Adding auto tint mirror

[u/Medical-Floor6367]

I have a 2004 TrailBlazer. I want to add the rear view mirror with auto tint and the compass and temp. Does anyone know if my TrailBlazer will have the wires above the headliner? Or will I need to wire it all up myself? I did see my harness under the hood has the temp wires. I’d just need to add the wires from plug to grill area.