Are you battling bizarre electrical issues in your GM vehicle? Flickering lights, malfunctioning power windows, a security system that has a mind of its own, or an unexplained battery drain can often be traced back to a single culprit: a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it starts to fail, it can create a cascade of frustrating and difficult-to-diagnose problems. This replacement BCM, part number 15872388, is the definitive solution to restore your vehicle’s electronic systems to perfect working order.
We take the guesswork and hassle out of the repair process. Unlike a generic module from a dealership or parts store, this unit arrives at your door pre-programmed to your vehicle’s specific Vehicle Identification Number (VIN). Simply provide us with your VIN after purchase, and our technicians will flash the module with the latest, most stable software updates from GM. This ensures seamless integration with your vehicle’s existing systems and eliminates the need for an expensive trip to the dealer for programming.
From the Diagnostic Bay
We had a 2008 Chevy Impala come in with a classic ‘haunted car’ complaint. The dome lights would flicker, the radio would randomly turn off, and the battery would be dead every few mornings. The owner had already replaced the battery and alternator twice. After a quick diagnostic scan, we saw multiple communication errors pointing to the BCM. Instead of just replacing it, we installed one of our VIN-programmed modules. The electrical gremlins vanished instantly. It wasn’t a power or ground issue; it was the brain itself that was malfunctioning. This highlights how a faulty GM Body Control Module can mimic other, more common failures.
Common Symptoms of a Failing GM BCM
- ✔ Intermittent or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not working at all.
- ✔ The security or anti-theft system activating randomly or preventing the engine from starting.
- ✔ A persistent parasitic battery drain that kills the battery overnight.
- ✔ The horn honking unexpectedly or failing to work when pressed.
- ✔ Inaccurate or erratic gauge readings on the instrument cluster.
- ✔ “Service Airbag” or other warning messages appearing on the dash.
Why Choose Our Programmed GM Body Control Module?
This isn’t just a replacement part; it’s a complete, ready-to-install solution. By matching the software to your VIN, we ensure that all the specific options and features your vehicle was built with are correctly recognized and controlled. This module is a direct replacement for a wide range of original part numbers, including 10382479, 15819552, 20815898, 22860591, and many more, covering dozens of Chevrolet, GMC, Buick, Cadillac, Pontiac, and Saturn models. Plus, with our no-core-charge policy, you can keep your old part without any extra fees or hassle.
Post-Installation Information
Installation is straightforward for most models. However, depending on your specific vehicle, a couple of simple relearn procedures may be necessary after the new BCM is installed. If the airbag warning light is illuminated, a technician will need to perform a ‘Setup SDM Primary Key in BCM’ procedure with a professional scan tool. Additionally, some vehicles may require a ‘Brake Pedal Position Relearn’ to ensure proper brake light and traction control function. These are standard procedures that any qualified shop can perform quickly.
Frequently Asked Questions
What does a Body Control Module do?
The BCM acts as the main computer for your vehicle’s comfort and convenience features. It controls functions like power windows, locks, interior/exterior lighting, the security system, wipers, and more.
Is this BCM ready to install when I receive it?
Yes! It comes fully programmed to your vehicle’s VIN. You must provide your VIN at checkout or by contacting us after your purchase. This makes the installation process much simpler than buying a blank module.
Do I need to return my old BCM?
No, there is no core charge for this part. You can keep your original module without any additional cost or need to return it.
Will this fix my ‘Service Airbag’ light?
A faulty BCM can cause a false airbag light. After installing this new module, if the light remains on, a simple ‘Setup SDM Primary Key in BCM’ procedure with a diagnostic tool will be required to sync the systems and turn off the light.
How do I know this part will fit my vehicle?
Please review the extensive fitment list on this page. This module replaces numerous original part numbers and fits a wide variety of GM cars, trucks, and SUVs. Matching your original part number to our list is the best way to confirm compatibility.