Use a wiring diagram to identify the hot wire supplying power to the parking lights (amber) out of the Generic Electronic Module (GEM). With the lights off there should not be power coming out of the GEM module hot wire to the parking lights. If there is power then the relay to the parking lights in the GEM is stuck. The headlights have a matching relay in the GEM and you can splice the parking lights into that hot wire (for the headlights). The GEM is unique to your vehicle by VIN number and you cannot replace any of its components, which consists of about a dozen relays and a microprocessor (computer). The unit has to be replaced and that involves a download of your specific programming, removal of the GEM, replace the GEM and reload your programming into the new GEM. This is about a $500 to $600 job. Finding an exact match to your GEM (programming) in a salvage yard is a million to one proposition.