Restore Your Truck’s Brain and End Electrical Frustrations
Are you chasing electrical gremlins in your GM truck or van? Flickering lights, malfunctioning power windows or locks, a security system that acts up, or an intermittent no-start condition can all point to one culprit: a failing Body Control Module (BCM). As a technician with over two decades of experience, I can tell you the BCM is the central nervous system for your vehicle’s comfort and convenience features. When it starts to fail, it can cause a cascade of bizarre, unrelated symptoms that are frustrating to diagnose and even more frustrating to live with.
This isn’t just a replacement part; it’s a complete, hassle-free solution. We take the guesswork and the expensive dealership trip out of the equation. Simply provide us with your vehicle’s VIN at checkout, and our experts will program this BCM with the latest GM software specific to your truck or van. It arrives at your door ready for installation, saving you significant time and money.
A Technician’s Notebook: The Silverado with a Mind of Its Own
A customer brought in his 2006 Silverado 2500 last month, completely fed up. The dome lights would flicker randomly, the driver’s side power lock worked only half the time, and occasionally the radio would shut off for no reason. He’d already replaced the battery and checked all the fuses. After connecting my diagnostic scanner, I saw communication errors between several modules, all pointing back to a single source. This is a classic symptom set I’ve seen hundreds of times. The internal circuits of the original 2003-2007 GM BCM were failing. We installed one of our pre-programmed modules, and within an hour, every single issue was resolved. The customer was thrilled to have his reliable work truck back without a massive dealership bill.
Is Your Truck or Van Showing These Signs?
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The vehicle’s security system or keyless entry is malfunctioning.
- ✔ Unexplained battery drain that leaves you with a dead battery.
- ✔ Warning lights on the dash, such as the airbag (SRS) light.
- ✔ Communication error codes stored when checked with a scan tool.
A Straightforward Guide to Installation
Replacing the 2003-2007 GM BCM is a manageable job for a DIYer with basic tools. Follow these steps to ensure a smooth process. Remember, your vehicle’s specific layout may vary slightly.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Locate the BCM: In most Silverado and Sierra pickups, the BCM is located under the driver’s side of the dashboard, near the steering column. For Express and Savana vans, it’s typically found behind the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the BCM. These are usually held in with clips or a few small screws.
- Disconnect and Remove: 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 your new, pre-programmed BCM in the same location and reconnect all the electrical connectors. Ensure they click securely into place.
- Post-Installation Procedures (CRITICAL): This is the most important step. Reconnect the battery. You will likely need a professional-grade diagnostic tool to perform two key functions:
- Airbag System: Perform the ‘Setup SDM Primary Key in BCM’ procedure to clear the airbag warning light and ensure the system is operational.
- Brake System: Some vehicles require a ‘Brake Pedal Position Sensor Calibration’ after BCM replacement. This is vital for proper brake light function and stability control performance.
- Test All Functions: Start the vehicle and test all the components controlled by the BCM: lights, locks, windows, radio, etc., to confirm the repair was successful.
Verified Fitment for These GM Models
This module is a direct-fit replacement for a wide range of popular GM vehicles and is an interchangeable replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15136876, and 10367689.
Fits Models Including:
- Chevrolet Silverado 1500/2500/3500 (2003-2007, Classic Body Style, see specific options)
- GMC Sierra 1500/2500/3500 (2003-2007, Classic Body Style, see specific options)
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet SSR (2003-2006)
Note: Please refer to the detailed fitment list in the product details to confirm compatibility with your specific year, model, and options (e.g., Crew Cab, transmission type). A correct 2003-2007 GM BCM is vital for proper operation.
Frequently Asked Questions
What information do you need to program the BCM?
After you complete your purchase, we require your 17-digit Vehicle Identification Number (VIN). This allows us to flash the module with the exact software and settings for your vehicle’s specific configuration, ensuring it works correctly right out of the box.
Is this part truly ‘plug and play’?
The module itself is programmed to be plug and play, meaning it will operate the basic body functions upon installation. However, as noted in the installation guide, critical safety systems like the airbag (SRS) and sometimes the brake pedal sensor will require a relearn procedure with a capable scan tool to function properly and clear warning lights.
Do I need to send my old BCM back?
No core charge or return is required for this part. You can keep or responsibly dispose of your old module.
What kind of tool is needed for the post-installation procedures?
A basic code reader will not be sufficient. You will need a bi-directional professional diagnostic scan tool that can access the BCM and perform security relearn functions like the ‘Setup SDM Primary Key’ procedure. Many independent repair shops have this equipment if you are not equipped for it.
Will this fix my check engine light?
A BCM typically controls body electronics, not engine functions. If your primary issue is a check engine light, you should first diagnose the codes to see if they are related to the Engine Control Module (ECM) instead. However, a faulty BCM can sometimes cause communication issues that trigger other warnings, so it can be a related factor.