Restore Your Van’s Electrical Functions and Reliability
If you’re dealing with bizarre electrical issues in your 2003-2007 Chevy Express or GMC Savana van, you’re not alone. Flickering interior lights, power locks with a mind of their own, or a security light that won’t turn off are classic signs of a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can cause a cascade of frustrating and unpredictable problems. This replacement BCM is the definitive solution, arriving pre-programmed to your van’s specific Vehicle Identification Number (VIN) for a straightforward installation.
Is Your Van Showing These Symptoms?
- ✔ Erratic power window or door lock operation.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security system light is on, or the vehicle won’t start due to a false security alert.
- ✔ Dashboard warning lights illuminating without a clear cause.
- ✔ Intermittent issues with the radio or climate controls.
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as B1001, B1327, or U-series communication codes.
From the Diagnostic Bay
I remember a fleet customer bringing in his 2006 Express 1500 work van. The complaint was ‘it’s possessed.’ The dome lights would randomly turn on while driving, and the power locks would cycle on their own overnight, draining the battery. We couldn’t find any wiring shorts. After connecting the scan tool, I saw multiple communication loss codes with various modules. Experience pointed directly to the BCM. We installed a VIN-programmed module just like this one, and the van was back to being a reliable workhorse the same day. It’s a common failure point I’ve diagnosed hundreds of times on these GM platforms.
A Straightforward Guide to Installation
Installing your new 2003-2007 Express 1500 BCM is a manageable job for a confident DIYer. In these vans, the BCM is typically located in the center of the dashboard.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait 10-15 minutes before beginning.
- Access the Module: Carefully remove the necessary dash trim panels to gain access to the BCM. It’s usually a black box with several large electrical connectors.
- Disconnect and Remove: Unplug all electrical connectors from the old BCM. They have release tabs that need to be pressed. Once disconnected, unbolt the module from its mounting bracket.
- Install the New BCM: Mount the new, pre-programmed BCM in place and securely reconnect all electrical connectors. Ensure they click into place.
- Reconnect and Test: Reconnect the negative battery terminal. Turn the key to the ‘ON’ position (without starting) and test all body functions: lights, locks, windows, radio, etc.
Important Post-Installation Steps
Because this module communicates with other critical systems, a couple of relearn procedures may be necessary after installation:
- Airbag System Sync: If the airbag warning light is illuminated 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 module.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor relearn may be required to ensure correct brake light and traction control operation.
Disclaimer: Vehicle systems vary. Always consult a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15116065 and other interchangeable numbers. It is guaranteed to fit the following vehicles (please check the specific options listed in the original fitment chart):
- Chevrolet Express 1500/2500/3500 Vans (2003-2007)
- GMC Savana 1500/2500/3500 Vans (2003-2007)
- Chevrolet Silverado 1500/2500/3500 Pickups (2003-2007 Classic)
- GMC Sierra 1500/2500/3500 Pickups (2003-2007 Classic)
- Chevrolet SSR (2003-2006)
This unit replaces part numbers: 15167329, 15194169, 15747545, 15136224, 15116065, 15198115, 15136876, 10367689.
Frequently Asked Questions
Do I need to send you my old BCM?
No. This purchase requires absolutely no core charge or return. You can keep your original part.
How do I provide my VIN for programming?
After you complete your purchase, you will receive instructions on how to send us your vehicle’s 17-digit VIN. We cannot ship the module until we receive this information, as the programming is essential.
Is this a plug-and-play installation?
Yes, for the most part. Because we program it to your VIN, it will control the basic functions right out of the box. However, as noted, you may need a scan tool for specific procedures like the airbag system sync if that warning light appears.
Will this fix my ‘Service Security System’ message?
A failing BCM is one of the most common causes of false security system alerts on these GM vehicles. While other issues can cause it, replacing a faulty BCM very often resolves this problem.
What tools are required for the job?
Basic hand tools like a socket set and trim removal tools are usually all that’s needed for the physical replacement. For potential post-installation relearn procedures, a bi-directional professional scan tool would be required.