Audio Systems: aftermarket stereo for 2000 chvy blazer,no sound, chvy, premium system


Question
i just bought a vrcd400sdu from virtual reality sounds at a walmart and i also bought the aftermarket wiring harness for my specific vehicle.well the face plate works but i get no sound at all. ive tested the speakers with a battery and if i plug the old stero in it works fine.all the wiring was pretty easy and should be right. im thinkin something maybe wrong with the stereo itself.ifyou have any suggestions it would be great

Answer
the stereo may be a dud,  I don't think the blazer was available with a premium system.  if it was there may be a factory "black box" amp hidden in the car that the old deck is activating to turn on but your new one isn't.  but I don't think this was an option for this vehicle.
if you can pull one of the speakers or if you have a speaker laying around you could try to hook it directly to one of the speaker outputs of the new stereo.  so basically it would have the black ground, the red ignition and the yellow battery wire all hooked up to the car but nothing else hooked to the car. and then you'd connect the speaker to one of the speaker outputs of the cd player.  If you know it's a good speaker but no sound this way then its definitely a bad unit.
Good luck!