Tired of Chasing Electrical Gremlins in Your GM Truck?
If your 2007-2011 GMC Sierra 3500 is acting possessed—with flickering lights, dead power windows, a temperamental climate control system, or a security light that won’t quit—you’ve likely met the culprit: 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 seemingly unrelated issues. Stop throwing parts at the problem. This OEM-quality, VIN-programmed BCM is the definitive solution to restore full functionality and peace of mind, getting your workhorse back on the road without an expensive trip to the dealership.
A Technician’s Notebook: The Grounding Ghost
I once had a 2009 Sierra 2500 in my bay with the strangest symptoms. The radio would cut out on bumpy roads, the driver’s side power lock worked only half the time, and the customer complained of intermittent stalling. The codes were all over the place. After confirming the BCM was the likely source, we installed a new one. A week later, the customer was back with similar issues. A deeper dive revealed the real problem: a corroded BCM ground connection behind the driver’s side kick panel. The original BCM had been damaged by the poor ground. This is why I always tell my customers: when you replace a BCM, always inspect and clean the ground points. It’s a 5-minute check that can save you from a costly comeback.
Is Your Sierra Exhibiting These Telltale Signs?
A failing BCM doesn’t always trigger a check engine light, but it leaves a trail of clues. If you’re experiencing any of the following, it’s time to inspect your BCM:
- ✔ Unresponsive power windows, door locks, or mirrors.
- ✔ Interior or exterior lights that stay on, flicker, or don’t work at all.
- ✔ HVAC and climate control problems, like a blower motor that won’t turn on or is stuck on high.
- ✔ An illuminated airbag light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Security system malfunctions, causing no-start or random stalling conditions.
- ✔ Erratic windshield wiper operation.
- ✔ A cluster of communication codes (U-codes) stored in various modules.
Your 5-Minute Installation Guide
Getting your truck back to normal is easier than you think. This module is designed for a straightforward swap that most DIYers can complete in their driveway.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before beginning.
- Locate the BCM: On most GM trucks of this era, the BCM is located under the driver’s side dashboard, near the steering column. It’s a black box with several large electrical connectors.
- Swap the Module: Carefully unplug the connectors from the old BCM. They have release tabs that need to be pressed. Remove any mounting bolts or clips holding the old module, and install the new one in its place.
- Reconnect and Test: Securely plug all connectors into your new, pre-programmed BCM. Reconnect the battery terminal. Start the vehicle and test all functions: lights, locks, windows, wipers, and HVAC to confirm the repair.
Post-Installation Note: In some cases, particularly if you had an airbag light on, a ‘Setup SDM Primary Key’ procedure may be needed using a compatible professional scan tool. This re-syncs the new BCM with the airbag system. Additionally, a Brake Pedal Position relearn might be required. For full details, see our FAQ section below.
Verified Fitment for Your GM Truck or SUV
This module is a direct replacement for part number 15284816 and other interchangeable parts. While this listing is focused on the 2007-2011 Sierra 3500 BCM, it also fits a wide range of GM vehicles. Please verify your part number or contact us with your VIN to ensure compatibility.
AVALANCHE 1500 (2007-2011)
CADILLAC ESCALADE, ESV, EXT (2007-2011)
GMC SIERRA 1500/2500/3500 & DENALI (2007-2013)
GMC YUKON & YUKON XL (2007-2011)
CHEVROLET SILVERADO 1500/2500/3500 (2007-2013)
CHEVROLET SUBURBAN 1500/2500 (2007-2011)
CHEVROLET TAHOE (2007-2011)
Note: Some 2007 models require the ‘new style’ (smooth door skin). Some later models may have specific ID requirements (e.g., ID 25835966). Always match your part number.
Frequently Asked Questions
Frequently Asked Questions
Do I need to program this BCM at the dealership?
No. We pre-program the module to your vehicle’s specific VIN before shipping. This makes it a plug-and-play solution, saving you hundreds in dealership programming fees.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer that acts as the central hub for your vehicle’s body electronics. It controls non-engine related functions like lights, windows, locks, wipers, the security system, and the HVAC system.
What if my airbag light is still on after installation?
If the airbag light persists (often with code B1001), it means the BCM needs to be synced with the Sensing and Diagnostic Module (SDM). This requires a professional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This is a simple electronic handshake that takes a qualified technician only a few minutes.
Is there a core charge for my old part?
Absolutely not. There is no core charge on this module. You can keep your old part, so there’s no need to worry about return shipping or waiting for a refund.
Which part numbers does this module replace?
This is a direct replacement for part number 15284816 and is also interchangeable with numerous others, including 25844480, 25835966, 15263363, 15878753, 15943678, 20939137, and 22860591, among others.