Tired of Chasing Electrical Gremlins in Your GM Truck?
If your 2007-2013 GM truck or SUV is acting possessed—with flickering lights, a dead HVAC system, or random warning messages—the culprit is often a failing Body Control Module (BCM). As the nerve center for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating, seemingly unrelated issues. This VIN-programmed BCM, part number 25844480, is the direct, reliable solution for restoring full functionality to your vehicle without a costly trip to the dealership. We program it to your vehicle’s specific VIN, so it arrives ready for a true plug-and-play installation.
Case Study: A Tricky Diagnosis
I recently had a 2011 Silverado 2500 in my bay that was driving the owner crazy. The radio would cut out, the driver’s side power window worked intermittently, and the airbag light was on with a DTC B1001. The owner had already replaced the battery and checked fuses with no luck. The symptoms pointed everywhere and nowhere. After confirming the main power and ground connections to the BCM were solid (always the first step!), we swapped in one of these VIN-programmed modules. In less than 10 minutes, every single issue was resolved. The key was the pre-programming, which correctly synced all the vehicle’s systems on the first try, including the SDM handshake that cleared the airbag code after a quick relearn. It’s a textbook example of how a failing BCM can mimic a dozen other problems.
Is Your Truck Showing These BCM Failure Signs?
- ✔ Your HVAC controls are unresponsive, or the blower motor works only on high or not at all.
- ✔ The airbag warning light is illuminated, often with a persistent DTC B1001 code that won’t clear.
- ✔ You’re experiencing bizarre electrical issues: power windows or locks fail, interior lights flicker, or the horn honks randomly.
- ✔ The anti-theft or security system is malfunctioning, causing no-start conditions or stalling.
- ✔ Your wipers operate erratically or won’t turn off.
- ✔ Communication errors (U-codes) are present when scanning the vehicle’s modules.
A Straightforward Guide to Installation
Replacing your 2013 Sierra BCM is a simple job that most DIYers can complete in their driveway. No complex wiring is required.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning work.
- Locate the BCM: On most GM trucks and SUVs, 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 multiple wiring harnesses connected to the old BCM. The connectors have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the module from its mounting bracket.
- Install the New Module: Seat the new, VIN-programmed BCM into the mounting bracket and securely plug in all the wiring harnesses. You’ll hear a click as they lock into place.
- Post-Installation Checks: Reconnect the battery. Start the vehicle and test all functions: lights, wipers, locks, windows, and HVAC. In most cases, the repair is complete. If the airbag light remains on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ function. Some models may also require a ‘Brake Pedal Position Relearn’.
Verified Vehicle Compatibility
This module is a direct-fit replacement for a wide range of General Motors vehicles and is interchangeable with part numbers 15263497, 25835966, 15263363, 15878753, and many more. It fits models including:
- Chevrolet Avalanche (2007-2011)
- Chevrolet Silverado 1500/2500/3500 (2007-2013)
- Chevrolet Suburban 1500/2500 (2007-2011)
- Chevrolet Tahoe (2007-2011)
- GMC Sierra 1500/2500/3500 (2007-2013)
- GMC Sierra Denali (2007-2013)
- GMC Yukon & Yukon XL (2007-2011)
- Cadillac Escalade, ESV, EXT (2007-2011)
Note: For 2007 models, this fits the ‘new style’ with the smooth door skin. Please verify your part number to ensure compatibility.
Frequently Asked Questions
Frequently Asked Questions
2013 Sierra BCM
How can I be sure this is the right part for my truck?
The best way is to match the part number from your original BCM to our list of compatible numbers. This listing, which includes the and many others, covers a wide range of GM trucks. If you’re unsure, contact us with your VIN.