GM EV home charger appears to charge at a lower rate than expected; vehicle shows fewer kW than the charger’s rated output.

Steps:

• Check settings: In the GM app or charger interface, confirm the maximum current is set to the desired level and appropriate for your circuit.
• Check vehicle settings: Some GM EVs allow limiting charge current; ensure the vehicle is not set to a reduced rate.
• Monitor temperature: If the charger is hot, try reducing ambient temperature or improving ventilation.
• Utility programs: If enrolled in a utility program, check whether active events are limiting charging speed.

If the charger consistently delivers less current than configured and no external limits apply, internal sensing or control may be faulty. Professional diagnosis of the GM power module and sensors is recommended.