Restore Full Electrical Function to Your GM Vehicle
Are you chasing down frustrating electrical problems in your work van or truck? A faulty Body Control Module (BCM) is often the culprit behind a host of baffling issues, from flickering lights to a non-responsive climate control system. This replacement BCM, equivalent to GM part number 15137394, is the definitive solution for your 2004-2007 Express 2500 BCM and a wide range of other GM vehicles. We pre-program it to your vehicle’s specific VIN, ensuring it works correctly right out of the box without any need for expensive dealership visits for programming.
From the Diagnostic Bay: The Case of the Commercial Van
I had a 2006 Express 2500 work van come into my shop that was driving the owner crazy. The complaint was intermittent: some days the power locks wouldn’t work, other days the radio would stay on after the key was removed, and occasionally the security light would flash, preventing it from starting. The owner had already replaced the battery and checked all the fuses. After connecting my scan tool, I found a handful of communication error codes (U-codes) pointing to the BCM. These modules are the central hub for body electronics, and when they start to fail internally, they create these ghost-like problems. Installing a VIN-programmed 2004-2007 Express 2500 BCM solved every single issue in under 10 minutes. It’s a common failure point I’ve seen hundreds of times on these workhorses.
Common Signs of a Failing BCM
If your vehicle is experiencing any of the following, a failing BCM is the likely cause. Don’t let these issues disrupt your workday or compromise your vehicle’s safety.
- ✔ Unresponsive or erratic power windows, door locks, or interior lights.
- ✔ HVAC blower motor or climate controls working intermittently or not at all.
- ✔ The security system acting up, leading to a no-start condition (Passlock issues).
- ✔ An illuminated airbag warning light, often accompanied by Diagnostic Trouble Code (DTC) B1001.
- ✔ Strange battery drain issues that are difficult to trace.
- ✔ Wipers or other accessories activating on their own or not turning off.
A Straightforward Guide to Installation
Replacing the BCM is a simple job that most DIYers can complete with basic tools. For the Express and Savana vans, the module is typically located behind a panel in the center of the dash.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery to prevent electrical shorts.
- Locate the BCM: On Express/Savana vans, it’s usually behind the center dash trim. On pickups and SUVs, it’s often under the driver’s side of the dashboard, near the steering column.
- Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once unplugged, unbolt or unclip the old module and remove it.
- Install the New Module: Mount the new BCM in the same location and securely plug in all the electrical connectors. You’ll hear a click as they lock into place.
- Reconnect and Test: Reconnect the battery terminal. Start the vehicle and test all functions—lights, locks, windows, wipers, and HVAC—to confirm the repair.
Important Post-Installation Notes
While this module is programmed for plug-and-play functionality, some GM vehicles require a security handshake with other modules. If you encounter an airbag light after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system. Additionally, a Brake Pedal Position Relearn might be necessary on some models. And the best part? There is no core charge, so you don’t have to worry about sending the old part back.
Will This Fit My GM Vehicle?
This BCM is a direct replacement for a wide range of GM trucks, vans, and SUVs. It is interchangeable with part numbers 15116066, 15137394, 15198116, 15257043, and many others. Please verify your part number or contact us with your VIN to ensure compatibility.
GMC: Savana 1500/2500/3500 Van (2004-2007), Sierra 1500/2500/3500 & Denali (2003-2007 Classic), Yukon & Yukon XL 1500/2500 (2003-2006)
Cadillac: Escalade, ESV, EXT (2003-2006)
Hummer: H2 (2003-2007)
Frequently Asked Questions
Do I need to take my vehicle to the dealer after installing this BCM?
No. We program the module to your vehicle’s VIN before shipping, so it’s ready for installation right out of the box. This saves you the time and expense of a dealership visit for programming.
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors many of its non-engine-related functions. This includes power windows, locks, lights, wipers, the security system, and the HVAC system.
Is it difficult to replace a 2004-2007 Express 2500 BCM?
No, the replacement is very straightforward. It typically involves removing a dash panel, unplugging a few connectors, swapping the module, and reconnecting everything. Most people can do it in under 15 minutes with basic hand tools.
What happens if my airbag light comes on after installation?
This is a rare but possible occurrence. It means the new BCM needs to be electronically synced with the vehicle’s Sensing and Diagnostic Module (SDM). A professional mechanic with a capable bi-directional scan tool can perform the ‘Setup SDM Primary Key’ procedure to resolve this.
Is there a core charge for this part?
No, we do not require you to return your old, faulty module. There is no core charge associated with this purchase.