Restore Your Van’s Electrical System with a Reliable, Pre-Programmed BCM
If you’re dealing with bizarre electrical issues in your workhorse Savana or Express van, you’re not alone. Flickering lights, malfunctioning power locks, a security system that acts up, or an instrument cluster that seems to have a mind of its own are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can turn a dependable van into a frustrating and unreliable liability. This is a problem I’ve seen countless times in my 20+ years of diagnostics; a simple internal failure in the BCM can create a cascade of confusing symptoms.
This isn’t just a replacement part; it’s a complete solution. We take the guesswork and dealership hassle out of the equation. Each 2003-2007 Savana 2500 BCM is professionally flashed with the latest GM software updates, specifically programmed to your van’s unique Vehicle Identification Number (VIN). This ensures seamless communication between modules and restores the factory-intended functionality of your vehicle’s features. Forget about expensive towing fees or scheduling appointments for programming—this module arrives ready for installation.
A Technician’s Notebook
I remember a 2006 Savana 2500 that came into the shop with a complaint of a parasitic battery drain the owner couldn’t track down. Every morning, the battery was dead. He’d already replaced the battery and alternator. After checking the basics, I started pulling fuses and noticed a significant draw related to the interior lighting circuit. The culprit? A faulty BCM that was keeping the retained accessory power relay energized long after the key was off. Swapping in a properly programmed BCM didn’t just fix the battery drain; it also resolved an intermittent issue he had with his power windows. It’s a perfect example of how one failing module can cause multiple, seemingly unrelated problems.
Common Signs of a Failing BCM
A failing BCM can be tricky to diagnose, as its symptoms can mimic other problems. If your van is experiencing any of the following, your BCM is a likely suspect:
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors working intermittently or not at all.
- ✔ The anti-theft or security system preventing the van from starting (Passlock issues).
- ✔ Horn sounding unexpectedly or not working when pressed.
- ✔ Instrument panel gauges behaving erratically or going dead.
- ✔ Communication error codes, such as U0140, stored in other modules.
A Straightforward Guide to Installation
For the Savana and Express vans, the BCM is relatively accessible, making this a job most DIYers can handle with basic tools. Follow these general steps for a smooth installation.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait a few minutes to ensure all systems are powered down.
- Locate the BCM: In most 2003-2007 Savana and Express vans, the BCM is located in the center of the dashboard, often behind a lower access panel or the glove box.
- Remove Connectors: Carefully unplug the electrical connectors from the old BCM. They have locking tabs that need to be depressed. Take note of their orientation.
- Swap the Module: Unbolt or unclip the old BCM from its mounting bracket and set it aside. Mount your new, pre-programmed module in its place.
- Reconnect Everything: Plug the electrical connectors firmly into the new BCM. You should hear or feel a click as they lock into place.
- Power Up: Reconnect the negative battery terminal. Turn the key to the ‘On’ position and test all body functions—lights, locks, windows, etc.
Important Post-Installation Note: In some cases, additional steps may be required. If your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. A ‘Brake Pedal Position Relearn’ might also be necessary. These are standard procedures for this type of repair. And remember, there’s no core charge, so you can keep your old part.
Will This Fit My GM Truck or Van?
This BCM is a direct replacement for a wide range of GM vehicles and is compatible with multiple part numbers, ensuring you get the right component. Please verify your vehicle is on the list below. This module replaces part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, and 10367689.
- Chevrolet Express 1500/2500/3500 Van (2003-2007)
- GMC Savana 1500/2500/3500 Van (2003-2007)
- Chevrolet Silverado 1500/2500/3500 Pickup (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 Pickup (2003-2007 Classic)
- Chevrolet SSR (2003-2006)
Note: For trucks, fitment is typically for models under the steering column, excluding Crew Cab. For vans, it’s in the center dash, excluding the commercial tradesman package on some years. Please see the detailed fitment data in the original listing for specific options.
Frequently Asked Questions
What exactly does the Body Control Module do?
The BCM is a computer that acts as the central command for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, interior/exterior lighting, the security system, wipers, and the horn.
How do I provide my VIN for programming?
After you complete your purchase, you will need to send us your 17-digit VIN. You can typically add it as a note during checkout or send it to us in a message referencing your order number. We cannot ship the BCM until we have your VIN.
Is this BCM truly plug-and-play?
Yes, for most functions. Because we program it to your VIN, it eliminates the need for expensive dealership programming. However, as noted, some vehicles may require an additional ‘relearn’ procedure for the airbag or brake pedal position sensor using a pro-level scan tool if a related warning light appears.
Do I need to return my old BCM?
No. There is no core charge for this part. You can keep your original module.
Will this fix my ‘Service Security System’ message?
In many cases, yes. The BCM is integral to the GM Passlock anti-theft system. A failing BCM is a very common cause of security-related warnings and no-start conditions on these vehicles.
What if I install it and my airbag light comes on?
This indicates the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). A repair shop with a capable bidirectional scan tool will need to perform the ‘Setup SDM Primary Key in BCM’ procedure to resolve this.