Radio and clock display doesn't work but radio plays fine
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2003 Pontiac Grand Prix Question: Radio display
Answer #1patrick mannion from Greg Solow's Engine Room, October 19, 2010, 19:41Master
The factory stereo display has failed and will need to be repaired. There are many companies that specialize in repairing original factory stereos http://www.carstereohelp.com/strpontiac.htm
will give instructions on how to remove the stereo and perhaps then google a original stereo repair facility near you to get an estimate for the repairs, it is a common problem based on your description their estimate will be close.
mastertech6371 October 20, 2010, 07:09Master
just to add to Pats answer, i have found in the past that a fuse for the power door locks controls the display portion of the radio. easy check before you remove the radio.