If you’re dealing with baffling electrical issues in your 2012-2013 Chevy Avalanche or another compatible GM truck, you’ve come to the right place. As a technician with over two decades of experience under the hood, I’ve seen firsthand how a failing Body Control Module (BCM) can turn a reliable truck into a source of daily frustration. It’s the hidden culprit behind flickering lights, unresponsive power windows, and mysterious warning messages on your dash. This isn’t just an inconvenience; it can affect your vehicle’s security and safety systems.
We offer a straightforward and reliable solution: a genuine GM Body Control Module, part number 22846365, that arrives at your doorstep fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). Forget about expensive dealership appointments and towing fees. Simply provide us with your VIN during checkout, and our experts will flash the module with the latest GM software updates. This ensures seamless integration and restores the precise functionality your truck had when it left the factory.
A Technician’s Notebook
I remember a 2013 Silverado 2500 that came into the bay with a laundry list of complaints. The radio would turn on and off by itself, the dome lights wouldn’t work, and the remote key fob was useless. The owner had already replaced the battery and checked all the fuses. After connecting my diagnostic scanner, I pulled a U0140 code—Lost Communication With Body Control Module. Instead of a complex wiring repair, the issue was a classic internal BCM failure. We installed one of our pre-programmed modules, and in under an hour, every single issue was resolved. The customer saved hundreds compared to the dealership quote and drove away with a truck that behaved like new.
Is Your Truck Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re noticing any of the following, this module is likely the solution you need:
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or won’t turn on at all.
- ✔ The security system acting up or preventing the engine from starting.
- ✔ Non-functional radio or infotainment system controls.
- ✔ Dashboard warning lights such as ‘Service StabiliTrak’ or ‘Service 4WD’.
- ✔ Diagnostic Trouble Codes (DTCs) like U0140, U0155, or other ‘U’ (network) codes.
- ✔ Remote keyless entry (fob) not working correctly.
Your Straightforward BCM Installation Guide
Installing your new 2012-2013 Avalanche BCM is a manageable job for a confident DIYer. The module is typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- Locate the BCM: On most of these GM trucks and SUVs, you’ll find the BCM mounted 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 harness connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Reconnect all wiring harnesses, ensuring each plug clicks securely into place.
- Reconnect Power: Reattach the negative battery terminal.
- Perform Final Checks: Start the vehicle and test all body functions—windows, locks, lights, radio, etc. Note the post-installation procedures below, as some relearns may be necessary.
Post-Installation Requirements
Because this module is central to many systems, a couple of simple relearn procedures may be needed after installation. This is a normal part of the process.
- No Core Charge: You are not required to return your old module. Keep it!
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system. This is only necessary if the light is on.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor recalibration might be necessary. This can often be done with a capable bidirectional scan tool.
Disclaimer: Vehicle systems can vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step.
Guaranteed Fitment for Your GM Truck or SUV
This BCM is a direct replacement for part numbers 22846365, 22737275, and 22846364. It is guaranteed to fit the following models:
- Chevrolet Avalanche 1500: 2012-2013
- Chevrolet Silverado 1500/2500/3500: 2012-2014
- Chevrolet Suburban 1500/2500: 2012-2014
- Chevrolet Tahoe: 2012-2014
- GMC Sierra 1500/2500/3500 (incl. Denali): 2012-2014
- GMC Yukon & Yukon XL 1500/2500 (incl. Denali): 2012-2014
- Cadillac Escalade, ESV, EXT: 2012-2014
If you’re unsure about fitment, please send us a message with your VIN, and we’ll be happy to verify compatibility for you.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer in your vehicle that controls and monitors most of the non-engine-related electronic functions. This includes power windows, door locks, interior/exterior lighting, the security system, and even the radio.
Why do I need to provide my VIN?
Your VIN allows us to program the BCM with the specific software and settings for your truck’s exact features and options. This makes the installation process much simpler and ensures everything works correctly right out of the box.
Is this part difficult to install myself?
For someone with basic mechanical skills, the physical replacement is straightforward. The BCM is usually located under the dash and held in by a few bolts or clips. Our pre-programming service eliminates the most difficult part: the software configuration.
Will this fix my “Service StabiliTrak” warning?
In many cases, yes. The BCM communicates with the StabiliTrak system, and a faulty module can trigger this warning light. While other issues can cause this message, a failing BCM is a very common reason on these GM trucks.
What if the airbag light comes on after I install it?
This is an infrequent but possible occurrence. It means the new BCM needs to be electronically introduced to the airbag system’s computer (SDM). A repair shop with a professional-grade scan tool can perform the “Setup SDM Primary Key” procedure in a few minutes to resolve this.