on and solenoid should de-energize. If solenoid does not de-energize it should be replaced.