End the Electrical Headaches in Your GM Truck
If you’re dealing with a 2007-2011 GMC Sierra 3500 that seems to have a mind of its own—with flickering lights, a dead HVAC system, or power windows that refuse to budge—you’re not alone. These frustrating and often unpredictable issues typically point to one culprit: a failing Body Control Module (BCM). As the central command for your truck’s body electronics, a faulty BCM can wreak havoc on daily operations. This replacement BCM, part number 15284816, is the definitive solution, arriving pre-programmed to your vehicle’s VIN for a hassle-free, direct-fit replacement.
A Technician’s Notebook
I recently had a 2009 Silverado 2500 in the bay with a classic case of BCM failure. The customer reported the radio would randomly shut off, the dome light would stay on, and occasionally the truck wouldn’t start, flashing the security light. After confirming power and grounds were good, we scanned the BCM and found a slew of communication error codes. These GMT900 platform trucks are notorious for BCM issues, often caused by voltage spikes or internal circuit board breakdown. Swapping in a VIN-programmed module like this one resolved all the ghost-like problems in under 15 minutes. It’s a reliable fix that gets these workhorses back on the job without a costly trip to the dealer.
Is Your GM Truck Showing These Electrical Gremlins?
A failing BCM doesn’t always trigger a check engine light. Instead, it creates a variety of bizarre symptoms. Here’s what to look for:
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ HVAC controls are unresponsive, or the blower motor won’t turn on.
- ✔ The anti-theft or security system acts up, preventing the engine from starting.
- ✔ Headlights, taillights, or interior lights flicker, stay on, or won’t turn on.
- ✔ An active airbag light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Unpredictable wiper operation or a horn that doesn’t work.
- ✔ Communication errors with other modules on the vehicle network.
Your 5-Minute Path to a Fully Functional Truck
Replacing the BCM is one of the easier electronic repairs you can do. No complex wiring or special tools are needed. Just provide your VIN at checkout, and we handle the programming.
- Safety First: Always disconnect the negative terminal from your truck’s battery before starting any electrical work.
- Locate the BCM: On most GM trucks and SUVs of this era, the BCM is located under the driver’s side of the dashboard, near the steering column. It’s a black box with several large multi-pin connectors.
- Swap the Module: Carefully unplug the electrical connectors from the old BCM. Release the mounting tabs or bolts holding it in place and remove it. Install the new module in its place and securely reconnect all connectors.
- Power Up: Reconnect the negative battery terminal. Start the vehicle and test all functions—lights, locks, windows, HVAC, etc.—to confirm the repair was successful.
- Post-Install Check: In some cases, an airbag light may persist. This requires an ‘SDM Key Sync’ procedure with a professional scan tool. A brake pedal position relearn may also be needed. See our FAQs for more details.
Verified Vehicle Compatibility
This module is a direct replacement for a wide range of General Motors trucks and SUVs. It is interchangeable with part numbers 25835966, 15263363, 15263497, 15878753, 15284816, 15943678, 15926094, 15940214, 25790508, 25790509, 25823558, 25823559, 25835965, 25844479, 25971916, 25971917, 15901388, 20939137, 20939138, and 22860591. Please verify your part number or contact us for fitment confirmation.
ESCALADE 07-11
ESCALADE ESV 07-11
ESCALADE EXT 07-11
SIERRA 1500 PICKUP 07-11
SIERRA 2500 PICKUP 07-13
SIERRA 3500 PICKUP 07-13
SIERRA DENALI 07-10
SIERRA DENALI 1500 11
SIERRA DENALI 2500 11-13
SIERRA DENALI 3500 11-13
SILVERADO 1500 PICKUP 07-11
SILVERADO 2500 PICKUP 07-13
SILVERADO 3500 PICKUP 07-13
SUBURBAN 1500 07-11
SUBURBAN 2500 07-11
TAHOE 07-11
YUKON 07-11
YUKON XL 1500 07-11
YUKON XL 2500 07-11
Frequently Asked Questions
Is this module really plug-and-play?
Yes. We program the module to your vehicle’s specific VIN before shipping. This ensures it communicates correctly with your truck’s other systems right out of the box, eliminating the need for a trip to the dealership for programming.
What if my airbag light is on after I install the new BCM?
This can happen. It means the new BCM needs to be synced with the airbag’s Sensing and Diagnostic Module (SDM). A mechanic with a bi-directional scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.
Where is the BCM located on my 2008 Sierra?
On the 2007-2013 GM truck platform, the Body Control Module is typically found under the driver’s side dashboard, to the left of the steering column. It is a black plastic box with multiple large wiring harnesses connected to it.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep your old module, so there’s no need to worry about return shipping or waiting for a core refund.
Will this fix a no-start issue caused by the security system?
In many cases, yes. The BCM is integral to the Pass-Key III/Passlock anti-theft systems. A faulty BCM can fail to recognize the key, triggering the security system and preventing the engine from starting. Replacing it often resolves these security-related no-start conditions.