A:AnswerAfter setting the correct time for your zone, the time will remain constant when the engine is running, but not when CD player, tuner, etc..is in use…
A:AnswerThat really depends on your level of installation. It has been done, just disconnect the battery so the the oem unit doesn't short out. There's a few videos on YouTube that will show you.
A:AnswerThe Stereo I replaced did not have the same wiring harness. if the harness you have is bigger than about an inch, it won't be. (I had a GT570UP)