Question about 1998 Cadillac DeVille
I did loosen the ground cable but I made sure it was tight when I put it all back together
Try using a scanner to reset the CPU program as removing the battery often corrupts the CPU program and alarm systems.
Posted on Apr 21, 2014
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Posted on Jan 02, 2017
SOURCE: 1998 cad alarm no start
Your GM product has a safety alarm, it shuts down the radio , or locks it.
I send ours to a GM dealer to get it unlocked. They don't give those codes out.
Posted on Jan 15, 2009
it will need it to be disconnected. have a shop or alarm shop disconnect it, wires may have to be spliced back together for everything to work properly, you cant just unplug it.
Posted on Oct 20, 2009
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.
Posted on Aug 17, 2012
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