I want to upgrade review mirror

[jethrobodean]

I have a plain jane 05 tahoe and I want to install a reveiw mirror with the compass/ outside temp/onstar with the self dimming option. I was wondering if the wiring was already there under the headliner for the power to the auto dim and compass. I dont want the onstar. but the outside temp would be nice. Is the wiring there to hook up the all in one reveiw mirror? Would the wiring be easy to find to install the outside temp sensor? or am I dreaming. tell me what i need to do.

 

[ezstriper]

your best bet is to get a aftermaket unit, will instal much easier and look oem