P0789 Chevrolet Shift/Timing Solenoid Intermittent
Possible causes
– Low transmission fluid level
– Dirty transmission fluid
– Faulty shifting solenoid valve
– Shifting solenoid valve harness is open or shorted
– Shifting solenoid valve circuit poor electrical connection
– Dirty transmission fluid
– Faulty shifting solenoid valve
– Shifting solenoid valve harness is open or shorted
– Shifting solenoid valve circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)