Restore Full Electrical Function to Your Vehicle
Is your Cadillac STS or other GM vehicle plagued by mysterious electrical issues? Flickering lights, malfunctioning power windows, a dead battery overnight, or a security system that acts on its own are all classic signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can create a cascade of frustrating and difficult-to-diagnose problems. This direct-fit replacement Body Control Module, part number 15921352, is the definitive solution to restore your vehicle’s stability and functionality.
The Critical Role of Your 2010 STS Body Control Module
Think of the BCM as the brain for all non-engine related electronics. It interprets commands from switches (like your window controls or headlight switch) and manages power distribution to various accessories. It controls the interior and exterior lighting, power locks, security system, climate control blower, and even communicates with other modules throughout the vehicle. A breakdown in this critical component can make your car feel unreliable and unpredictable. Our replacement module ensures all these systems communicate and operate exactly as the manufacturer intended.
From the Diagnostic Bay
We once had a 2010 Cadillac CTS come in with a persistent battery drain that two other shops couldn’t solve. The owner was ready to sell the car. Every morning, the battery was dead. We tested everything—alternator, starter, and checked for parasitic draws. After hours of diagnostics, we traced the draw to the interior lighting circuit, which was staying powered on at a very low level even when the car was off. The culprit? A faulty BCM that wasn’t properly entering its ‘sleep’ mode. Replacing the BCM with a correctly programmed unit solved the problem instantly, saving the customer from buying a new car over a single faulty module.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ The security system or keyless entry failing to operate correctly.
- ✔ Unexplained battery drain that leaves you with a dead battery.
- ✔ Warning lights like “Service Electrical System” appearing on the dash.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Dashboard gauges behaving erratically.
Plug-and-Play Solution with VIN Programming
One of the biggest hurdles in replacing a modern vehicle computer is programming. A BCM from a dealership or a salvage yard won’t work correctly until it’s programmed to your vehicle’s specific Vehicle Identification Number (VIN) and options package. This process typically requires expensive dealer-specific scan tools and labor charges. We eliminate that hassle entirely. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this BCM with the latest GM software updates specific to your car. It will arrive at your door ready for installation, saving you time, money, and a trip to the dealership.
Post-Installation Procedures
While our programming handles the majority of the setup, some vehicles may require minor post-installation steps to ensure all systems are perfectly synchronized. These are often simple procedures that can be performed with a professional-grade diagnostic tool.
- Airbag System Sync: If the airbag warning light is illuminated after installation, a “Setup SDM Primary Key in BCM” procedure is necessary to sync the new BCM with the airbag system. This is only required if the light is on.
- Brake Pedal Position Relearn: In some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light operation and to satisfy the traction control system.
Please note: Specific procedures can vary by vehicle. Always consult a factory service manual or a qualified technician for guidance.
This module is a direct replacement for a wide range of original equipment part numbers, including: 10382479, 15093910, 15276271, 15819552, 15921352, 20815898, 22860591, 25892622, and many more. It fits a vast array of GM vehicles from Cadillac, Chevrolet, GMC, Buick, Saturn, and Hummer. Please verify your part number and check the fitment list to ensure compatibility.
Frequently Asked Questions
What does a Body Control Module do?
The BCM is a computer that manages and controls many of your vehicle’s electronic accessories and body functions, such as power windows, door locks, interior/exterior lighting, security system, and wipers. It acts as a central hub for these systems.
Why do I need to provide my VIN?
Providing your VIN is essential because we program the BCM specifically for your vehicle’s unique configuration and options. This ensures that all features work correctly upon installation, making the process as close to plug-and-play as possible and preventing a mandatory trip to the dealer.
Is this part difficult to install?
The physical installation is typically straightforward for someone with moderate mechanical skill. The BCM is usually located under the dashboard on the driver’s or passenger’s side. The main challenge is typically the programming, which we handle for you before shipment. Some post-install relearn procedures may be needed depending on your exact model.
Will I need to take my car to a dealer after installation?
In most cases, no. Our VIN programming service is designed to eliminate the need for dealer intervention. However, as noted, some vehicles may require a simple relearn procedure for systems like the airbag or brake pedal sensor, which can be done by any competent repair shop with a professional scan tool.
How do I know for sure that my BCM is the problem?
Diagnosing a BCM requires ruling out other potential causes like fuses, relays, wiring, and switches. If you are experiencing multiple, unrelated electrical issues from the symptom list, the BCM is a very likely culprit. A professional diagnosis with a high-end scan tool that can communicate with the BCM is the most definitive way to confirm failure.