Tired of Your Truck’s Electrical Gremlins? Take Control Again.
Are you dealing with a vehicle that seems to have a mind of its own? Flickering dash lights, power windows that won’t cooperate, a security light that stays on, or a horn that sounds off randomly are all classic signs of a failing Body Control Module (BCM). As the central command center for your vehicle’s electronic accessories, a faulty BCM can cause a cascade of frustrating and unpredictable problems. This isn’t just an annoyance; it’s a breakdown in your vehicle’s core functionality.
This direct-fit 2003-2007 GM BCM is the definitive solution to restore order. Forget expensive diagnostic fees and the hassle of dealership appointments. We make the process simple: after your purchase, provide us with your vehicle’s VIN. Our technicians will then program the module with the latest GM software specific to your truck or van. It arrives at your door ready for installation, saving you time, money, and headaches.
A Technician’s Notebook: The Case of the Haunted Silverado
Just last month, a 2006 Silverado 1500 was brought into the shop. The owner was at his wit’s end. The radio would turn on and off, the dome light would flicker while driving, and occasionally, the security system would prevent the truck from starting. He had already replaced the battery and checked the main grounds. After connecting my scan tool, I noticed a slew of communication error codes (U-codes) pointing back to one component: the BCM. Water intrusion from a leaky windshield seal had caused corrosion on the BCM’s circuit board—a common issue I’ve seen on dozens of these GMT800 platform trucks. Swapping in a pre-programmed BCM like this one solved every single issue in under an hour.
Is Your Truck or Van Showing These Symptoms?
- ✔ Power windows, locks, or mirrors working intermittently or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not turning on.
- ✔ The security or anti-theft light is illuminated, causing a no-start condition.
- ✔ The horn or alarm sounds without reason.
- ✔ Inaccurate gauge readings on the instrument cluster.
- ✔ Communication error codes stored in other modules.
A Straightforward Guide to Installation
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning 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. For Express and Savana vans, it’s typically behind the center dash panel.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old BCM from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in the same location and securely re-attach all electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Re-attach the negative battery terminal.
- Perform Final Procedures: Follow the post-installation steps below to ensure all systems, like the airbag and brakes, are correctly initialized.
Important Post-Installation Steps
After installing your new 2003-2007 GM BCM, a couple of crucial relearn procedures are necessary to ensure full functionality and safety. These steps require a professional-grade scan tool.
- Airbag System Reset: To clear the airbag warning light, you must perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes communication between the new BCM and the airbag system’s Sensing and Diagnostic Module (SDM).
- Brake Pedal Position Sensor (BPPS) Relearn: Some vehicles may require the brake pedal position to be recalibrated. This ensures the brake lights and stability control systems function correctly with the new module.
Verified Fitment For Your GM Vehicle
This module is a direct replacement for part numbers 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It is compatible with a wide range of models, including:
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Express 1500/2500/3500 (2003-2007)
- GMC Savana 1500/2500/3500 (2003-2007)
- Chevrolet SSR (2003-2006)
Please refer to the detailed fitment list in the product specifics to confirm compatibility with your exact year, model, and options.
Frequently Asked Questions
Why do you need my VIN?
Your Vehicle Identification Number (VIN) allows our technicians to program the BCM with the exact software and vehicle-specific options (like power windows, keyless entry, etc.) that your truck or van was built with. This ensures seamless, plug-and-play functionality.
Is this a difficult part to replace myself?
For a DIYer with basic tools, the physical swap is straightforward. The BCM is usually accessible under the dash. The most critical part is having access to a capable scan tool for the post-installation relearn procedures (airbag and brake sensor), which may require help from a local mechanic if you don’t own one.
Will this fix my ‘Service 4WD’ light?
While a BCM can cause a variety of issues, a ‘Service 4WD’ message is more commonly related to the Transfer Case Control Module (TCCM), the encoder motor, or the switch on the dash. It’s best to diagnose that specific system first, though a faulty BCM can sometimes cause communication errors that trigger other warnings.
What happens if I don’t do the airbag (SDM) relearn procedure?
If the ‘Setup SDM Primary Key in BCM’ procedure is not performed, the airbag warning light will remain illuminated on your dashboard, and more importantly, the supplemental restraint system (airbags) may not function correctly in the event of a collision.
Is this a new or used part?
This is a high-quality, inspected, and tested recycled OEM part. Each unit is verified for full functionality before being programmed with the latest software for your specific vehicle, offering OEM reliability at a fraction of the cost.