Restore Your Truck’s Brain and End Electrical Frustrations
As a technician with over two decades of experience, I’ve seen firsthand the headaches a failing Body Control Module (BCM) can cause in GM trucks and vans. One minute your power windows work, the next they don’t. The radio acts possessed, the security light flashes for no reason, and you’re left chasing electrical gremlins that seem to have no source. The BCM is the central hub for your vehicle’s body electronics, and when it starts to fail, it can make your reliable workhorse feel unpredictable and broken.
This isn’t just another part; it’s a direct, reliable solution. We offer a genuine replacement BCM, part number 15167329, that arrives at your door completely programmed to your vehicle’s specific VIN. Forget about expensive towing fees or paying dealership prices for programming. Simply provide us with your VIN at checkout, and we’ll flash the module with the latest GM software updates. This ensures seamless communication with your vehicle’s other systems, restoring the functionality you depend on every day.
Case Study: A Tricky Diagnosis
A customer’s 2005 Silverado 2500 came into the shop last month with a bizarre list of issues: the dome light wouldn’t turn off, the driver’s side power lock was intermittent, and the radio would randomly shut off. He had already replaced the battery and checked all the fuses. After connecting my scan tool, I saw multiple communication loss codes with the BCM. These GMT800-platform trucks are notorious for water intrusion near the driver-side A-pillar, which drips directly onto the BCM under the dash. Sure enough, we found corrosion on the BCM connectors. Replacing it with a pre-programmed unit like this one solved all three problems instantly, saving the customer hundreds compared to a dealership visit.
Is Your GM Truck or Van Showing These Symptoms?
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Interior or exterior lights staying on or not turning on correctly.
- ✔ The security system light is on, or the engine won’t start due to a false theft-deterrent activation.
- ✔ Erratic behavior from the radio or climate control system.
- ✔ False warning messages on the driver information center (DIC).
- ✔ Diagnostic trouble codes (DTCs) related to communication loss with the BCM.
Your Straightforward Guide to BCM Replacement
Installing your new 2003-2007 GM BCM is a manageable job for a confident DIYer. The most important part is patience and taking care with the plastic trim panels. The location is typically under the driver’s side of the dashboard.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before working on any electronic components.
- Access the Module: Carefully remove the lower dash panel (knee bolster) below the steering column. It’s usually held in by a few screws and clips.
- Locate the BCM: Identify the BCM. It’s a black plastic box with several large multi-pin electrical connectors. In vans like the Express and Savana, it’s often located in the center dash area.
- Disconnect and Remove: Carefully release the locking tabs on each electrical connector and unplug them. Then, unbolt or unclip the old BCM from its mounting bracket and remove it.
- Install the New BCM: Mount your new, pre-programmed BCM in the same location. Reconnect all electrical connectors, ensuring they click securely into place.
- Perform Final Procedures: Re-install the dash panel and reconnect the negative battery terminal. You will need to perform the required post-installation procedures noted below.
Critical Post-Installation Steps
This is not optional. To ensure full functionality and safety, two key procedures are required after installing your new BCM. These steps synchronize the new module with your vehicle’s other critical systems.
- Airbag System Reset: The airbag warning light will be on after replacement. You must use a bi-directional scan tool to perform the ‘Setup SDM Primary Key in BCM’ procedure. This re-establishes the secure link between the BCM and the airbag system (SDM).
- Brake Pedal Position Sensor (BPPS) Relearn: Some vehicles may require a brake pedal recalibration to ensure the brake lights and stability control systems function correctly. This is also performed with a capable diagnostic tool.
Note: If you are not equipped to perform these relearn procedures, a local independent mechanic can typically complete them for you.
Will This Fit My Truck or Van?
This module is a direct replacement for part number 15167329 and interchanges with 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689. It fits a wide range of vehicles, including:
- Chevrolet Silverado 1500/2500/3500 (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 (2003-2007 Classic)
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet SSR (2003-2006)
Please use the detailed fitment list on this page to confirm compatibility with your specific year, model, and options (e.g., transmission type, cab configuration) before ordering.
Frequently Asked Questions
Do I really need to provide my VIN?
Yes, absolutely. Providing your 17-digit VIN is essential. We use it to program the BCM with the correct software and vehicle-specific options, ensuring it works correctly right out of the box.
What happens if I don’t do the airbag or brake relearn procedures?
The airbag warning light will remain on, meaning the SRS system is disabled and will not deploy in an accident. The brake lights may also not function correctly, which is a major safety hazard. These steps are mandatory for safety and proper operation.
Is this a difficult part to replace myself?
For someone with basic mechanical skills, the physical replacement is straightforward. It involves removing a dash panel and swapping the module. The most challenging part is the electronic relearn procedures, which require a professional-grade scan tool.
Will this 2003-2007 GM BCM fix my ‘Service 4WD’ light?
While a faulty 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 have the codes scanned to pinpoint the exact cause before replacing parts.
How can I be sure my BCM is the problem?
The best way is with a proper diagnosis using a scan tool that can communicate with the BCM. Look for a cluster of symptoms like intermittent power accessories, security issues, and communication-related trouble codes. The real-world story above is a classic example of BCM failure.