Restore Your Truck’s Electrical System with a Reliable, Programmed BCM
Are you dealing with baffling electrical issues in your 2010 Chevrolet Avalanche 1500? Flickering lights, unresponsive power windows, a security system that acts up, or even a frustrating no-start condition can all point to one culprit: a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, when the BCM falters, it can create a cascade of problems that are difficult to diagnose. This isn’t just an inconvenience; it can affect vehicle security and safety. We offer a direct, dependable solution with this VIN-programmed Body Control Module, designed to get your truck back to perfect working order without a trip to the dealership for expensive programming.
A Technician’s Notebook: The Telltale Signs of BCM Failure
In my 20 years of diagnostics, I’ve seen hundreds of GM trucks and SUVs come into the bay with symptoms that leave owners scratching their heads. A common case was a 2010 Tahoe (which uses a similar BCM) where the owner reported intermittent radio failure, the driver’s side power window working only when it wanted to, and the anti-theft light staying on. A scan tool showed a U0140 code—Lost Communication with Body Control Module. While wiring is always a possibility, experience has shown that these specific modules can suffer from internal circuit board failures, often due to voltage irregularities or moisture exposure over time. Replacing the BCM with a pre-programmed unit solved all the issues in under an hour, a fix we’ve replicated countless times.
Is Your Avalanche Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or failing to turn on.
- ✔ The security system light flashing, preventing the engine from starting (Passlock issues).
- ✔ The instrument cluster displaying incorrect information or warning lights that won’t turn off.
- ✔ Diagnostic trouble codes (DTCs) related to communication errors, such as U0140, U0155, or U0164.
- ✔ A/C and climate control functions not working correctly.
Your Straightforward Installation Guide
Installing your new 2010 Avalanche 1500 BCM is a manageable job for a confident DIYer. The BCM 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 and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: On the 2010 Avalanche, you’ll find it attached to a bracket under the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New Module: Mount the new BCM onto the bracket and securely plug in all the electrical connectors. You’ll hear a click when they are properly seated.
- Reconnect Power: Re-attach the negative battery terminal.
- Test and Verify: Turn the key to the ‘On’ position and test all body functions—windows, locks, lights, wipers, and radio—to ensure everything is working as expected. Start the vehicle to confirm it runs properly.
Important Post-Installation Information
Because this module is central to many systems, some vehicles may require additional steps after installation. These are not always necessary but are important to be aware of. A professional scan tool with GM-specific software is required for these procedures.
- Airbag System Sync: If your airbag warning light is on after installation, a procedure called “Setup SDM Primary Key in BCM” is needed to sync the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn might be required to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always refer to a factory service manual or consult with a qualified automotive technician if you are unsure about any part of the process.
Will This Fit My Vehicle?
This Body Control Module is a direct replacement for part number 20815898 and is compatible with a wide range of GM vehicles. It also interchanges with the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, and 95151084. Please verify your part number and check the detailed fitment list below.
ACADIA 07-12 Body Control (BCM); (LH dash)
CAPRICE 11-13 Body Control (BCM)
CAPTIVA SPORT 12 Body Control (BCM); (center dash), ID 20921435, 20921436, 22860591
CTS 08-13 Body Control (BCM); LH dash & RH dash
DTS 06-11 Body Control (BCM); (RH center dash)
ENCLAVE 08-12 Body Control (BCM); (LH dash)
EQUINOX 07-09 Body Control (BCM); (center dash)
ESCALADE / ESV / EXT 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
EXPRESS/SAVANA VANS 08-12 Body Control (BCM); (center dash)
G8 08-09 Body Control (BCM); (center dash)
HUMMER H2 08-09 Body Control (BCM); (LH firewall)
IMPALA 06-13 Body Control (BCM); (LH dash)
LUCERNE 06-11 Body Control (BCM); (right side dash)
MONTE CARLO 06-07 Body Control (BCM); (LH steering column)
OUTLOOK 07-10 Body Control (BCM); (center dash)
SRX 07-09 Body Control (BCM); LH dash
STS 10 Body Control (BCM); center dash
SUBURBAN 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TAHOE 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
TORRENT 07-09 Body Control (BCM); (center dash)
TRAVERSE 09-12 Body Control (BCM); (LH dash)
VUE 08-10 Body Control (BCM); (center dash)
YUKON / YUKON XL 1500 10 Body Control (BCM); (under steering column), ID 20815898 or 25892622
Frequently Asked Questions
Frequently Asked Questions
How does the VIN programming work?
After you place your order, simply provide us with your vehicle’s 17-digit VIN. We use this information to flash the module with the latest GM software specific to your truck’s factory options. This ensures it works correctly right out of the box.
Do I need to send my old BCM back?
No, there is absolutely no core charge for this part. You can keep your original module, which can be helpful for reference or if you ever need to revert to it for diagnostic purposes.
Is this a difficult part for a DIYer to install?
For someone with basic mechanical skills and tools, this is a very manageable repair. The main challenge is accessing the module under the dashboard. Our step-by-step guide above provides a clear overview of the process.
Will this fix my “Service Stabilitrak” or “Service Traction Control” message?
While a failing BCM can contribute to these warnings, they can also be caused by other components like wheel speed sensors or the steering angle sensor. A proper diagnosis is key, but if you have other BCM-related symptoms, replacing it is often the correct fix.
What tools do I need for the post-installation procedures?
The Airbag System Sync and Brake Pedal Position Relearn require a high-level bidirectional scan tool, such as a GM Tech 2, MDI, or a comparable professional-grade scanner. Most basic code readers cannot perform these functions.