Is there any way to replace the factory head unit in a 2000 Pontiac Grand Prix GTP that has Bose with an aftermarket unit short of rewiring the whole system?
no you either can keep all the bose and replace the hu only with special adapter or you have to rewire the car...
look it up idk about GTPs i just know about Lacs... axxess should make it... idk what pin set up you have on your radio.... this is what it looks like for the Lacs to give you and idea of what i mean http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150006134429&category=32812
ok i think this is what you need again idk for sure what the pontiac stereo plug looks like so youll have to judge http://cgi.ebay.com/ebaymotors/PAC-...ryZ38655QQssPageNameZWDVWQQrdZ1QQcmdZViewItem