Restore Your Van’s Electrical System with a Plug-and-Play Solution
Is your GMC Savana or Chevrolet Express van acting like it’s haunted? Flickering lights, intermittent power windows, a security light that won’t turn off, or a frustrating no-start condition can all point to one culprit: a failing Body Control Module (BCM). As the central hub for your vehicle’s body electronics, a faulty BCM can wreak havoc, turning your reliable workhorse into a source of daily frustration. In my 20+ years as a technician, I’ve seen these modules cause some of the most confusing electrical gremlins, costing owners time and money in diagnostics.
This is your direct-fit, hassle-free solution. We offer a reliable replacement Body Control Module, part number 15948438, that comes professionally programmed to your van’s exact Vehicle Identification Number (VIN) before it ships. This critical step eliminates the need for an expensive trip to the dealership for programming. You get a component that’s ready for installation right out of the box, loaded with the latest GM software updates to ensure peak performance and reliability. Get your van back to being the dependable tool you need it to be.
From the Diagnostic Bay: The Contractor’s Van
A local plumber brought his 2011 Savana 2500 into my shop with a list of bizarre issues. The dome light would stay on, the driver’s power window worked only when it wanted to, and twice that week, the van refused to start, leaving him stranded at a job site. The security light was flashing on the dash. His scan tool showed a bunch of U-codes (communication errors) pointing to the BCM. Instead of sending him to the dealer for a new module and programming, we ordered one of these VIN-programmed units. The installation took less than an hour, and the van fired right up. All the strange electrical problems were gone. He was back on the road the same day, saving him from losing a full day of work.
Is Your GM Vehicle Showing These Symptoms?
A failing BCM can manifest in numerous ways. If you’re experiencing any of the following, a faulty Body Control Module is a likely cause:
- ✔ Erratic or non-functional interior/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 light is illuminated, preventing the engine from starting.
- ✔ Horn sounds unexpectedly or doesn’t work.
- ✔ Dashboard warning lights appearing for no reason.
- ✔ Communication error codes, such as U0140, U0155, or other U-series DTCs.
- ✔ Rapid battery drain while the vehicle is off.
A Straightforward Guide to BCM Installation
For the confident DIYer or professional mechanic, replacing the BCM is a manageable job. On most Savana and Express vans, the BCM is located behind the center dash trim.
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before beginning any electrical work.
- Access the Module: Carefully remove the necessary dash trim panels to gain access to the BCM. It’s typically mounted to a bracket in the center dash area.
- Disconnect and Remove: Unplug the electrical connectors from the old BCM. Note their orientation. Then, unbolt the module from its mounting bracket.
- Install the New BCM: Mount your new, pre-programmed BCM onto the bracket and securely reconnect all electrical connectors. Ensure they click into place.
- Final Steps: Reassemble the dash components and reconnect the negative battery terminal. Start the vehicle to confirm the fix.
Important Post-Installation Information
While this module is programmed for your vehicle, some GM models require a final ‘handshake’ between components. Depending on your specific vehicle, you may need a professional scan tool to perform one of the following relearn procedures:
- Airbag System Sync: If the airbag warning light is on after installation, a ‘Setup SDM Primary Key in BCM’ procedure is needed to sync the systems.
- Brake Pedal Position Relearn: A recalibration might be necessary to ensure proper brake light and traction control operation.
Disclaimer: Procedures can vary. Always consult a factory service manual for your specific vehicle.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15948438 and a wide range of other GM part numbers. It fits an extensive list of vehicles, including but not limited to:
This module replaces the following part numbers: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Frequently Asked Questions
Why do you need my VIN?
Your vehicle’s VIN allows us to program the Body Control Module with the specific software and settings for your exact model, year, and options. This ensures it communicates correctly with other modules in your van, making the installation process as simple as possible.
Is this part difficult to install for a DIYer?
For someone with moderate mechanical experience, it’s a very manageable job. The main challenge is accessing the module behind the dash trim. Since we pre-program the unit, you skip the most complex part of the process.
What happens if my airbag light comes on after installation?
This is a normal possibility on some GM vehicles. It means the new BCM needs to be electronically introduced to the airbag system (SDM). A professional mechanic with a capable scan tool can perform the ‘Setup SDM Primary Key in BCM’ procedure in a few minutes to resolve this.
Will this fix my ‘Service Theft Deterrent System’ message?
In many cases, yes. The BCM is a core part of the Pass-Key/Passlock anti-theft system. A failing BCM is a very common reason for this warning message and the associated no-start condition.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module.