So i made a post in november on the forums (UPDATED it with the resolution) where my engine was making a strange noise. Was the timing assembly. I get my truck back from the shop now my radio has no sound. its a 2004 Expy XLT. The radio comes on and everything looks fine except absolutely no sound. It is an aftermarket radio and it is a power acoustik pdti 8920 which i never had a problem with. Anybody has any idea what it could be? BTW i didnt install it. I bought it with the radio. I took it out and it seems to not be hooked with the speaker wire but the red and white output going to the something. i dont even know.