I turn the key to start and nothing.The lights do not dim when I turn the key.
If the lights don't even dim just a little it could be a couple of things, starter open circuit, ignition switch or wiring failure, anti-theft system active if equipped.
Or neutral safety switch. HTH. -Jim
Search Cadillac DeVille Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Cadillac DeVille Experts