Is Your GM Truck Plagued by Electrical Gremlins?
If you’re dealing with bizarre and frustrating electrical issues in your 2007-2013 GM truck or SUV, you’re not alone. Flickering lights, a dead climate control panel, power windows with a mind of their own, or a security light that won’t turn off are all classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s body electronics, and when it starts to fail, it can cause a cascade of seemingly unrelated problems. This VIN-programmed BCM, part number 15284816 (interchangeable with 25844480), is the definitive solution to restore order and full functionality to your vehicle.
Common Symptoms of a Failing BCM
- ✔ Unresponsive Accessories: Power windows, door locks, or mirrors that work intermittently or not at all.
- ✔ HVAC Malfunctions: Climate controls are dead, the blower motor is erratic, or the A/C won’t engage.
- ✔ Lighting Problems: Interior or exterior lights staying on, not turning on, or flickering unexpectedly.
- ✔ Security System Faults: The anti-theft system may prevent the truck from starting, or the alarm may go off randomly.
- ✔ Persistent Airbag Light: An airbag warning light, often accompanied by DTC B1001, that won’t clear.
- ✔ False Dashboard Warnings: Incorrect warning messages or gauges behaving erratically.
- ✔ Communication Errors: A professional scan tool shows multiple U-codes, indicating a loss of communication between modules.
The Direct-Fit Solution: A Pre-Programmed 2013 Sierra BCM
Don’t waste time and money at the dealership. This Body Control Module is the smart, efficient solution for your repair. We take all the guesswork and complexity out of the process. When you order, we use your vehicle’s VIN to program the module with the latest GM-certified software. This ensures that it is a 100% plug-and-play part, ready for installation the moment it arrives. There are no additional programming fees or special tools required for the basic installation.
This module is built to meet or exceed original equipment standards, providing a reliable and long-lasting repair. It directly replaces a wide range of original part numbers, including 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, and many more, making it the correct choice for your 2013 Sierra BCM replacement and other compatible GM models.
Installation and Post-Install Procedures
Replacing the BCM is a straightforward job for any DIYer. The module is typically located under the driver’s side dashboard, near the steering column. The physical swap involves disconnecting a few electrical connectors and removing the old module. However, depending on your vehicle’s specific state, a couple of simple electronic relearn procedures may be necessary after installation.
- Airbag System Sync: If your airbag warning light was on before the swap or comes on after, a ‘Setup SDM Primary Key in BCM’ procedure is required. This is not a fault of the part, but a necessary security handshake between the BCM and the airbag module. This procedure must be performed with a professional-grade scan tool.
- Brake Pedal Position Relearn: Some vehicles may require a brake pedal position sensor recalibration to ensure proper brake light and traction control operation. This is also performed with a scan tool.
We believe in transparent and hassle-free service. That’s why this module comes with a one-year warranty and requires no core charge. You can keep your old part without any extra fees or return shipping to worry about.
Frequently Asked Questions
What does a Body Control Module do on a 2013 GMC Sierra?
The BCM acts as the central computer for your truck’s body electronics. It controls non-engine related functions like power windows, door locks, interior/exterior lights, the security system, wipers, and the HVAC system.
Is this BCM truly plug-and-play?
Yes, it is delivered pre-programmed to your vehicle’s VIN for a direct installation. In most cases, it works immediately. However, for safety systems like airbags, a ‘relearn’ or ‘sync’ procedure with a pro-level scan tool may be required to clear warning lights.
Where is the BCM located on my truck?
The BCM is located under the driver’s side dashboard, typically to the left of the steering column. It’s a black plastic box with several large electrical connectors.
Do I need to send my old BCM back?
No. This part has no core charge, so you are not required to return your original module.
Will this fix my airbag light with code B1001?
A faulty BCM is a common cause of the B1001 code. Replacing it with this programmed module often resolves the root issue. However, you will still need to perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool to sync the modules and turn off the light.
How do I know for sure that my BCM is bad?
While a professional diagnosis is best, a strong indicator of BCM failure is having multiple, unrelated electrical problems occurring at the same time, as listed in the symptoms section above.