Installed a sony radio in my car and the radio often times will shut off shortly after I start the car.?

2005 Pontiac Sunfire. Sony xplod head unit. Scosche GM2000 wire harness with included data bus. The unit seems to still be getting power since you can eject CDs. Replaced the Sony twice and the Scosche harness twice. Seemed simple enough to install. Problem still occurs. Any help would be greatly appreciated!|||um.... i have no idea. am i getting out of this you have had 2 sonys in your car? if you know anyone with a deck try their deck in your car, if theirs work and yours still doesnt there is probably something wrong with the sony. try a different brand.