I have a 2003 Cadillac STS. All of a sudden 2 days ago the auto door locks, rear defog, deck lid open, gas door open, rear heated seats and sun...

Hello and welcome to ExpertHelp.com! My name is Relly De Jesus and I'm going to do everything in my power to answer your question to your full satisfaction!

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Hi Scott

How are you doing? As a first course of action, I strongly suggest that you remove the negative battery connector and let it sit for 5 minutes before reconnecting it. This will reset the system and can resolve the issue. If the problem persist there's a possibility that the BCM is faulty that's why the codes are present.

The BCM (Body Control Module) is the electronic control unit that monitors and controls all of the systems in the car body. Electric windows,A/C functions, electric mirrors,electric locks,security systems, etc. It communicates with all the other modules via the cars vehicle bus. It's like the brain of the electronic function inside the vehicle and may need replacement to resolve the issue.

Hope this helps and please let me know if there's anything else I can add or help you with. I'll be standing by for your response.

Thank you

Relly

Dear Scott, It was a pleasure helping you with your Cadillac issue today. Here is a summary of the resolution.

Issue identified : Electrical Malfunction
Solution Implemented : Provided reset procedure and possible replacement of BCM. Reset procedure worked. Solution Accepted.
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