Restore Full Electrical Function to Your Cadillac CTS
Is your 2008-2013 Cadillac CTS suffering from bizarre and frustrating electrical problems? Issues like malfunctioning power windows, erratic interior lights, unresponsive door locks, or false warning messages on the dash are often traced back to a single, critical component: the Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it begins to fail, it can create a cascade of seemingly unrelated issues that can be a nightmare to diagnose.
Don’t let a faulty module compromise the luxury and convenience of your Cadillac. This direct-replacement Body Control Module, part number 15948439, is the definitive solution to restore your vehicle’s electronic systems to perfect working order. We take the guesswork and hassle out of the repair by programming the module specifically for your vehicle using your VIN. This means it arrives at your door with the latest GM software updates, ready for a straightforward installation process.
From the Diagnostic Bay
We recently had a 2011 CTS in the shop with a list of complaints that sounded like the car was haunted. The dome light would flicker while driving, the driver’s side window would only work intermittently, and the key fob would sometimes refuse to lock the doors. The owner had already replaced the window switch and a battery to no avail. After hooking up our diagnostic scanner, we saw multiple communication error codes pointing towards the BCM. A failing BCM can send corrupt data across the vehicle’s network, causing other modules to act up. Swapping in a pre-programmed BCM like this one resolved all the issues in under an hour, saving the customer from costly and incorrect diagnostic paths.
Symptoms of a Failing 2008-2013 CTS Body Control Module
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your Body Control Module needs replacement:
- ✔ Power windows or door locks operating erratically or not at all.
- ✔ Interior or exterior lights (headlights, taillights, dome lights) staying on, flickering, or not turning on.
- ✔ The security system acting up, causing alarm issues or preventing the car from starting.
- ✔ Inaccurate or flashing warning lights on the instrument cluster (e.g., airbag, check engine).
- ✔ Key fob not working reliably for locking, unlocking, or remote start.
- ✔ Climate control system behaving unpredictably.
- ✔ Radio or infotainment system malfunctions.
Plug-and-Play Solution with VIN Programming
The biggest challenge with replacing a modern vehicle computer is the need for expensive, dealer-specific programming. We eliminate this step for you. When you purchase this module, simply provide us with your vehicle’s VIN. Our technicians will flash the unit with the correct software and calibration files for your specific 2008-2013 CTS. This ensures seamless integration with your car’s existing systems. There is no core charge, so you can keep your original module.
Important Post-Installation Information
While this module is programmed for your vehicle, certain systems may require a relearn or synchronization procedure after installation. These are standard procedures that a qualified technician can perform with a professional scan tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, the ‘Setup SDM Primary Key in BCM’ procedure must be performed. This syncs the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure proper function of the brake lights and traction control system.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
Broad GM Compatibility
This versatile Body Control Module is a direct replacement for a wide range of GM part numbers, ensuring a perfect fit and function not only for the Cadillac CTS but also for many other vehicles like the Equinox, Impala, Acadia, Tahoe, and more. It replaces 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, and 95151084.
Frequently Asked Questions
What does a Body Control Module do on a Cadillac CTS?
The BCM is a computer that manages and controls many of the non-engine related electronic functions in your CTS. This includes power windows, door locks, interior and exterior lighting, the security system, key fob functions, and even parts of the climate control system.
Is this BCM difficult to install?
The physical installation is typically straightforward for someone with moderate DIY automotive experience. On the 2008-2013 CTS, it is usually located on the left-hand (driver’s) side of the dash. However, some post-installation electronic procedures, like an airbag system sync, may require a professional scan tool.
Do I need to program this module?
No. The main benefit of our service is that we program the module for you before shipping. You just need to provide your vehicle’s 17-digit VIN during or after checkout. This saves you a trip to the dealership and additional programming fees.
What is the VIN and why do you need it?
The VIN (Vehicle Identification Number) is your car’s unique 17-digit serial number. We use it to access the specific software and calibration files from GM that match your car’s exact features and options, ensuring the BCM works perfectly upon installation.
What happens if my airbag light is on after installation?
This is a common occurrence when replacing a BCM. The new module needs to be electronically ‘introduced’ to the airbag system’s computer. A technician with a capable scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems and turn off the light.
Will this fix all my car’s electrical problems?
If your issues match the common symptoms of BCM failure, this module is very likely the solution. However, electrical problems can be complex. It’s always best to have a proper diagnosis performed to confirm the BCM is the root cause before ordering.