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Home >> GMC >> 1972 >> Jimmy 5.0L Eng VIN F, Automatic Trans, Trans Mfr CD THM350 >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Computer Command Control >> Operation >> CEC Solenoid

CEC Solenoid

CEC solenoid controls deceleration rate and routing of vacuum to distributor. CEC solenoid maintains a preset RPM during deceleration until transmission is downshifted. When downshifted, circuit is broken to CEC solenoid, allowing plunger to de-energize, thus blocking vacuum to distributor during idle and low gear operation.