Mikchek

I just installed a new Pioneer AVH-4400NEX head unit in my 2007 GL450 and its been working fine but sometimes my GPS will jsut get lost. I mean it will have me somewhere I'm not even close to and obviously it cant guide me if it doesn't know where I'm at.

I'm doing my best to determine if it is a issue with the head unit, the wireless carplay, or if the installer missed something during the install.

Any help would be greatly appreciated.