Solve Persistent Electrical Gremlins in Your GM Truck
If you’re dealing with a frustrating array of electrical issues in your 2007-2011 Chevrolet Avalanche 1500, the Body Control Module (BCM) is often the culprit. As the central command center for your truck’s body electronics, a failing BCM can create havoc, from flickering lights and a dead A/C to security system lockouts. This replacement BCM, equivalent to part number 15878753, is the definitive solution. We pre-program it to your vehicle’s specific VIN, ensuring it works perfectly right out of the box, eliminating the need for a costly trip to the dealership for programming.
A Technician’s Notebook: The Tahoe with a Mind of Its Own
A customer brought in a 2009 Tahoe, complaining that the radio would turn on by itself, the door locks would cycle randomly, and the security light was on, preventing the engine from starting intermittently. They had already replaced the battery and checked the alternator. After hooking up my scanner, I saw a slew of communication error codes (U-codes) pointing to the BCM. In my 20+ years as a technician, I’ve seen this exact scenario dozens of times on this GM platform. A failing BCM can corrupt the data network. We installed a VIN-programmed module, and all the bizarre symptoms vanished instantly. It’s a classic fix for what seems like a complex electrical nightmare.
Is Your Avalanche Showing These Electrical Faults?
A faulty Body Control Module can manifest in numerous ways. If your truck is experiencing any of the following, it’s a strong indicator that your BCM needs replacement. This is the first step in diagnosing and resolving those hard-to-pinpoint issues.
- ✔ The A/C or heater blower motor works only on high speed or not at all.
- ✔ Your power windows, door locks, or interior dome lights operate intermittently or have failed completely.
- ✔ The airbag warning light is illuminated on the dash, often with a DTC like B1001.
- ✔ The security system acts up, causing a no-start condition or the alarm to go off unexpectedly.
- ✔ You’re experiencing strange electrical behavior, like the radio turning on/off or wipers activating on their own.
- ✔ Communication errors with other modules are present when scanning for codes.
Your 5-Minute BCM Installation Guide
One of the best parts about this solution is the ease of installation. For most DIYers, this is a job that can be completed in the driveway with basic hand tools in just a few minutes. Getting your 2007-2011 Avalanche 1500 BCM replaced is straightforward.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: On your Avalanche, the BCM is located under the driver’s side of the dashboard, typically to the left of the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unclip or unbolt the old module and remove it.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location. Securely plug in all the electrical connectors, making sure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all functions: lights, wipers, door locks, windows, and HVAC to confirm the repair was successful.
Post-Installation Note: In some cases, an airbag light may remain on. This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a Brake Pedal Position Relearn might be necessary. This does not indicate a faulty part but is a required security handshake between modules.
Guaranteed Fitment for Your GM Truck or SUV
This Body Control Module is a direct-fit replacement for a wide range of General Motors vehicles, restoring full electronic functionality. It is compatible with part numbers 15878753, 25844480, 25835966, 20939137, 22860591, and more. Please verify your vehicle from the list below to ensure proper fitment.
- Chevrolet Avalanche 1500 (2007-2011)
- Chevrolet Silverado 1500, 2500, 3500 (2007-2013)
- Chevrolet Suburban 1500, 2500 (2007-2011)
- Chevrolet Tahoe (2007-2011)
- GMC Sierra 1500, 2500, 3500 & Denali (2007-2013)
- GMC Yukon & Yukon XL (2007-2011)
- Cadillac Escalade, ESV, EXT (2007-2011)
Frequently Asked Questions About the 2007-2011 Avalanche 1500 BCM
Do I need to take my truck to the dealer after installing this BCM?
No. We pre-program the module to your vehicle’s VIN before shipping. This means it’s ready for immediate installation without requiring any additional programming from a dealership, saving you time and money.
What if my airbag light stays on after installation?
This is a normal security procedure on some GM vehicles. You will need a bidirectional scan tool to perform the ‘Setup SDM Primary Key in BCM’ function. This re-syncs the new BCM with your vehicle’s airbag system. Most professional repair shops can perform this service quickly.
Is there a core charge for my old part?
No, there is no core charge. You can keep your old module without the hassle of needing to return it.
Will this fix my specific problem, like the A/C not working?
The BCM controls many functions, including HVAC operations. If your A/C issues are accompanied by other electrical symptoms listed above, a faulty BCM is the most likely cause. However, always perform proper diagnostics to rule out other components like blower motor resistors or control heads.
What information do you need to program the module?
We only need your vehicle’s 17-digit Vehicle Identification Number (VIN). Please provide it during checkout to ensure we can program the module for your specific vehicle configuration.