Sony radio remove

I have a 98 S-10 that had a bad factory radio so I installed a (used) Sony x-plod radio. It worked for about a year in the truck and now suddenly no radio. CD player works fine. Anyway, I'm trying to remove the radio to check the antenna wire to it and can't get the radio out. Is there some kind of tool like Kenwood has to remove the radio? Thanks

I really don't know much about newer Sony stuff

The Sony radio Cd player is probably 7 or 8 years old.

ok, the last Sony I had I purchased in 1990

I found the answer on sony's web site. I guess I'll have to find a couple of Sony keys to unlock it from the housing.

I wonder if they are similiar to the alpine ones.