Restore Control and Eliminate Electrical Headaches in Your GM Truck
If you’re battling bizarre electrical issues in your 2006-2007 Silverado or Sierra HD, you know how frustrating it can be. One minute your power windows work, the next they don’t. The security light flashes for no reason, or your interior lights have a mind of their own. As a technician with over two decades of diagnostic experience, I’ve seen these exact symptoms hundreds of times, and they almost always point to a failing Body Control Module (BCM). The BCM is the central nervous system for your truck’s body electronics, and when it falters, it creates chaos. This isn’t just an annoyance; it can affect vehicle security and safety systems.
This part, 15107479, is the definitive solution. We take the biggest hassle out of the repair process: programming. Simply provide your truck’s Vehicle Identification Number (VIN) after purchase, and our experts will flash this module with the latest GM software specific to your vehicle. It arrives at your door ready to install, saving you a costly and time-consuming trip to the dealership. This is the most direct path to getting your truck back to 100% factory functionality.
Is Your GM HD Truck Showing These Symptoms?
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior dome or dash lights flickering, staying on, or not working at all.
- ✔ The security system light is on, or the alarm randomly activates.
- ✔ Intermittent no-start conditions where the engine cranks but won’t fire.
- ✔ Communication error codes with other modules (U-codes) stored in the system.
- ✔ Inconsistent operation of the radio or instrument cluster gauges.
A Technician’s Notebook: The Silverado with a Ghost
I remember a 2007 Silverado 2500 that came into the shop with a list of problems that seemed unrelated. The owner had already replaced the battery and alternator. His complaint was that the radio would cut out, the driver’s side window would stop working after a few uses, and occasionally the truck wouldn’t start. We scanned it and found a slew of communication codes. Instead of chasing each individual problem, experience told me to look at the central hub—the BCM. After confirming power and ground to the module were good, we swapped in a VIN-programmed BCM. Every single phantom issue disappeared. It’s a classic case where one failing component creates a dozen confusing symptoms, and this 2006-2007 Silverado 2500 BCM was the direct fix.
A Straightforward Guide to Installation
Replacing the BCM is a manageable job for a DIYer with basic tools. It’s typically located under the driver’s side of the dashboard, near the steering column.
- Safety First: Always disconnect the negative terminal from your truck’s battery and wait a few minutes before starting work.
- Locate the BCM: On these GM trucks, find the module mounted under the steering column. You may need to remove a lower dash panel for access.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs, so be gentle. Once disconnected, unbolt the module from its bracket.
- Install the New Module: Mount your new, pre-programmed BCM in the same location and securely reconnect all electrical harnesses. You should hear a ‘click’ as they lock in place.
- Reconnect and Test: Re-attach the negative battery terminal. Turn the key to the ‘On’ position and test all functions: windows, locks, lights, and radio. Start the engine to ensure it runs correctly.
Important Post-Installation Steps
While this BCM is programmed for your VIN, your truck’s other modules may need to re-sync with it. Be aware of the following potential procedures:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be done. This requires a professional-grade scan tool to sync the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration may be needed to ensure proper brake light and traction control operation.
Disclaimer: Always consult a factory service manual or a qualified technician if you are unsure about any step.
Guaranteed Fitment for Your GM HD Truck
This Body Control Module is a direct-fit replacement for the following vehicles equipped with the 6-speed automatic transmission (RPO MW7) and Crew Cab configuration:
- 2006-2007 Chevrolet Silverado 2500 HD (2007 ‘Classic’ style with creased door skin)
- 2006-2007 Chevrolet Silverado 3500 (2007 ‘Classic’ style with creased door skin)
- 2006-2007 GMC Sierra 2500 HD (2007 ‘Classic’ style with creased door skin)
- 2006-2007 GMC Sierra 3500 (2007 ‘Classic’ style with creased door skin)
Frequently Asked Questions
Do I need to program this BCM?
No. This BCM arrives pre-programmed to your truck’s VIN. Just provide your VIN at checkout, and we handle the software flashing before shipping it to you.
Where is the BCM located on my 2006 Silverado 2500?
The Body Control Module is located inside the cab, under the driver’s side dashboard, typically near the steering column.
What happens if my airbag light comes on after I install it?
This means the new BCM needs to be electronically ‘introduced’ to your airbag module (SDM). A mechanic with a high-level scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to sync the systems.
Will this fix my power window and lock problems?
Yes, the BCM directly controls these functions. If the module is the root cause of the failure, this part will restore their proper operation.
Is there a core charge for my old part?
No, there is absolutely no core charge. You can keep your original module without needing to send it back.