The P0753 code in your 2022 GMC Terrain indicates an electrical problem in the shift solenoid A circuit. Unlike performance codes that describe solenoid behavior, P0753 specifically identifies an electrical fault—a short, open, or incorrect resistance in the circuit controlling shift solenoid A.
Electrical Circuit Diagnosis
The shift solenoid A circuit includes the solenoid coil, wiring from the TCM through the transmission connector, and the internal transmission harness. P0753 triggers when the TCM detects abnormal electrical characteristics that prevent proper solenoid control.
Common Causes
A failed solenoid with an open or shorted coil is common. Damaged wiring between the TCM and transmission connector. Corroded pins at the transmission connector affecting circuit integrity. Internal transmission harness damage. Poor grounds affecting solenoid operation.
Symptoms in Your Terrain
Shift issues related to the 1-2 shift circuit may occur. The transmission may feel harsh or delayed in lower gears. The check engine light illuminates with P0753. The TCM may adapt by using alternative shift strategies. Other gears may work normally if only solenoid A is affected.
GM Diagnostic Approach
Using GM GDS2, check shift solenoid A circuit status. Test solenoid resistance at the transmission connector—compare to specifications. Check for voltage at the solenoid when commanded. Inspect connector terminals for damage or corrosion. Test circuit for shorts to ground and opens in the wiring.