HomeAll RepliesReply To: HDMI AND USB-C PORTS NOT WORKING IN 2021 GMC YUKON Reply To: HDMI AND USB-C PORTS NOT WORKING IN 2021 GMC YUKON Sponsored June 18, 2023 at 9:27 pm #766050 legg24Participant Any updates on this. My USB-C works intermittently. Sometimes the system recognizes it, sometimes it doesn’t. Incredibly frustrating. This reply was modified 1 year, 8 months ago by legg24. Sponsored Subscribe to GM Authority For around-the-clock GM news coverage We'll send you one email per day with the latest GM news. It's totally free. First Name Last Name Email Address Subscribe via Email Leave this field empty if you're human: Sponsored