I don't know if you solved your e 20 cd player error, but I just bought a 2001 pontiac grand prix also and get the same problem. I got in touch with the local pontiac dealer and they told me that it was a problem with the cd player and it most likely needs replacing - but I still think it's fixable. If you get the message, then let me know if you found the solution or not, or I can post here if I find the solution first. e-mail me at aj_tha_doc@yahoo.co.uk to let me know you're still interested AJ

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