Hi, recently picked up a 2019 XT5 and would like to install the illuminated cargo area and front door sill plates. Does the wiring all ready exist? Also has anyone had experience with performance chips, that plug into the OBD port? Such as the JDM Pro-AM. Lastly any suggestions from XT5 / XTS owners to improve / enhance the Cadillac experience, it's all new to me, 1st. big splurge. Thanks, Rusty