Restore Full Electronic Control to Your Cadillac CTS
Is your 2008-2013 Cadillac CTS experiencing bizarre electrical issues? Flickering lights, malfunctioning power windows, or a security system that has a mind of its own are common indicators of a failing Body Control Module (BCM). The BCM acts as the central nervous system for your vehicle’s body electronics, and when it fails, it can cause a cascade of frustrating and seemingly unrelated problems. This replacement Body Control Module, part number 25847588, is the definitive solution to restore your vehicle’s functionality and your peace of mind.
Unlike other solutions that require an expensive trip to the dealership for programming, this module arrives at your door ready for installation. We take your vehicle’s VIN at the time of purchase and flash the BCM with the latest, most stable software updates directly from GM. This ensures perfect communication with your vehicle’s existing systems, saving you hundreds of dollars in labor and programming fees.
We had a 2011 CTS in the shop that was a real head-scratcher. The customer reported that the radio would randomly turn off, the driver’s side window would only work intermittently, and the interior dome light would stay on for minutes after locking the car. We checked fuses, relays, and even the window motor itself with no luck. Everything pointed to separate issues, but experience told us to look for a common link. We scanned the network and found multiple communication errors pointing back to the BCM. After installing a pre-programmed module just like this one, every single issue vanished instantly. It’s a powerful reminder of how central the BCM is to modern vehicle comfort and convenience.
Common Symptoms of a Failing 2008-2013 CTS Body Control Module
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ The vehicle’s security system or keyless entry malfunctioning.
- ✔ Unresponsive HVAC controls or blower motor issues.
- ✔ False warnings on the dashboard instrument cluster.
- ✔ Radio or infotainment system randomly shutting off or behaving strangely.
- ✔ Battery drain while the vehicle is parked.
Installation and Post-Install Considerations
Replacing the BCM is a straightforward process for a seasoned DIYer or any professional technician. On the 2008-2013 CTS, the BCM is typically located on the left-hand (driver’s) side of the dash. Because we program the module to your VIN before shipping, the most complex part of the job is already done. However, depending on your vehicle’s specific systems, a couple of simple relearn procedures may be necessary after installation.
- Airbag System Sync: In some cases, the new BCM may need to be synced with the airbag’s Supplemental Deployment Module (SDM). If your airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade scan tool.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor recalibration might be required. This is also performed with a capable diagnostic tool.
This module is a direct replacement for a wide range of part numbers, including 15872388, 20815898, 20935349, 22860591, and many more, ensuring broad compatibility across the GM family. Restore your vehicle’s electronic systems to factory-perfect condition today.
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. The main benefit of our service is that we program the module for you before it ships. Simply provide your vehicle’s VIN during checkout, and it will arrive ready to install, saving you time and money.
Where is the BCM located on my 2008-2013 Cadillac CTS?
The Body Control Module on this generation of CTS is typically found behind the dashboard on the driver’s side (LH dash).
What happens if I forget to provide my VIN?
We cannot ship the module without your VIN, as the programming is essential for it to function in your vehicle. Our customer service team will contact you to retrieve the VIN, which may delay your order.
Is this a guaranteed fix for my electrical problems?
This BCM will fix any issues directly caused by a faulty Body Control Module. While the symptoms listed are very common for BCM failure, we always recommend a proper diagnosis by a qualified technician to confirm the BCM is the root cause before ordering.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.