Restore Your Truck’s Electrical Brain and End Frustrating Glitches
If you’re dealing with bizarre electrical issues in your 2010 Chevrolet Avalanche 1500—like flickering lights, malfunctioning power windows, or random warning chimes—a failing Body Control Module (BCM) is often the culprit. As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable truck into a source of constant headaches. It’s the central command center for your vehicle’s body electronics, and when it fails, chaos ensues. This isn’t just an inconvenience; it can affect critical systems, including security and safety warnings.
We offer a straightforward, reliable solution. This Body Control Module, part number 15872421, is the definitive fix for your truck’s electrical woes. The best part? We handle the most complicated step for you. Simply provide your vehicle’s VIN during checkout, and we will program the module with the latest GM software specifically for your 2010 Avalanche 1500. It arrives at your door ready for installation, saving you a costly trip to the dealership and hours of diagnostic guesswork. Restore your truck’s functionality and peace of mind with a component you can trust.
A Technician’s Notebook
Just last month, a 2010 Avalanche 1500 was towed to my shop. The owner was at his wit’s end. The radio would turn on and off by itself, the door locks were cycling while driving, and sometimes the truck wouldn’t start at all, despite having a new battery. A scan showed a flurry of communication errors between modules. Instead of chasing each individual symptom, my experience pointed directly to the BCM. After confirming power and ground to the module were solid, we swapped it with a pre-programmed unit like this one. The change was immediate. All the strange electrical gremlins vanished, and the truck started reliably every time. It’s a classic case where replacing the central ‘brain’ solves a dozen smaller problems at once.
Is Your Avalanche Exhibiting These Symptoms?
- ✔ Intermittent or non-working power windows, door locks, or mirrors.
- ✔ Flickering interior or exterior lights, including headlights and dash lights.
- ✔ The security system acting erratically or preventing the engine from starting.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Warning lights (like the airbag light) staying on for no apparent reason.
- ✔ Radio or climate control systems functioning incorrectly.
Your Straightforward BCM Installation Guide
Replacing the 2010 Avalanche 1500 BCM is a manageable job for a confident DIYer. It’s typically located under the steering column on the driver’s side.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On the 2010 Avalanche, you’ll find the BCM mounted under the driver’s side of the dashboard, near the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect the Battery: Reattach the negative battery terminal.
- Critical Final Steps: After installation, two procedures are often required. Use a capable diagnostic scan tool to perform the ‘Setup SDM Primary Key in BCM’ to clear any airbag faults. Additionally, your vehicle may require a Brake Pedal Position Sensor recalibration to ensure proper brake light and stability control function.
Verified Vehicle Compatibility
While this is a direct-fit solution for the 2010 Avalanche 1500 BCM, this versatile module also fits a wide range of other GM vehicles. Always confirm your part number or provide your VIN to guarantee compatibility. This module is a direct replacement for part numbers: 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, and 95151084.
Frequently Asked Questions
Do I need to get this BCM programmed by a dealer?
No. We program the module to your vehicle’s VIN before shipping it. It arrives ready to be installed, saving you time and money.
What happens if I don’t provide my VIN?
We cannot ship the module without your VIN. The programming is essential for the BCM to communicate correctly with your vehicle’s other electronic systems.
Will this fix my power window and lock problems?
If the issues are caused by a faulty BCM, then yes. The BCM directly controls these functions, and replacing a failed unit is the correct repair for these common symptoms.
Is this a difficult part to replace for a DIYer?
For someone with basic mechanical skills, it’s a very manageable task. It’s typically located under the driver’s side dash and involves removing a few connectors and bolts. The most important part is the post-installation relearn procedures.
What are the required post-installation procedures?
After installation, you will need a diagnostic tool to perform the ‘Setup SDM Primary Key in BCM’ to sync with the airbag system and potentially a Brake Pedal Position Sensor relearn. This is critical for safety and proper function.