Is your 2008-2013 Cadillac CTS experiencing bizarre electrical issues? A faulty Body Control Module, or BCM, is often the culprit behind these frustrating problems. The BCM acts as the central nervous system for your vehicle’s body electronics, controlling everything from the power windows and locks to the interior lighting and security system. When it fails, it can create a cascade of seemingly unrelated symptoms that can be difficult to diagnose.
This is a direct-replacement Body Control Module for your Cadillac CTS and a wide range of other GM vehicles. To ensure a seamless installation, we program the module to your vehicle’s specific VIN before it ships. This means it arrives ready to install, loaded with the latest software updates from GM, eliminating the need for an expensive trip to the dealership for programming. Simply provide your VIN after purchase, and we’ll handle the rest.
We had a 2011 Cadillac CTS come into the shop with a laundry list of complaints. The dome lights would flicker randomly, the driver’s side window would only work intermittently, and the dash would occasionally display a ‘Service Theft System’ message. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic scanner, we found multiple communication loss codes with the BCM. We installed a VIN-programmed module, and all the electrical gremlins vanished. It’s a perfect example of how a single failing module can wreak havoc on a modern vehicle’s systems.
Common Failure Symptoms
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Erratic interior or exterior lighting behavior.
- ✔ False ‘Service Theft System’ or other security-related warnings on the dash.
- ✔ Radio or climate control malfunctions.
- ✔ Key fob not being recognized or working inconsistently.
- ✔ Diagnostic trouble codes (DTCs) related to communication loss with the BCM.
Restoring Functionality with a Programmed 2008-2013 CTS Body Control Module
Don’t let a faulty BCM compromise your vehicle’s comfort and security. This replacement unit is the most reliable and straightforward solution. By matching the programming to your VIN, we ensure all factory-installed options and features are correctly recognized by the new module. This is a critical step that is often overlooked, but it’s essential for proper function. This 2008-2013 CTS Body Control Module is your key to resolving those persistent electrical issues and restoring your car to its proper operating condition.
Installation and Required Procedures
While this module is programmed for your vehicle, some GM platforms require a security handshake between modules after installation. Depending on your specific vehicle, you may need a qualified technician with a professional diagnostic tool to perform one or more of the following procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, the ‘Setup SDM Primary Key in BCM’ procedure is necessary to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: A recalibration of the brake pedal position sensor may be required to ensure correct brake light operation and to satisfy the traction control system.
This BCM is a guaranteed fit for part number 25847589 and is a direct replacement for the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
Frequently Asked Questions
What does a Body Control Module do on a Cadillac CTS?
The BCM is a computer that manages and controls the vehicle’s body-related electronic accessories. This includes power windows, locks, mirrors, interior and exterior lights, the security system, and often parts of the climate control and radio.
Is this BCM ready to install out of the box?
Yes, for the most part. We pre-program the module to your vehicle’s VIN before shipping, so it’s loaded with the correct software. However, some vehicles may require a simple ‘relearn’ or ‘sync’ procedure for the airbag or brake systems after installation, which requires a professional scan tool.
Where is the BCM located on a 2008-2013 CTS?
On the 2008-2013 Cadillac CTS, the Body Control Module is typically located on the left-hand (driver’s side) of the dashboard, often behind the lower dash panel.
What happens if I don’t provide my VIN?
We cannot ship the module without your vehicle’s 17-digit VIN. The programming is essential for the BCM to work correctly with your car’s specific options and security system. An order without a VIN will be placed on hold.
Will this fix my ‘Service Theft System’ warning?
A faulty BCM is a very common cause of a ‘Service Theft System’ warning on these vehicles. While not a guarantee for every case, replacing a failed BCM with our VIN-programmed unit often resolves this issue.