Radio system I have a 2003 Cadillac Deville DTS. One minute I was listening to my radio (which also powers the navigation system, dvd player, etc, but all is factory built), and I turned the car off to go in the store, come back to start the car and nothing that has to do with the radio system works at all. What could be wrong?

Question edited. So few words, so many mistakes :>D

Here is everything you need.

CADILLAC Car Radio Stereo Audio Wiring Diagram ...

https://www.tehnomagazin.com > CADILLAC-Car-Radi...
GM car radio wiring connector audio. The factory wire colors given are typical of most GM vehicles. Delco CDR-500. ( A 4 - +12 V Direct) ( A5 Antenna Output ...

2004 cadillac deville dts radio wiring - The12Volt

https://www.the12volt.com > installbay > forum_posts
Jan 18, 2009 · 5 posts · 2 authors
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I have a 2003 Deville...battery is under rear seat ...pull seat up and out to raise....battery itself is very easy to change out.
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Behind the harmonic balancer. Front of engine , lowest pulley on the engine. Takes a puller to get it off.

Cadillac codes are easy to read..then replace the bad sensors etc and then clear the codes and try again etc

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These details will help.

Thanks.

flat battery activates the anti-theft code for the radio
you will need to get it and put it in the radio for it to work

You need to gete the radio security code and enter it in. Just call or drop by the dealer and theye can give you the code or enter it. Should be free but your dealer may vary. When you changed the battery and lost power the radio goes into a secure mode just in case it was stolen. The code should be about 4 digets long so its not a big thing to enter. its keyed to your vin number so the d ealer may want to see that as well as your registtration and maybe a drivers licence depending on how paranoid they are.

MMY 2003 DTS HAD SAME PROBLEM. REPLACED FRONT COIL PACK AND FIXED THE PROBLEM. LATER #3 CYLINDER STARTED MISSING, REPLACED REAR COIL PACK AND SOLVED PROBLEM HOPE THE HELPS

disconnect battery for 5 minutes and reconnect.

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