Restore Full Electrical Function to Your Vehicle
Is your Cadillac CTS or other GM vehicle plagued by strange and frustrating electrical problems? Flickering lights, malfunctioning power windows, unresponsive door locks, or a security system that acts on its own are common signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it fails, it can create a cascade of issues that are difficult to diagnose. This replacement Body Control Module, part number 15299986, is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
Unlike a standard replacement part from a dealer or salvage yard, this BCM comes with a crucial service: it is professionally programmed to your vehicle’s specific Vehicle Identification Number (VIN) before it ships. This means it arrives ready for a much simpler installation, loaded with the latest software updates from GM. This eliminates the need for expensive programming tools or a costly trip to the dealership, saving you both time and money.
From the Diagnostic Bay
We had a 2011 Cadillac CTS in the shop that was driving its owner crazy. The radio would randomly turn off, the driver’s side window wouldn’t go down, and the anti-theft light would flash intermittently. The owner had already replaced the battery and checked all the fuses. After connecting our diagnostic scanner, we saw multiple communication error codes pointing toward the BCM. Instead of a simple failure, the module was sending corrupt data across the vehicle’s network, causing chaos. Installing a VIN-programmed 2008-2013 CTS BCM resolved every single issue instantly. It’s a perfect example of how one failing module can mimic a dozen different problems.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The vehicle’s security system or keyless entry failing to operate correctly.
- ✔ Dashboard warning lights illuminating for no apparent reason.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Issues with climate control fan speeds or function.
- ✔ Rapid battery drain while the vehicle is parked.
The VIN-Programmed Advantage
The key to a successful repair is ensuring the replacement module communicates perfectly with all other computers in your vehicle. Our process is simple and effective. After you place your order, simply provide us with your vehicle’s VIN. Our technicians will then flash the module with the correct software and vehicle-specific parameters. This makes the 2008-2013 CTS BCM a true plug-and-play component, tailored specifically for your car’s options and features.
Installation and Post-Install Procedures
While the physical installation of the BCM is straightforward for a skilled DIYer or any professional technician, some electronic procedures may be necessary after the part is connected. These steps ensure all related vehicle systems are properly synchronized with the new module.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure is required. This must be done with a professional-grade diagnostic tool to sync the new BCM with the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure the brake lights and traction control system function as designed.
Please note: Specific requirements can vary by vehicle. We always recommend consulting a factory service manual or a qualified technician for detailed instructions.
This module is a direct replacement for a wide range of part numbers and fits an extensive list of GM vehicles, including models from Chevrolet, GMC, Buick, Saturn, and Hummer. Please verify your part number or consult the fitment list to ensure compatibility.
Frequently Asked Questions
Why do you need my VIN to program the BCM?
Your vehicle’s VIN allows us to load the exact software and configuration files required for its specific features, such as the type of transmission, keyless entry system, lighting options, and more. This ensures the 2008-2013 CTS BCM works perfectly out of the box without requiring additional dealer programming.
Is this a difficult part to install myself?
The physical replacement is typically manageable for someone with moderate mechanical skill, as it usually involves removing a few dash panels to access the module. However, post-installation procedures like the airbag sync may require a high-end diagnostic scan tool that most DIY mechanics do not own. We recommend professional installation if you are not comfortable with these steps.
What happens if the post-installation procedures are not performed?
If required for your vehicle, failing to perform these procedures can result in persistent warning lights (like the airbag light) or improperly functioning systems (like brake lights or traction control). It is essential to ensure all systems are correctly synced for safety and proper operation.
Will this BCM fix my car’s battery drain issue?
A faulty BCM is a very common cause of parasitic battery drain. The module can fail to go into ‘sleep’ mode when the car is off, continuously drawing power and draining the battery overnight. If your diagnostic process points to the BCM, this replacement part is the correct solution.
Is there a core charge for my old part?
No, there is no core charge for this module. You can keep your original part without needing to send it back to us.