Restore Full Electrical Control to Your 2010 Chevrolet Avalanche 1500
If your Avalanche is plagued by bizarre electrical problems like flickering lights, malfunctioning power windows, or a security system that has a mind of its own, you’re likely dealing with a failing Body Control Module (BCM). As the central command center for your truck’s body electronics, a faulty BCM can cause widespread and frustrating issues. This isn’t just an annoyance; it can be a safety concern. I’ve spent over two decades in the garage, and I can tell you that intermittent electrical failures are some of the toughest problems for owners to live with. This replacement BCM, part number 20935349, is the reliable, straightforward solution you need.
Case Study: The Ghost in the Tahoe
A customer brought in a 2010 Tahoe—a close cousin to your Avalanche—with a list of complaints that sounded like a haunting. The radio would turn off randomly, the driver’s side power window would only work on Tuesdays (I’m barely exaggerating), and the anti-theft light would flash, preventing it from starting. After checking all the usual suspects like grounds and wiring, we hooked up the scope to the communication network. We found that the BCM was periodically dropping off the network, causing this chaos. Replacing the BCM solved every single issue. This is a classic failure mode for these modules, and our cloning service makes the fix easier than ever.
Is Your Avalanche Showing These Symptoms?
A failing BCM doesn’t always trigger a check engine light, making it tricky to diagnose. Here are the common signs I’ve seen in my shop that point directly to a faulty module:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights staying on, flickering, or refusing to turn on.
- ✔ The security system engaging randomly, causing a no-start condition.
- ✔ The horn honking unexpectedly or the key fob not working.
- ✔ False warnings on the instrument cluster (e.g., “Service StabiliTrak,” “Service Airbag”).
- ✔ Communication error codes stored, such as U0140 (Lost Communication with BCM).
The Power of Our Cloning Service
Forget expensive dealership programming and towing fees. Our unique cloning service makes this a simple, plug-and-play repair. Here’s how it works: you send us your original BCM. We then perform a direct data transfer of all your vehicle-specific information—including VIN, mileage, and key data—to this replacement module. We then ship both your original module and the ready-to-install replacement back to you. The result is a BCM that is 100% matched to your vehicle’s configuration, requiring no additional programming upon installation. It’s the most efficient way to get your 2010 Avalanche 1500 BCM replaced and your truck back to normal.
A Straightforward Guide to Installation
- ✔ Safety First: Disconnect the negative terminal from your vehicle’s battery and wait at least 10 minutes to allow all systems to power down.
- ✔ Locate the BCM: On your 2010 Avalanche, the BCM is typically located under the steering column, to the left of the brake pedal. You may need to remove a lower dash panel for access.
- ✔ Disconnect and Remove: Carefully unplug all 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, cloned BCM in the same location and securely plug in all the electrical connectors. You should hear a click as they lock into place.
- ✔ Reconnect and Test: Reinstall any trim panels you removed. Reconnect the negative battery terminal. Turn the key to the ‘ON’ position and test all functions: windows, locks, lights, wipers, and radio to confirm the repair.
Important Steps After Installation
While our cloning makes this a near plug-and-play process, some vehicle systems may require a quick synchronization. These procedures often require a professional-grade scan tool.
- Airbag System Sync: If the airbag light is on after installation, a technician will need to perform the “Setup SDM Primary Key in BCM” procedure to sync the modules.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn is needed to ensure proper brake light and stability control function.
- Disclaimer: Always refer to a factory service manual for your specific vehicle. Procedures can vary. If you are not comfortable performing these steps, we recommend consulting a qualified mechanic.
Verified Vehicle Compatibility
This BCM, part number 20935349, is a direct replacement for a wide range of GM vehicles and interchanges with numerous part numbers. Please verify your original part number or consult the list below. This module is a guaranteed fit for a 2010 Avalanche 1500 BCM and many other models.
Fits Models Such As: ACADIA 07-12, AVALANCHE 1500 10, CAPRICE 11-13, CAPTIVA SPORT 12, CTS 08-13, DTS 06-11, ENCLAVE 08-12, EQUINOX 07-09, ESCALADE 10, ESCALADE ESV 10, ESCALADE EXT 10, EXPRESS VANS 08-12, G8 08-09, HUMMER H2 08-09, IMPALA 06-13, LUCERNE 06-11, MONTE CARLO 06-07, OUTLOOK 07-10, SAVANA VANS 08-12, SRX 07-09, STS 10, SUBURBAN 1500 10, TAHOE 10, TORRENT 07-09, TRAVERSE 09-12, VUE 08-10, YUKON 10, YUKON XL 1500 10. (Please check specific options and IDs in the original listing data for precise fitment.)
Frequently Asked Questions
Frequently Asked Questions
What is a BCM cloning service?
Cloning is a process where we transfer the complete software and vehicle-specific data (like VIN and key information) from your original BCM to this replacement unit. This ensures it works perfectly with your truck without needing a trip to the dealer for programming.
Do I need any special tools to install this?
For the physical installation, you’ll only need basic hand tools like a socket set and a trim removal tool. However, some post-installation procedures, like an airbag system sync, may require a professional diagnostic scan tool.
Will this fix my specific electrical problem?
This part corrects issues caused by a faulty BCM. If your vehicle exhibits symptoms like erratic lights, locks, and windows, or has BCM-related diagnostic codes, this is very likely the solution. Proper diagnosis is always recommended.
What do I do with my old BCM?
You must send your original BCM to us for the cloning service. After we transfer the data, we will ship your original module back to you along with the ready-to-install replacement. We do not keep your old part.
Is this a guaranteed fit for my 2010 Avalanche?
Yes, this 2010 Avalanche 1500 BCM is a confirmed fit. Our cloning process ensures it is programmed specifically for your vehicle’s options and VIN, guaranteeing compatibility.