Are you chasing down bizarre electrical problems in your GM truck or van? One minute the dome light works, the next it doesn’t. Your power windows have a mind of their own, and a “Service Security System” message keeps popping up. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times. More often than not, the culprit isn’t a dozen different bad switches or relays—it’s a failing Body Control Module (BCM).
The BCM is the nerve center for your vehicle’s body electronics. When it starts to fail, it can cause a cascade of frustrating and seemingly unrelated symptoms. This isn’t just an inconvenience; it can affect safety systems like your brake lights. Instead of spending weeks and hundreds of dollars throwing parts at the problem, get the direct solution. This replacement BCM is the reliable fix you need, and best of all, we handle the programming for you.
Is Your Truck Showing These Symptoms?
- ✔ Erratic or non-working interior and exterior lights (headlights, taillights, dome lights).
- ✔ Power windows, door locks, or mirrors functioning intermittently or not at all.
- ✔ The horn sounding randomly or not working when pressed.
- ✔ Instrument cluster warning lights appearing for no reason, such as the airbag or ABS light.
- ✔ Vehicle security system issues, including false alarms or failure to start (Passlock/Passkey problems).
- ✔ Communication failure codes stored in the system, such as U0140 (Lost Communication With Body Control Module).
I remember a 2006 Silverado 2500 that came into the shop that had its owner completely stumped. The power locks would cycle on their own while driving, the radio display would flicker, and the driver’s side low beam was dead, even with a new bulb and fuse. The owner had replaced the headlight switch and the door lock switch to no avail. After a quick scan, I saw multiple communication codes pointing to the BCM. The internal circuits on these modules, especially the solder joints, can degrade over time from heat and vibration. We installed a pre-programmed BCM, and every single issue was resolved instantly. It’s a classic case where the central component was the single point of failure for many symptoms.
Why Our 2003-2007 Sierra 2500 BCM is the Smart Choice
Forget the hassle and expense of a dealership visit. We make this repair straightforward. Simply provide us with your vehicle’s VIN during checkout, and our technicians will program this module with the latest GM software specific to your truck or van. It arrives at your door ready for installation. This not only ensures compatibility but also means all your vehicle’s original features will work as intended. Plus, there is no core charge, so you don’t have to worry about the cost or logistics of sending your old, faulty part back.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most Silverado and Sierra pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s typically behind a panel in the center dash area.
- ✔ Remove Trim Panels: You may need to remove a lower dash panel or knee bolster to gain access. These are usually held in with a few screws or clips.
- ✔ Disconnect and Remove: Carefully unplug the 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 module in place and securely reconnect all the electrical harnesses. Ensure each connector clicks into place.
- ✔ Reconnect Battery: Re-install any trim panels you removed and then reconnect the negative battery terminal.
Important Post-Installation Steps
After installation, your vehicle should start and run. However, depending on your specific model and options, a couple of final sync procedures may be needed:
- Airbag System Sync: If your airbag warning light is on after the swap, a professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure correct brake light operation and to prevent issues with the traction control system. This also typically requires a capable diagnostic tool.
Disclaimer: Vehicle systems vary. We always recommend consulting a factory service manual or a qualified professional if you are unsure about any step of the process.
Verified Vehicle Compatibility
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following vehicles with the specified options:
2003 (1500, 2500, 3500) – Center Dash Location
2004-2007 (1500, 2500, 3500) – Center Dash, w/o commercial tradesman package
Chevrolet Silverado & GMC Sierra Pickups (Classic Body Style):
2003-2006 (1500, 2500, 3500) – Under Steering Column, exc. Crew Cab
2007 Classic (1500, 2500, 3500) – Under Steering Column, exc. Crew Cab (Note: Check for creased door skin to confirm Classic style)
Chevrolet SSR:
2003-2006 – All models
Frequently Asked Questions
Do I need to send you my old BCM?
No. This product comes with no core charge. You can keep your original module.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit Vehicle Identification Number (VIN). We cannot ship the module until we receive this information to program it correctly.
Is this a plug-and-play part?
Yes, for the most part. Because we program it to your VIN, your vehicle will start and run. However, as noted in the description, some vehicles may require an additional relearn procedure for the airbag or brake pedal position sensor, which requires a professional scan tool.
Will this fix my specific problem?
This BCM corrects failures within the module itself. While it resolves the vast majority of electrical body issues like faulty lights, windows, and locks, it’s essential to ensure your vehicle’s wiring and related components (like switches and motors) are in good condition.
What does ‘exc. Crew Cab’ mean in the fitment list?
This means the module is specified for truck models that are NOT Crew Cabs (i.e., it fits Regular Cab and Extended Cab models for the years listed). Crew Cab models often use a different BCM part number.