Service Theft Alarm

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, Service Theft Alarm in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; I have looked at the threads on this subject but I have't come across a solution. My 2005 CTS was ...
  1. #1
    grangeme is offline Cadillac Owners Member
    Join Date
    Mar 2012

    Service Theft Alarm

    I have looked at the threads on this subject but I have't come across a solution. My 2005 CTS was serviced this week during which the battery was changed. When I went to start the car, the service theft alarm message showed up on the DIC and the dash warning light was on. The car starts and runs normally but every time I switch on the ignition, the message appears. Do we know what the cause is? I assume it was related to the old battery dying and the new one being fitted.

  2. Remove Advertisements

  3. #2
    Cadillac Cust Svc's Avatar
    Cadillac Cust Svc is offline Cadillac Customer Service
    Join Date
    Mar 2010
    Detroit, USA

    Re: Service Theft Alarm

    Grangeme, I'm sorry this has been frustrating you! Your owners manual (page 3-72) gives the following information on the subject.

    "'Service Theft System' message means there is a problem with the
    immobilizer. See Immobilizer on page 2-19 for more

    A fault has been detected in the system
    which means that the system is disabled and is
    not protecting the vehicle. The vehicle usually restarts,
    however, you may want to take your vehicle to your
    dealer before turning off the engine."

    Therefore, I do recommend taking your Cadillac in to your dealer for service. And if you would like me to research further for you or schedule an appointment at your dealer on your behalf, please email me anytime at!


    Cadillac Customer Service

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts