Restore Your Truck’s Electrical System with a Plug-and-Play BCM
Are you tired of chasing electrical gremlins in your 2010 Chevy Avalanche 1500? Intermittent power windows, a flickering security light, or a frustrating no-start condition can all point to a single culprit: a failing Body Control Module (BCM). As the central hub for your truck’s comfort and security features, when the BCM goes bad, it can cause a cascade of confusing issues. This isn’t just an inconvenience; it can affect your vehicle’s security and daily usability. We offer a reliable, straightforward solution to get your truck back to 100%.
This is a direct-fit replacement Body Control Module, delivered to your door pre-programmed with the latest official GM software. Simply provide your vehicle’s VIN at checkout, and our experts will flash the module specifically for your 2010 Avalanche 1500. This critical step ensures all your truck’s original options and features work correctly right out of the box, saving you from a costly trip to the dealership for programming.
From the Diagnostic Bay: The BCM That Mimicked a Bad Fuel Pump
I once had a 2010 Tahoe (which uses a nearly identical electrical system to the Avalanche) come into my shop on a tow truck. The owner was convinced his fuel pump was dead—the truck would crank but never start. He’d already replaced the pump himself, but the problem persisted. A quick scan showed no fuel pump codes, but I did find a U0140 code: ‘Lost Communication With Body Control Module.’ The failing BCM wasn’t properly activating the fuel pump relay. Instead of a complex fuel system repair, the fix was a properly programmed 2010 Avalanche 1500 BCM. It’s a classic example of how a BCM failure can send you down the wrong diagnostic path.
Is Your Avalanche Showing These Symptoms?
- ✔ Power windows, door locks, or interior lights operating erratically or not at all.
- ✔ The security or anti-theft light stays on, preventing the engine from starting.
- ✔ Horn, wipers, or radio functions are inconsistent.
- ✔ False warnings on the instrument cluster, like ‘Service 4WD’ or ‘Service StabiliTrak’.
- ✔ Diagnostic trouble codes (DTCs) such as U0140, B1001, or other ‘U’ (network) codes are present.
- ✔ Complete loss of power to multiple accessories at once.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery and wait 10 minutes for the systems to fully discharge.
- ✔ Locate the BCM: On the 2010 Avalanche 1500, the BCM is typically located under the driver’s side of the dashboard, near the steering column.
- ✔ Disconnect and Remove: Carefully unplug the multiple wiring harness connectors. They have locking tabs that must be depressed. Once disconnected, unbolt the module from its mounting bracket.
- ✔ Install the New Module: Mount the new, pre-programmed BCM in the same location and securely reconnect all wiring harnesses. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and test all body functions—windows, locks, radio, lights, etc.
Important Post-Installation Information
While this module is pre-programmed for your VIN, some vehicle systems may require a ‘handshake’ procedure after installation. This is normal. Specifically, be aware of:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified technician if you are unsure about any step. No core charge is required; you can keep your old part.
Will This Fit My Vehicle?
This BCM is a direct replacement for part number 15880684 and is compatible with a wide range of GM vehicles. It fits the 2010 Avalanche 1500 and interchanges with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084. It also fits many other GM models including the Tahoe, Suburban, Yukon, Escalade, Silverado, Sierra, and various cars and vans. Please verify your part number or consult the detailed fitment list.
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM is a computer that acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, security system, interior/exterior lighting, wipers, and more.
Why do you need my VIN number?
Your Vehicle Identification Number (VIN) allows us to program the BCM with the exact software and settings your truck had when it left the factory. This ensures all your specific features work correctly without needing a dealer to program it.
Is this part difficult to install for a DIYer?
For someone with basic mechanical skills, the physical replacement is straightforward. It involves removing a few dash panels and unplugging connectors. The main benefit here is that the complex programming is already done for you.
What if my airbag light is on after I install it?
This is a possibility and is a security feature of the vehicle. The new BCM needs to be electronically introduced to the airbag’s computer (SDM). A repair shop with a high-level scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
Will this fix my ‘Service StabiliTrak’ message?
A failing BCM can sometimes cause this message by sending bad data to other modules. While it can be the cause, other issues like a faulty wheel speed sensor can also trigger it. A proper diagnosis is always recommended, but if you have other BCM-related symptoms, this is a likely solution.