I have 2015 Chevy Silverado midnight edition LT 1500 and I want to swap to tow mirrors but want to know what my options are with extras that tow mirrors provide. The only option I know I have with the stock is power rotating of the actual mirror and don’t believe I have defrost. Does the wiring harness in the door provide capability for turn signals or power extension? Or am I limited to basic tow mirrors?