MY Chevy Silverado 2004 did the same thing after working perfectly for over a month since install. I unplugged the fuse under hood and switched the accessory relay with the identical park light relay and so far, it's working. You almost have to shotgun diagonose these things because Pioneer tech support is so weak. They almost refuse to adknowlege any issues and are sometimes even rude about it. I've been trying to get a straight answer about the clock issue for oregon owners for over a month and they say live with it. Any way, I believe I'm using the same interface module (with Chime) and I'l
