Restore Your Truck’s Electrical System with a Plug-and-Play BCM
If you’re dealing with bizarre electrical issues in your 2012-2013 Chevy Avalanche or other GM truck, you know how frustrating it can be. Flickering dash lights, power windows with a mind of their own, or a security system that prevents your truck from starting—these are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s electronics, a faulty BCM can wreak havoc. This isn’t just an annoyance; it’s a reliability issue. In my 20+ years as a technician, I’ve seen how a bad BCM can mimic a dozen other problems, leading to wasted time and money on incorrect diagnoses.
This is your direct-fit, permanent solution. We solve the biggest hurdle of BCM replacement by programming this module specifically to your vehicle’s VIN before it ships. No expensive trips to the dealership for programming, no special dealer-only tools required. You get a BCM loaded with the latest GM software updates, ensuring optimal performance and compatibility right out of the box. This is the most efficient way to get your truck back to 100% functionality.
From the Service Bay: The Case of the Ghostly Gremlins
From the Service Bay: The Case of the Ghostly Gremlins
A customer brought in his 2013 Silverado 2500 with a list of complaints that sounded like a haunting: the radio would turn on by itself, the dome lights would flicker while driving, and occasionally, it just wouldn’t start. He’d already replaced the battery and checked the alternator. After hooking up the scan tool, I saw multiple ‘U’ codes, indicating communication loss with various modules. This pointed directly to the network’s traffic cop: the BCM. Instead of a costly dealer repair, we installed one of these VIN-programmed modules. The installation was straightforward, and upon startup, every single electrical gremlin was gone. He drove away with a reliable truck and saved hundreds on dealer programming fees.
Is Your Avalanche Showing These BCM Failure Signs?
A failing BCM can cause a wide range of confusing symptoms. If you’re experiencing any of the following, this module is likely the solution you need. Common diagnostic trouble codes (DTCs) associated with BCM failure include U0140, U0155, and various ‘B’ body codes.
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not working.
- ✔ The security system light is flashing, and the vehicle won’t start (anti-theft issue).
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ Dash warning lights (like ABS, Airbag, or Stabilitrak) appearing for no reason.
- ✔ A parasitic battery drain that kills your battery overnight.
- ✔ Inconsistent communication with a professional scan tool.
Your Straightforward BCM Installation Guide
Replacing the BCM is a manageable job for a confident DIYer. This module is typically located under the driver’s side of the dashboard, near the steering column. Follow these general steps for a successful installation.
- Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down completely.
- Locate the BCM: Remove the lower dash panel beneath the steering wheel to gain access. The BCM is a black plastic box with several large multi-pin electrical connectors.
- Disconnect and Remove: Carefully unplug all electrical connectors. They have locking tabs that must be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket and remove it.
- Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, ensuring each one clicks into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting the engine) and test all body functions: lights, locks, windows, radio, etc.
- Perform Relearns (If Needed): Start the vehicle. If the airbag light is on or you have brake system warnings, a post-install relearn procedure may be necessary (see FAQ section).
Verified Fitment for Your GM Truck or SUV
This Body Control Module is a guaranteed fit for a wide range of General Motors vehicles. It is a direct replacement for part numbers 22737275, 22846365, and 22846364. Please provide your VIN upon purchase to ensure perfect programming for your specific model and options.
Compatible models include, but are not limited to:
- 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 (including Denali): 2012-2014
- GMC Yukon & Yukon XL (including Denali): 2012-2014
- Cadillac Escalade, ESV, EXT: 2012-2014
Frequently Asked Questions
- Why do you need my VIN to sell me this 2012-2013 Avalanche BCM?
- Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your truck’s specific options require. This ensures all features work correctly and makes the installation a true plug-and-play experience, saving you a trip to the dealer.
- What does a Body Control Module (BCM) actually do?
- The BCM is the main computer responsible for managing your vehicle’s non-engine-related electronics. This includes power windows, locks, lights, the security system, wipers, and many other comfort and convenience features.
- Is this part difficult to install myself?
- For most DIYers with basic tools, this is a very manageable repair. The module is located under the dash and involves unplugging the old unit and plugging in the new one. The most important part—the programming—is already done for you.
- What if my airbag light comes on after installation?
- This is a possibility. If it happens, the BCM needs to be synced with the airbag system (SDM). This is a simple ‘Setup SDM Primary Key in BCM’ procedure that can be performed by any shop with a professional-grade diagnostic tool.
- Are there any other procedures I might need to do?
- Some models may require a Brake Pedal Position Sensor relearn. This is also a simple procedure done with a scan tool and ensures your brake lights and traction control system function properly. Always consult a service manual for vehicle-specific details.
- Do I need to send my old BCM back?
- No. There is no core charge for this part. You can keep your original module.