Restore Full Electrical Control to Your GM Truck or Van
Are you battling frustrating electrical gremlins in your Silverado, Sierra, Express, or Savana? Flickering lights, malfunctioning power windows and locks, or a security system that acts up are classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, a faulty BCM can cause a cascade of confusing issues. This isn’t just an annoyance; it can affect your vehicle’s security and daily usability. I’ve seen it countless times in my 20+ years of diagnostics: a perfectly good engine that won’t start, all because the BCM isn’t communicating correctly.
This is your direct-fit, reliable solution. We take the guesswork and high dealership costs out of the equation by offering a high-quality 2003-2007 GM BCM that comes fully programmed to your vehicle’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN at checkout, and our technicians will flash the module with the latest official GM software updates. This ensures seamless integration and performance, getting you back on the road without the need for expensive, specialized programming tools.
A Technician’s Notebook: The 2006 Sierra Mystery
A customer brought in his ’06 Sierra 2500 with a truly bizarre list of complaints. The radio would randomly turn off, the driver’s side power window worked intermittently, and the dome light would stay on for minutes after closing the door. He had already replaced the battery and checked all the fuses. After connecting my scan tool, I saw a slew of communication error codes pointing toward the BCM. Instead of a costly and time-consuming diagnostic deep-dive on the old unit, we opted for a VIN-programmed replacement. Once this new 2003-2007 GM BCM was installed, every single one of his electrical issues vanished. It was a 30-minute install that saved him hours of labor and the headache of a dealership visit.
Is Your Truck or Van Exhibiting These Issues?
A failing BCM can manifest in many ways. If you’re noticing any of the following, it’s a strong indicator that your Body Control Module needs attention:
- ✔ Power windows, door locks, or mirrors operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security system light is on, or the vehicle won’t start due to a security issue.
- ✔ The horn sounds randomly or doesn’t work.
- ✔ Warning lights on the dashboard (like the airbag light) that won’t go away.
- ✔ Communication errors with other modules when checked with a scan tool.
A Straightforward Guide to Installation
Replacing your BCM is a manageable job for a DIYer with basic tools. Follow these steps for a successful installation. Remember, your new module comes pre-programmed, which handles the most difficult part of the job!
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electrical components.
- 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 the center dash panel.
- Remove Trim Panels: Carefully remove any plastic trim or panels necessary to access the module.
- 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 place and securely reconnect all the electrical harnesses. Reassemble the dash panels.
- Reconnect Battery: Reattach the negative battery terminal.
- Perform Final Procedures: After installation, two critical steps are required. You must perform the ‘Setup SDM Primary Key in BCM’ procedure with a capable scan tool to clear the airbag light. Additionally, some vehicles may require a brake pedal position sensor recalibration. If you are unsure, consult a professional.
Verified Fitment for Your GM Vehicle
This Body Control Module is a direct replacement for part number 15136224 and interchanges with several other part numbers, including 15167329, 15194169, 15747545, 15116065, 15198115, 15136876, and 10367689. It is guaranteed to fit the following models (please check specific options):
- Chevrolet Silverado & GMC Sierra 1500/2500/3500 (2003-2007): Fits most non-Crew Cab models. For 2007, fits ‘Classic’ body style only. Please verify location (under steering column) and options.
- Chevrolet Express & GMC Savana 1500/2500/3500 (2003-2007): Fits models with the BCM located in the center dash, typically without the commercial tradesman package for 2004-2007.
- Chevrolet SSR (2003-2006): Direct fit for all models.
Frequently Asked Questions
What exactly does a Body Control Module (BCM) do?
The BCM is a computer that acts as the brain for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, security system, wipers, and the horn.
Why do you need my VIN to program the module?
Your Vehicle Identification Number (VIN) allows us to load the exact software and calibrations your vehicle had when it left the factory, including any specific options it has. This ensures perfect compatibility and function without a trip to the dealer.
Will this fix the ‘Security’ light on my dash?
In many cases, yes. A failing BCM is a very common cause of security system faults in these GM vehicles. This programmed module restores the proper communication to resolve those issues.
Is this a difficult part to install myself?
The physical replacement is straightforward for most DIYers with basic hand tools. The most important part is performing the post-installation relearn procedures for the airbag and brake systems, which may require a bi-directional scan tool.
What happens if I don’t do the airbag or brake relearn procedures?
If the ‘Setup SDM Primary Key’ procedure is not done, the airbag warning light will remain illuminated on your dashboard, indicating a fault in the safety system. Failing to recalibrate the brake pedal sensor (if required for your vehicle) could lead to improper brake light function or issues with other related systems.