Restore Full Electrical Function to Your GM Truck or SUV
Are you chasing down frustrating electrical gremlins in your 2010 Chevrolet Avalanche 1500? Issues like flickering dash lights, power windows with a mind of their own, or a security system that prevents your truck from starting can often be traced back to one single component: a failing Body Control Module (BCM). As a technician with over two decades of experience, I’ve seen how a faulty BCM can turn a reliable vehicle 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 a replacement part; it’s a complete, hassle-free solution. We take the guesswork and expensive dealership visits out of the equation. Simply provide your vehicle’s VIN at checkout, and we will flash this BCM with the latest GM software specific to your 2010 Avalanche 1500 BCM. It arrives at your door ready for installation, saving you time, money, and the need for specialized programming tools.
A Technician’s Notebook: The Avalanche That Wouldn’t Cooperate
A customer brought in his 2010 Avalanche 1500 last month with a bizarre list of complaints. The radio would randomly shut off, the driver’s side power window worked intermittently, and sometimes the truck wouldn’t start, displaying a ‘Service Theft Deterrent System’ message. He had already replaced the battery and checked all the fuses. After connecting my scan tool, I noticed a loss of communication with multiple modules. This pointed directly to the BCM. A failing BCM often acts like a bad switchboard operator, dropping calls between different electronic systems. We installed a VIN-programmed BCM, and within an hour, all the strange electrical issues were gone. It’s a classic case where one part solves a dozen different-seeming problems.
Is Your Vehicle Exhibiting These Common BCM Failure Signs?
- ✔ Intermittent or non-functional power windows, door locks, or interior lights.
- ✔ Erratic dashboard gauges or warning lights (including security or airbag lights).
- ✔ The horn sounding off unexpectedly or not working at all.
- ✔ Remote keyless entry failing to respond.
- ✔ A no-start condition accompanied by a security system message.
- ✔ Headlights or taillights staying on and draining the battery.
A Straightforward Guide to Your BCM Installation
Replacing the 2010 Avalanche 1500 BCM is a manageable job for a confident DIYer. In most of these trucks, it’s located under the steering column, accessible from the driver’s side footwell.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow capacitors to discharge.
- Locate the Module: Find the BCM, typically mounted to a bracket under the driver’s side dashboard, near 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 BCM: Mount your new, pre-programmed BCM in place and securely reconnect all the electrical harnesses. Ensure they click into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Final Procedures: After installation, a few critical relearn procedures are necessary for full functionality.
Important Post-Installation Steps
To ensure all systems communicate correctly with your new BCM, a couple of final steps are required. This is crucial for safety and performance. While our programming handles the heavy lifting, your vehicle needs to recognize the new component.
- Airbag System Reset: The ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-end scan tool. This ensures the airbag system (SDM) communicates correctly with the new BCM and extinguishes the airbag warning light.
- Brake Pedal Position Sensor Relearn: Some vehicles require this recalibration to ensure the brake lights and stability control systems function correctly. This also typically requires a diagnostic tool.
If you are not equipped to perform these final steps, a local qualified mechanic can complete them quickly.
Verified Vehicle Compatibility
This Body Control Module is a direct replacement for a wide range of General Motors vehicles and supersedes numerous part numbers, ensuring you get the right component. It is compatible with 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. Please verify fitment for your specific model from the list below:
ACADIA 07-12 (LH dash)
CAPRICE 11-13
CAPTIVA SPORT 12 (center dash), ID 20921435, 20921436, 22860591
CTS 08-13 (LH dash)
DTS 06-11 (RH center dash)
ENCLAVE 08-12 (LH dash)
EQUINOX 07-09 (center dash)
ESCALADE 10 (under steering column), ID 20815898, 25892622
ESCALADE ESV 10 (under steering column), ID 20815898, 25892622
ESCALADE EXT 10 (under steering column), ID 25892622
EXPRESS 1500 VAN 08-12 (center dash)
EXPRESS 2500 VAN 08-12 (center dash)
EXPRESS 3500 VAN 08-12 (center dash)
G8 08-09 (center dash)
HUMMER H2 08-09 (LH firewall)
IMPALA 06-12 (LH dash)
IMPALA 13 (LH dash), ID 22820315
LUCERNE 06-11 (right side dash)
MONTE CARLO 06-07 (LH steering column)
OUTLOOK 07-10 (center dash)
SAVANA 1500 VAN 08-12 (center dash)
SAVANA 2500 VAN 08-12 (center dash)
SAVANA 3500 VAN 08-12 (center dash)
SRX 07-09 (LH dash)
STS 10 (center dash)
SUBURBAN 1500 10 (under steering column), ID 20815898, 25892622
TAHOE 10 (under steering column), ID 20815898, 25892622
TORRENT 07-09 (center dash)
TRAVERSE 09-12 (LH dash)
VUE 08-10 (center dash)
YUKON 10 (under steering column), ID 20815898, 25892622
YUKON XL 1500 10 (under steering column), ID 20815898, 25892622
Frequently Asked Questions
Do I need to send my old BCM to you?
No, there is no core charge or need to send in your original part. This is a direct replacement that we program before shipping.
What information do you need to program the BCM?
We require your vehicle’s 17-digit Vehicle Identification Number (VIN) to program the module with the correct software and vehicle-specific options from GM’s database.
Is this a simple plug-and-play installation?
It is nearly plug-and-play. We handle the main programming, but as with any BCM replacement on these vehicles, a few final relearn procedures (like for the airbag system) must be performed with a scan tool after installation for full and safe operation.
Will this fix my ‘Service Theft Deterrent System’ warning?
In many cases, yes. The BCM is a key part of the Passlock/Passkey anti-theft system. A failing BCM is a very common cause of this specific error message and a no-start condition.
What if I have the wrong part number?
This module, part number 20921435, replaces a long list of previous GM part numbers. As long as your vehicle is on the compatibility list, this module will function correctly once programmed to your VIN.