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Home >> GMC >> 1993 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - 4L60-E >> Diagnostic Code Charts - (Passenger Vehicles) >> Code 90, TCC Solenoid Circuit - 3.4L "F" Body, 4.3L & 5.7L >> Diagnostic Aids

Diagnostic Aids

Check all connections to transmission pass-through connector. An open in the ignition feed circuit will cause multiple codes to set.

Fig 1: Code 90A - TCC Solenoid Flowchart

G94C31965

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