Hey all, I was just wondering if any of you knew if the stock cd player in a 99 grand prix is amplifier ready? If someone could help me out on this that would be awesome. thanks

On the standard Delco system (without the GTP amplifier) it does not have line-level outputs. However, you can get the line-level converters or an amp with speaker-level inputs.

Here is a page that has the wiring diagrams for the three systems in GPs. enjoy.

http://mywebpages.comcast.net/alitaki/GrandPrix/audio.html

ferb!