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Home >> GMC >> 1974 >> Magnavan >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Computer Command Control >> Maintenance & Testing >> Transmission Switch

Transmission Switch

Start engine and put transmission in reverse (Turbo Hydra-matic) or high (manual).

NOTE: Power-glide equipped cars must have rear wheels off ground.

When transmission is placed in position required for test, CEC solenoid should energize. If it does not, check transmission switch by removing double connect at reversing relay. If solenoid energizes, replace transmission switch.

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