Installing Factory Foglights in a 2008 LS Sedan and wondered if someone else has done this in the past? Is there a separate wiring harness for foglights or was this like the Geo Metros most of the wiring was already in place you just need to dig it out. (As an example put in a factory cassette player in a '90 Metro and wanted rear speakers. Needed only to get speakers as wiring was already in place.) If I need a harness is there actually one to buy? GM part number? Or do I make my own with proper connectors for factory foglights? Lots of questions, thanks in advance.