P0765 GMC Shift Solenoid D Malfunction

Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty shift solenoid ‘D’ valve
– Shift solenoid ‘D’ valve harness or connectors
– Shift solenoid ‘D’ valve circuit is open or shorted

What about the obd code?

The P0765 GMC code is detected when the ECM detects an improper voltage drop when it tries to operate the solenoid valve.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission will not shift gears

P0765 GMC Description

Shift solenoid valve ‘D’ is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.