I went to get my car inspected and the obd connector wasn't there so I went to a mechanic to try and locate it, after 15 mins of pulling wires and looking for it...by the way I have a 2006 impala police package.. ( allot of wires ) he couldn't find it.. SO I turn my car on and now my mileage doesn't show up and my heater ac ect is not working...any one know how to fix it?