Restore Your Truck’s Electrical Functions with a Reliable BCM
Is your 2010 Chevrolet Avalanche 1500 acting possessed? Flickering lights, power windows with a mind of their own, or a security system that randomly prevents you from starting the engine are all classic signs of a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable problems. In my 20+ years of diagnostics, I’ve seen how a failing BCM can make a perfectly good truck feel unreliable. Don’t let electrical gremlins sideline your vehicle.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and extra expense out of the repair by programming this module specifically for your truck’s VIN before it even leaves our facility. This means no extra trips to the dealership for expensive programming. You get a BCM loaded with the latest GM software updates, ready for installation right out of the box. It’s the most direct path to getting your Avalanche’s features working correctly again.
Common Signs of a Failing BCM
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system or keyless entry failing to work properly.
- ✔ The instrument cluster displaying false warnings or acting erratically.
- ✔ Communication error codes, such as U0140, U0155, or other U-codes, stored in the system.
- ✔ A no-start condition where the engine cranks but won’t fire due to anti-theft system issues.
A Technician’s Notebook: The Intermittent Gremlin
I remember a 2010 Tahoe (which uses a very similar system to the Avalanche) that came into the shop with the most bizarre, intermittent issues. The owner was at his wit’s end. One day the radio wouldn’t work, the next the driver’s window was stuck down. We couldn’t replicate the faults consistently. After checking grounds and wiring for hours, we hooked up a high-end scanner and monitored the BCM data stream. We saw data packets dropping out randomly. The BCM wasn’t completely dead; it was failing internally, causing these ghost-like problems. Swapping in a VIN-programmed BCM like this one solved every single issue instantly. It’s a reminder that with modern vehicles, the problem is often in the logic, not just the wiring.
Your Straightforward BCM Installation Guide
- ✔ Safety First: Disconnect the negative terminal from your truck’s battery to prevent any electrical shorts.
- ✔ Locate the BCM: On the 2010 Avalanche, the BCM is typically found under the steering column, often attached to a metal bracket. You may need to remove a lower dash panel for access.
- ✔ Disconnect Connectors: Carefully unplug the multiple wiring harnesses connected to the old BCM. Each connector has a locking tab that needs to be depressed or a lever that needs to be swung over to release it. Do not force them.
- ✔ Remove the Old Module: Unbolt or unclip the old BCM from its mounting location.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the same location. Securely reconnect all wiring harnesses, ensuring each one clicks into place.
- ✔ Reconnect Power: Reattach the negative battery terminal. The vehicle may need a few key cycles or a short drive for all systems to fully initialize.
Important Post-Installation Notes
While this module is programmed for your VIN, some vehicle systems require a ‘handshake’ with the new BCM. Depending on your specific vehicle, you may need a professional scan tool to perform a ‘Setup SDM Primary Key in BCM’ if the airbag light is on, or a ‘Brake Pedal Position Relearn’ for proper traction control function. Always consult a factory service manual for your specific model’s requirements.
Verified Vehicle Compatibility
This BCM is a direct replacement for part number 20864767 and a wide range of other GM part numbers. It is compatible with many vehicles, including but not limited to:
TAHOE 10 (under steering column, ID 20815898 or 25892622)
YUKON & YUKON XL 1500 10 (under steering column, ID 20815898 or 25892622)
ESCALADE, ESV, EXT 10 (under steering column, ID 20815898 or 25892622)
ACADIA 07-12 (LH dash)
ENCLAVE 08-12 (LH dash)
TRAVERSE 09-12 (LH dash)
IMPALA 06-12 (LH dash)
EXPRESS/SAVANA VANS 08-12 (center dash, check specific options)
…and many other models listed in the original fitment data. Please verify your part number or contact us with your VIN to confirm fitment.
Frequently Asked Questions
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 does ‘VIN-programmed’ mean?
It means we load the module with your vehicle’s specific software and configuration using your Vehicle Identification Number (VIN). This ensures it works correctly with the options your truck was built with, saving you a trip to the dealer for programming.
Is this difficult to install myself?
For someone with basic mechanical skills, the physical swap is straightforward. The BCM is usually accessible under the dash. The key benefit of our service is that the complex software programming is already done for you.
Will this fix my ‘Service Airbag’ light?
If the light is caused by a faulty BCM, this will resolve the root cause. However, after installation, a ‘Setup SDM Primary Key’ procedure may be required with a pro-level scan tool to sync the new BCM with the airbag system and turn off the light.
What information do you need from me?
After you place your order, we will need the 17-digit VIN from your vehicle to program the module correctly before shipping.