2003 Cadillac CTS w/ NAV - just bought a few months ago.
Ok so here is the scoop. I had a local shop change my engine because of the #6 piston fried. It was all authorized thru the GM Protection Plan warranty and even though this took forever (3 weeks); engine wise was running fine when i got it back. Well then I drove the car back that night and everyday since then I have a bunch of electronic problems.
-The doors will lock and unlock repeatedly by themselves
-The traction control will turn off
-The Theft deterrent system will be tripped
-1 touch power up windows occasionally will not work
-The AC compressor will stop working (fan still blows)
-The temp gauge and fuel gauge will drop to 0.
-sometimes the key will get locked in the ignition and the engine will not start (probably due to the theft deterrent system tripping)
-the car always hinders when it is about to turn over
The shop then blamed this on my battery, so they changed it out ($140) and I asked them to keep my battery in my trunk. I then made it about 7 miles from the shop and everything started happening again. I then tested the battery at a local Auto Parts store and my battery tested fine.
Now the shop is telling me that they tracked down the issue and it is the "ignition lock cylinder case", which they have now ordered. My question is I don't know if this would hinder the operation of all of these electronic components? I can understand if the theft deterrent system was not getting the correct voltage or power then it would falsely tell the ignition cylinder lock to activate. But why would this "ignition lock cylinder case" control all of these components?
Is this guy throwing parts at the vehicle or does anyone know if he is correct with his diagnosis???? Any help would be greatly appreciated.
I am personally thinking there is a loose ground or a pinched wire/wiring harness somewhere. Thanks!