Fix Your Truck’s Electrical Headaches for Good
If you’re dealing with baffling electrical issues in your 2011 GMC Sierra Denali 3500, the Body Control Module (BCM) is the most likely culprit. As the central command for your truck’s body electronics, a failing BCM can cause a cascade of frustrating problems. This replacement module, part number 15263497, is the definitive solution. We don’t just sell you a part; we provide a complete repair solution through our expert Cloning Service. We transfer the unique data from your original module to this new one, ensuring a true plug-and-play experience without any need for expensive dealership programming.
A Technician’s Notebook: The BCM That Mimicked a Bad Ground
I once had a 2011 Silverado 2500 in my bay that was driving the owner crazy. The radio would cut out, the dome light would flicker, and the power locks worked only when they felt like it. He had already replaced the battery and checked all the main grounding points under the hood and on the frame. After hours of diagnostics, we traced the voltage irregularities back to the BCM. The module itself was failing internally, causing intermittent power drops across multiple circuits. A cloned replacement BCM fixed every single issue in under 10 minutes. It’s a classic case I’ve seen dozens of times on these GM trucks—what looks like a complex wiring problem is often a straightforward module failure.
Is Your Sierra Showing These Symptoms?
A faulty BCM can manifest in numerous ways. If your truck is experiencing any of the following, this module is the solution you need:
- ✔ Erratic or non-functional power windows, door locks, or interior/exterior lights.
- ✔ The security system acting up, causing no-start conditions or random alarm triggers.
- ✔ HVAC controls that don’t respond or a blower motor that works intermittently.
- ✔ An airbag warning light on the dash, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Unexplained battery drain or other bizarre electrical behavior.
A Straightforward Guide to BCM Installation
For most DIYers and professional mechanics, this is a quick and simple job. You’ll have your truck’s electronics back to normal in minutes.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on electrical components.
- Locate the BCM: On most GM trucks and SUVs of this era, the BCM is located under the driver’s side of the dashboard, near the steering column.
- Swap the Module: Carefully unplug the electrical connectors from your old BCM. The connectors are color-coded and keyed, so they only fit one way. Remove the old module and install the new one in its place.
- Reconnect and Test: Re-attach the electrical connectors to the new BCM, ensuring they click securely into place. Reconnect the battery terminal.
- Perform Final Checks: Start the vehicle and test all body functions (lights, locks, windows, etc.). If an airbag light appears, a simple relearn procedure may be needed (see FAQ).
Will This Fit My Truck?
This BCM is a direct replacement for a wide range of General Motors vehicles from 2007-2013 and interchanges with numerous part numbers, including 25844480, 25835966, 15263363, 15878753, and more. It is confirmed to fit the following models:
Frequently Asked Questions
How does the Cloning Service work?
After you place your order, we will provide instructions for you to send us your original BCM. Our technicians will then perform a direct data transfer, copying all the vehicle-specific settings, key information, and software to the replacement module. This makes the installation seamless, with no additional programming required.
Do I get my old module back?
Yes. Your original module is always returned to you along with the fully programmed replacement unit. We do not keep cores, and there is no core charge.
What do I do if the airbag light is on after installation?
In some cases, the new BCM needs to be synced with the airbag system’s Supplemental Deployment Module (SDM). This is a simple procedure called ‘Setup SDM Primary Key in BCM’ that can be performed with a professional-grade scan tool. It is only necessary if the airbag warning light comes on after the swap.
Will I need to perform any other procedures?
Occasionally, a Brake Pedal Position (BPP) sensor relearn may be needed to ensure proper brake light and stability control function. Like the airbag sync, this is a simple procedure done with a scan tool. Always consult a service manual for your specific vehicle for detailed guidance.
Is this part covered by a warranty?
Absolutely. This module is backed by our one-year warranty, giving you peace of mind and confidence in your repair.