This is the chime. Mounts under the dash driver's side passthrough connector on right upper side. Speaker holes are to the left. usually removed to STFU over door open key in, seatbelt, engine meltdown, etc.
Any you wondered why your rig was so quiet? The Air filter is an oiled "engine duster" and it's soaking into your seat. Yuck! Both items can go into the trash.
The HVAC wire that melts and control head issues are dead horse beat here.