The ignition switch(key switch) on my 2004 bonneville had been giving me trouble and not wanting the let me turn the key. I bought a new key lock and installed it today and attempted to do the "learn new key" process, but it doesn't seem to be working. I followed these steps.
1. Turn key to ON and try to start truck then let it go back to ON and leave sit foapproximatelyly 10-15 minutes and the Service Theft Deterrent System will go out. It never does.
2. Turn ignition off wait 5 seconds, and repeat step 1. two more times.
One thing I see is the Service Theft Deterrent System light never does go off like I've seen posted. What might I be doing wrong? I have a brand new lock and key installed.