Hello i am a new guy here and have a question for all you guys/gals who know more about the Montecarlo than i do. I have a 2003 monte ss 167k miles but only 7.5k or so on the engine. The question i have is do you need to buy a new wire harness to put in an aftermarket stereo receiver or is the guy i asked to put it in trying to screw me. also how much would one actually cost the guy told me $100 did not sound right.. I'll admit i don't know much about cars but love my monte even though i have only had it for a few months. just need to know before i waste $100 on something i might not need.