Restore Full Control Over Your Vehicle’s Electronics
Is your Silverado, Sierra, or Express van acting possessed? Flickering lights, unresponsive power windows, or a security system that randomly engages are classic signs of a failing Body Control Module (BCM). As the central command for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable issues. I’ve spent over 20 years diagnosing these exact problems, and a failing BCM is often the culprit behind electrical gremlins that seem impossible to trace.
This isn’t just a replacement part; it’s a direct solution. We take the guesswork and high dealership costs out of the equation. By providing us with your Vehicle Identification Number (VIN) at checkout, you receive a BCM that is professionally programmed with the latest GM software specific to your truck or van. This ensures seamless integration and restores the reliable performance you depend on, whether you’re on the job site or heading out for the weekend.
A Technician’s Notebook: The Case of the Phantom Drain
I once had a 2005 Silverado 2500 in my bay with a battery that would die overnight. The owner had replaced the battery and alternator twice. After checking for parasitic draws, I noticed the BCM wasn’t putting the interior lighting circuit to sleep. It was a tiny, almost undetectable draw, but enough to drain the battery over 8-10 hours. Swapping in a correctly programmed BCM didn’t just fix the dead battery; it also resolved an intermittent radio issue the owner had forgotten to mention. This is a perfect example of how one module can cause multiple, seemingly unrelated problems.
Is Your Truck or Van Showing These Symptoms?
- ✔ Erratic or non-functional interior and exterior lights.
- ✔ Power windows, locks, or mirrors that work intermittently or not at all.
- ✔ The security system or alarm engaging without reason.
- ✔ The radio or infotainment system turning on/off or behaving strangely.
- ✔ Dashboard warning lights that have no apparent cause.
- ✔ Communication error codes, often in the U-series (e.g., U0140 – Lost Communication With Body Control Module).
- ✔ A persistent battery drain that can’t be traced to other components.
Your Straightforward Guide to BCM Installation
Replacing the BCM is a manageable job for a confident DIYer. The location varies slightly between trucks and vans, but the process is similar. This is a general guide; always consult a service manual for your specific model.
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts.
- Locate the BCM: On Silverado and Sierra pickups, it’s typically found under the driver’s side of the dashboard, near the steering column. On Express and Savana vans, it’s usually located behind the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module. Keep track of all screws and clips.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. They have locking tabs that need to be pressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM in place and securely reconnect all electrical harnesses. Ensure they click into place.
- Reconnect and Test: Reassemble the dash panels and reconnect the negative battery terminal. Start the vehicle and test all body functions—lights, locks, windows, radio, etc.—to confirm the repair.
Important Post-Installation Procedures
While this BCM comes pre-programmed to your VIN, some vehicle systems may require a ‘handshake’ with the new module. Depending on your specific model and options, you may encounter the following:
- Airbag System Sync: If your airbag warning light is on after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor relearn to ensure correct brake light operation and stability control function.
This replacement 2003-2007 GM BCM is a reliable and cost-effective way to solve complex electrical issues. With no core charge, you can keep your old part and avoid the hassle of returns. Get your vehicle’s features working correctly again.
Frequently Asked Questions About This 2003-2007 GM BCM
Frequently Asked Questions
Why do you need my VIN?
Your VIN allows us to program the BCM with the exact software and settings for your vehicle’s specific options, such as power windows, keyless entry, and security system. This ensures a true plug-and-play installation without needing a trip to the dealer.
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 power windows, locks, lights, wipers, the security system, and the radio.
Is this a difficult part to install myself?
For someone with basic mechanical skills and tools, this is a very manageable task. The main challenge is accessing the module, which is typically under the dashboard. Our pre-programming saves you the most complex step.
What does ‘No Core Charge’ mean?
It means you don’t have to send your old, faulty BCM back to us. This saves you time and the cost of return shipping. You can simply keep or dispose of your original part.
What if the airbag light comes on after I install it?
This is not uncommon. It simply means the new BCM needs to be electronically introduced to the airbag system (SDM). A repair shop with a professional-grade scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this BCM fit my Crew Cab truck?
No, the fitment data specifically indicates this module is for models ‘exc. Crew Cab’ (excluding Crew Cab). Please verify your cab configuration before ordering to ensure compatibility.
Verified Fitment For Your GM Truck or Van
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It fits a wide range of vehicles, including:
- 2003-2006 Chevrolet Silverado & GMC Sierra 1500/2500/3500 (Excluding Crew Cab)
- 2007 Chevrolet Silverado & GMC Sierra ‘Classic’ (Excluding Crew Cab)
- 2003-2007 Chevrolet Express & GMC Savana 1500/2500/3500 Vans
- 2003-2006 Chevrolet SSR
Please use the detailed fitment list to confirm your specific model, year, and options before purchasing.