End the Electrical Headaches in Your 2010 Avalanche
Are you dealing with baffling electrical issues in your truck? Power windows with a mind of their own, dashboard lights flickering like a holiday display, or a security system that prevents your truck from starting? As a technician with over 20 years of experience, I’ve seen these exact problems hundreds of times. The culprit is almost always a failing Body Control Module (BCM). This isn’t just an inconvenience; it’s a critical failure that can leave you stranded. The BCM is the central nervous system for your vehicle’s body electronics, managing everything from your interior lights and power locks to the anti-theft system. When it fails, chaos ensues.
This isn’t a salvaged part from a junkyard with an unknown history. This is a reliable replacement BCM that solves the problem correctly. We offer a professional cloning service that makes this repair straightforward. You send us your original BCM, and we transfer all the essential vehicle-specific data—including key information and security protocols—to this replacement unit. We also flash it with the latest GM software updates using your VIN. This means no expensive trip to the dealership for programming. The result is a true plug-and-play solution, designed to get your 2010 Avalanche Body Control Module functioning perfectly again.
Case Study: The Phantom No-Start
A customer brought in a 2010 Avalanche that would randomly refuse to start. The battery was new, the starter was fine, but the security light on the dash would flash, and the engine wouldn’t crank. He had already replaced several parts chasing the issue. After connecting my scan tool, I noticed multiple communication loss codes (U-codes) pointing to the BCM. The module wasn’t properly communicating with the powertrain or the key transponder. By performing a BCM data transfer to a quality replacement, we restored that critical communication link. The truck started reliably every time afterward. This highlights how a failing 2010 Avalanche Body Control Module can mimic other, more expensive problems.
Is Your Avalanche Exhibiting These BCM Failure Signs?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights staying on or not working at all.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ Horn alarming unexpectedly or not working when pressed.
- ✔ False warnings appearing on the driver information center (e.g., ‘Service 4WD’).
- ✔ Communication loss DTCs, such as U0140, U0155, or other U-codes.
Your Straightforward BCM Swap Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On the 2010 Avalanche, the BCM is typically located under the driver’s side of the dashboard, near the steering column.
- ✔ Remove the Module: Carefully disconnect the electrical connectors. They have locking tabs that need to be depressed. Then, unbolt the module from its mounting bracket.
- ✔ Install the New BCM: Mount the replacement module and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- ✔ Verify Operation: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc.—to confirm the repair was successful.
Post-Installation Checks & Procedures
Our cloning service makes this repair as simple as possible. However, due to the complexity of modern vehicle systems, some vehicles may require a ‘relearn’ or ‘sync’ procedure after installation. These are simple for any professional shop with a capable scan tool.
- Airbag System Sync: If your airbag warning light is on after the swap, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems. This is only necessary if the light appears.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be required to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a certified technician if you are unsure about any step of the process.
Verified Compatibility for Your GM Vehicle
This BCM, part number 15921352, is a direct replacement for a wide range of GM trucks, vans, and SUVs. It is compatible with numerous original part numbers, ensuring broad fitment. Please verify your vehicle is on the list below. If your part number is one of the following, this module will work: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
Fits models like: Acadia, Avalanche, Caprice, Captiva Sport, CTS, DTS, Enclave, Equinox, Escalade, Express/Savana Vans, G8, Hummer H2, Impala, Lucerne, Monte Carlo, Outlook, SRX, STS, Suburban, Tahoe, Torrent, Traverse, Vue, Yukon, and more across various years. Please check the specific options in the fitment data.
Frequently Asked Questions
How does the cloning service work?
After you place your order, you’ll ship your original BCM to us. We use specialized equipment to extract the unique data from your module and transfer it to the replacement unit. This ensures all your vehicle’s specific settings and security information are retained, making the installation plug-and-play.
Do I need to send my VIN?
Yes. Along with cloning your original module, we use your VIN to verify and apply the latest GM-certified software updates for your specific vehicle, ensuring optimal performance and reliability.
Why is this better than going to the dealer?
Our service saves you significant money and hassle. You avoid costly dealership programming fees and the need to have your vehicle towed. You receive a module that’s ready to install right out of the box.
What happens to my old BCM?
Your original module is always returned to you along with the programmed replacement unit. We do not keep your old part.
What tools are needed for the installation?
Basic hand tools, such as a socket set and a trim removal tool, are typically all that’s required to access and replace the BCM. No special electronic tools are needed for the installation itself.