Noticeable buzzing, humming, or clicking noises from the GM EV home charger during operation, louder than when new.

Safety first: If the noise is accompanied by burning smell or heat, stop charging and turn OFF the breaker immediately.

Steps:

• Compare to normal: Some low‑level hum is normal. Sudden increases or rattling are not.
• Check mounting: Ensure the charger is firmly attached to the wall and that all external mounting screws are tight.
• Listen pattern: A single click at start and end of charging is normal; rapid or repeated clicking suggests a failing contactor.

Internal mechanical components are not user‑serviceable. If noise is excessive or worsening, have a technician inspect the GM charger; replacement of the main contactor or power module may be required.