Restore Full Electrical Function to Your GM Truck with a Pre-Programmed BCM
If you’re dealing with baffling electrical issues in your 2013 GMC Sierra 2500—like a dead climate control panel, flickering lights, or a persistent airbag warning—you’ve likely pinpointed the culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can create a host of frustrating and unpredictable problems. This direct-fit replacement, part number 15263497, arrives expertly programmed to your vehicle’s VIN, making it a true plug-and-play solution that gets you back on the road without a costly trip to the dealership.
A Technician’s Notebook: The Classic GM BCM Failure
Just last week, a 2013 Sierra 2500 was towed into my bay. The owner was at his wit’s end. The radio would turn on and off by itself, the power locks worked intermittently, and the HVAC was completely unresponsive. On top of that, the airbag light was on, showing a DTC B1001. After confirming the main battery and grounds were solid, all diagnostic paths led straight to the BCM. These modules are notorious for internal circuit board failures over time, causing exactly this kind of electrical chaos. We installed one of our VIN-programmed modules, performed the quick SDM key relearn, and had the truck’s electronics running perfectly in under 15 minutes. It’s a common repair, and having a pre-programmed module is the key to a fast, effective fix.
Is Your Sierra 2500 Showing These Electrical Gremlins?
A failing BCM doesn’t always cause a complete shutdown. Often, it starts with small, annoying glitches. Here are the most common symptoms I see in the shop:
- ✔ Unresponsive or erratic HVAC and blower motor controls.
- ✔ Power windows, door locks, or mirrors that work sporadically or not at all.
- ✔ An illuminated airbag warning light, often with a B1001 diagnostic trouble code.
- ✔ Interior or exterior lights that flicker, stay on, or won’t turn on.
- ✔ Vehicle security system malfunctions, causing no-start or stalling conditions.
- ✔ A cluster of seemingly unrelated electrical trouble codes stored in the system.
Your Straightforward BCM Installation Guide
Replacing the BCM is a job most DIYers can handle with basic tools. The key is the post-installation procedure, which is critical for safety systems. Follow these steps carefully.
- Safety First: Always disconnect the negative terminal from your truck’s battery before working on any electrical components.
- Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Swap the Module: Carefully unplug the wiring harness connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the old BCM and install the new one in its place. Reconnect all wiring harnesses securely.
- Reconnect Power: Reattach the negative battery terminal.
- CRITICAL – Airbag System Reset: Even with a programmed module, you MUST perform the ‘Setup SDM Primary Key in BCM’ procedure using a bi-directional scan tool. This step pairs the new BCM with the airbag system and clears the B1001 code. Your airbag system will not function correctly until this is done.
- Brake Pedal Check: Some vehicles require a Brake Pedal Position Sensor recalibration after BCM replacement. If your scanner has this function, it’s wise to perform it to ensure proper brake light and ABS operation.
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a direct replacement for a wide range of General Motors vehicles. While this listing is focused on the 2013 Sierra 2500 BCM, it also fits the following models. Please verify your part number or contact us with your VIN to confirm compatibility.
ESCALADE & ESV & EXT 07-11
SIERRA 1500 PICKUP 07-11 (07 New Style)
SIERRA 2500 & 3500 PICKUP 07-13 (07 New Style)
SIERRA DENALI 07-13 (07 New Style)
SILVERADO 1500 PICKUP 07-11 (07 New Style)
SILVERADO 2500 & 3500 PICKUP 07-13 (07 New Style)
SUBURBAN 1500 & 2500 07-11
TAHOE 07-11
YUKON & YUKON XL 1500/2500 07-11
Interchangeable Part Numbers: 25844480, 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, 22860591
Frequently Asked Questions
What does a Body Control Module do?
The BCM is the computer responsible for managing your vehicle’s non-engine related electronic systems. This includes power windows, locks, interior and exterior lighting, wipers, the security system, and the HVAC (heating and air conditioning) controls.
Why is VIN programming so important?
VIN programming loads your truck’s specific software and options into the module. This ensures all features work correctly right out of the box, just as they did from the factory. It eliminates the need for expensive programming at a dealership.
Can I install this myself if I’m not a professional mechanic?
Yes, the physical installation is very straightforward for most DIYers. However, you will need access to a bi-directional scan tool capable of performing the ‘Setup SDM Primary Key’ function to reset the airbag system. Many local shops can perform this service for a small fee if you don’t own one.
Will this part fix my airbag light?
If your airbag light is on due to a BCM-related code like B1001, then yes, this module will resolve the root cause. You must still perform the SDM key relearn procedure with a scan tool to clear the light and ensure the system is active.
Is there a core charge for this part?
No, there is no core charge. You can keep or dispose of your old module without the hassle of returning it.