Restore Full Electrical Function to Your GM Truck
If you’re dealing with baffling electrical problems in your 2013 Silverado or other GM truck, the Body Control Module (BCM) is the most likely culprit. As the central command for your vehicle’s body electronics, a failing BCM can cause a cascade of frustrating issues. This OEM-quality replacement, interchangeable with part number 15263363, is the definitive solution. It arrives pre-programmed to your vehicle’s specific VIN, eliminating the need for expensive dealership visits and ensuring a true plug-and-play repair that gets you back on the road with confidence.
The BCM governs everything from your power windows and door locks to the HVAC system and security features. When it starts to fail, you might notice one system acting up, or several at once. This module restores stable, reliable communication between these critical components, putting an end to the guesswork and intermittent faults that are so common with a faulty original unit.
I recently had a 2013 GMC Sierra in the shop with a classic BCM failure story. The owner had spent hundreds chasing what he thought was a bad ground. His radio would cut out, the driver’s side window worked only when it wanted to, and the airbag light was on. After confirming his grounds were solid, we scanned the system and found multiple communication codes pointing to the BCM. Swapping in a VIN-programmed module like this one solved every single issue in under 10 minutes. It’s a reminder that what seems like multiple unrelated problems often points to one central failure.
Is Your Silverado Showing These Electrical Faults?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, it’s a strong indicator that your module needs replacement. Here are some of the most common signs I’ve seen in my 20+ years of diagnostics:
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ The HVAC blower motor works sporadically or not at all.
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ The security system acts erratically, sometimes preventing the vehicle from starting.
- ✔ Unexplained battery drain or other persistent electrical gremlins.
- ✔ Strange behavior from windshield wipers or exterior lighting.
Your 5-Minute BCM Installation Guide
Replacing the 2013 Silverado BCM is a straightforward job that most DIYers can handle with basic tools. The module is conveniently located and designed for easy access.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Locate the BCM: On most GM trucks and SUVs from this era, the BCM is located under the driver’s side dashboard, to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old module. They have locking tabs that need to be depressed. Once disconnected, the module can be unclipped or unbolted from its mounting bracket.
- Install the New Module: Seat the new, VIN-programmed BCM into the mounting bracket and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the negative battery terminal. Start the vehicle and test all functions controlled by the BCM—lights, locks, windows, wipers, and HVAC—to confirm the repair was successful.
Post-Installation Note: In some cases, particularly if the airbag light was on, a ‘Setup SDM Primary Key in BCM’ procedure may be needed using a professional scan tool to clear the light. Additionally, a Brake Pedal Position Relearn might be required on certain models. These are simple procedures for any qualified technician.
Guaranteed Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for a wide range of General Motors vehicles and is interchangeable with numerous part numbers, including 25844480, 25835966, 15263363, 15943678, 20939137, and 22860591. Please verify your vehicle from the list below.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the central computer for your vehicle’s body-related electronic systems. It controls non-engine functions like power windows, locks, lights, wipers, the security system, and the climate control (HVAC) system.
Will I need to program this 2013 Silverado BCM?
No. This module is sold with VIN programming service included. We flash it with your vehicle’s specific VIN and the latest GM software before shipping, so it’s ready for plug-and-play installation without a trip to the dealer.
What if my airbag light stays on after installation?
If the airbag light remains on, it means the new BCM needs to be synced with the airbag system’s SDM (Sensing and Diagnostic Module). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. It’s a quick procedure for any competent repair shop.
Is there a core charge for this part?
No, there is no core charge. You are not required to send your old, faulty module back to us, which saves you time and return shipping costs.
How do I know if this BCM is compatible with my truck?
This module, part number 15263363, fits a wide range of 2007-2013 GM trucks and SUVs. Please check the detailed fitment list on this page or match one of the many interchangeable part numbers listed to ensure compatibility with your vehicle.