Restore Full Control of Your Truck’s Electronics
If you’re dealing with bizarre electrical problems in your 2010 Chevrolet Avalanche 1500, you’re not alone. Flickering lights, power windows with a mind of their own, a security system that won’t let you start the engine—these are classic signs of a failing Body Control Module (BCM). As the central hub for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating issues. This isn’t just an inconvenience; it can affect your vehicle’s safety and security. After 20 years of diagnosing these systems, I can tell you that swapping the BCM is often the most direct path to a permanent solution.
This isn’t just a replacement part; it’s a complete, ready-to-install solution. We take the guesswork and dealer expense out of the equation by programming this BCM specifically to your truck’s Vehicle Identification Number (VIN) before it ships. This ensures seamless integration with your vehicle’s existing systems and options. You get a reliable part loaded with the latest GM software updates, designed to restore function and performance.
A Technician’s Notebook
I remember a 2010 Tahoe—which uses a nearly identical electrical platform to your Avalanche—that came into the shop with a laundry list of complaints. The owner said the radio would randomly shut off, the driver’s side power lock was dead, and the dome lights would stay on, draining the battery. He had already replaced the battery and checked fuses. We hooked up the scan tool and found a series of U-codes (communication errors) all pointing back to the BCM. A new, VIN-programmed module like this one had all those gremlins sorted out in under an hour. It’s a prime example of how one component can create widespread, confusing symptoms.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional power windows, door locks, and mirrors.
- ✔ Interior or exterior lights that won’t turn on or off correctly.
- ✔ The security or anti-theft light stays on, often causing a no-start condition.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Inaccurate or dead gauges on the instrument cluster.
- ✔ Diagnostic Trouble Codes (DTCs) such as U0140, B1001, or other B-series and U-series codes.
A Straightforward Guide to Installation
Installing your new 2010 Avalanche 1500 BCM is a manageable job for a confident DIYer. The module is typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before starting work.
- Locate the BCM: On the Avalanche, it’s usually mounted to a bracket under the driver-side dash. 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: Bolt the new, pre-programmed BCM into place. Reconnect all electrical connectors, ensuring they click securely into place.
- Reconnect Battery: Re-attach the negative battery terminal. Turn the key to the ‘On’ position (without starting the engine) and check for normal function of lights and accessories.
Important Post-Installation Steps
Because this 2010 Avalanche 1500 BCM is new to your vehicle’s network, a couple of system relearn procedures may be needed. These are standard steps when replacing a BCM.
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is required to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: Some models may require this recalibration to ensure the brake lights and traction control system function correctly.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15921353 and is interchangeable with a wide range of other part numbers. It fits the following vehicles, but always verify your specific part number or contact us with your VIN.
Note: Specific options and IDs may apply. Please refer to the original fitment data or provide your VIN for confirmation.
Frequently Asked Questions
How does the VIN programming work?
After you place your order, you’ll need to send us your 17-digit VIN. Our technicians use this to load the correct GM software and vehicle-specific settings onto the BCM before we ship it. This makes the installation process much simpler.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
What tools are required for the installation?
Basic hand tools like a socket set and screwdrivers are usually all that’s needed for the physical swap. However, as noted, a professional-grade bidirectional scan tool may be required for post-installation procedures like the airbag system sync.
Is this a guaranteed fix for my truck’s problems?
This 2010 Avalanche 1500 BCM resolves the vast majority of issues listed in the symptoms section. However, proper vehicle diagnosis is key. If you’re unsure, we recommend consulting a professional mechanic to confirm the BCM is the source of the fault before ordering.
What if I still have an airbag light after installation?
This is a normal security measure. The new BCM needs to be electronically ‘introduced’ to the airbag’s Supplemental Deployment Module (SDM). A shop with a GM-capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to clear the light.