Is Your GM Vehicle Acting Possessed?
Are you dealing with flickering dashboard lights, power windows with a mind of their own, or a security system that randomly prevents your car from starting? These frustrating and often unpredictable electrical gremlins are common signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, managing everything from interior lighting and power locks to the anti-theft system. When it fails, it can cause a cascade of confusing and inconvenient problems.
From the Diagnostic Bay
We had a 2011 Chevy Impala come in that was giving its owner fits. The dome lights would stay on, the radio would shut off intermittently, and sometimes the car just wouldn’t crank, showing a ‘Service Theft System’ message. The owner had already replaced the battery and checked fuses with no luck. After connecting our diagnostic tool, we found multiple communication error codes all pointing to one culprit: the BCM. Instead of a costly trip to the dealer for a new module and programming, we installed a pre-programmed unit just like this one. The car fired right up, all the electrical functions returned to normal, and the customer drove away with a reliable vehicle and significant savings.
The Plug-and-Play Solution: A VIN-Programmed BCM
Don’t let a faulty BCM keep you off the road or force you into an expensive dealership visit. This GM Programmed BCM is the reliable and cost-effective solution you need. We take the hassle out of the repair by programming the module to your vehicle’s specific Vehicle Identification Number (VIN) before it even leaves our facility. This means it arrives at your door ready for installation, loaded with the latest GM software updates to ensure optimal performance and compatibility. No extra trips for programming, no hidden fees.
Common Symptoms of a Failing BCM
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors not working correctly.
- ✔ The security or anti-theft system engaging randomly, causing a no-start condition.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Wipers operating intermittently or getting stuck.
- ✔ False warnings on the instrument cluster (e.g., ‘Door Ajar’).
- ✔ Communication issues with diagnostic scan tools.
Simple Installation Process
Once you receive your GM Programmed BCM, installation is straightforward. Simply locate and disconnect your old module, and connect this new one. While the process is designed to be as simple as possible, some vehicles may require a couple of minor post-installation procedures. For instance, if your airbag light is illuminated after the swap, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a Brake Pedal Position Relearn may be necessary on some models to ensure proper brake light and traction control operation. Always consult a service manual for your specific vehicle for detailed instructions.
This module is a direct replacement for a wide range of part numbers, including: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, and many more. Please check the fitment list to confirm compatibility with your vehicle.
Frequently Asked Questions
What is a BCM and what does it do?
The Body Control Module (BCM) is a computer in your vehicle that controls and monitors the various electronic accessories in the vehicle’s body. This includes power windows, locks, lights, wipers, security systems, and more.
How do I know if my BCM is the problem?
Common signs include multiple, unrelated electrical issues happening at once, such as flickering lights, malfunctioning power accessories, and anti-theft system problems. A diagnostic scan showing communication error codes with the BCM is a strong indicator.
What do you mean by ‘VIN Programmed’?
After you purchase, you provide us with your vehicle’s 17-digit VIN. We then load the correct software and vehicle-specific settings onto the BCM. This ensures it works correctly with your vehicle’s options right out of the box, eliminating the need for dealership programming.
Do I need to send my old BCM back?
No. There is no core charge for this part. You can keep your original module.
What if my airbag light is on after installation?
This can happen on some models. It means the new BCM needs to be synced with the airbag system’s computer (SDM). A ‘Setup SDM Primary Key in BCM’ procedure must be performed with a professional-grade diagnostic tool to resolve this.
Is this part difficult to install?
For many DIY mechanics, the physical swap is straightforward. The BCM is typically located under the dashboard. However, due to potential post-installation relearn procedures, we always recommend consulting a service manual or having a qualified technician perform the work.