This is anew thread even though the problem on my 2025 GMC Sierra Denali sounds like the same problem as certain Chevy and GMC models. The Bluetooth connection using Android Auto is unusable for a phone call. It is appalling that I cannot make a call with this brand new vehicle. Further, when I try to switch the call to my phone or Bluetooth headset, the system tries to switch back to the GMC system. I have tried disconnecting and reconnecting, resetting the system by by disconnecting the negative terminal. GM has a problem here.