Restore Full Electrical Function to Your GM Vehicle
Are you battling bizarre electrical problems in your Chevrolet, GMC, Cadillac, or other GM vehicle? Issues like flickering lights, malfunctioning power windows and locks, a faulty security system, or random warning messages on your dash are often symptoms of a failing Body Control Module (BCM). The BCM acts as the central command center for your vehicle’s body electronics, and when it fails, it can create a host of frustrating and unpredictable problems. This replacement Body Control Module, part number 15837419, is the definitive solution to restore your vehicle’s proper operation.
From the Diagnostic Bay
We had a 2008 Chevy Impala come in that was driving the owner crazy. The dome lights would randomly turn on while driving, the radio would shut off, and the security light would flash intermittently, sometimes preventing the car from starting. We checked the battery and grounds, which were fine. After connecting our diagnostic tool, we saw multiple communication loss codes with various systems, all pointing back to one culprit: the BCM. Once we installed a new, properly programmed BCM, all the strange electrical gremlins vanished. The customer was thrilled to have their reliable car back.
Why Choose Our Programmed GM Body Control Module?
Getting your vehicle back on the road shouldn’t be a hassle. That’s why we offer this BCM fully programmed to your specific vehicle. Simply provide us with your Vehicle Identification Number (VIN) after purchase, and our technicians will flash the module with the latest GM software updates for your exact make and model. This means no expensive trips to the dealership for programming—it arrives at your door ready for installation. This is a true plug-and-play solution for a complex problem.
Common Symptoms of a Failing BCM:
- ✔ Erratic or non-functional interior and exterior lights
- ✔ Power windows, door locks, or mirrors working intermittently or not at all
- ✔ Vehicle security system faults or anti-theft light staying on
- ✔ Horn honking unexpectedly or not working when pressed
- ✔ Inaccurate or dead gauges on the instrument cluster
- ✔ Communication errors with diagnostic scan tools
- ✔ Parasitic battery drain causing a dead battery
Installation and Post-Install Considerations
Installation is straightforward for those with mechanical experience, typically involving locating the old module (often under the dash or behind a kick panel), disconnecting the battery, swapping the modules, and reconnecting everything. While our programming handles the critical software matching, some vehicles may require simple relearn procedures after installation.
- Airbag System Sync: In some cases, the airbag (SRS) warning light may illuminate after installation. This simply means the new BCM needs to be synced with the airbag’s SDM module. A professional scan tool is required to perform the “Setup SDM Primary Key in BCM” procedure to clear the light.
- Brake Pedal Position Relearn: To ensure proper brake light and traction control operation, a brake pedal position sensor relearn might be necessary. This is also performed with a compatible diagnostic tool.
Always consult a factory service manual or a qualified technician for vehicle-specific instructions and guidance.
Frequently Asked Questions
What is a Body Control Module (BCM)?
The BCM is a computer in your vehicle that controls and monitors a wide range of electronic accessories not related to the engine, such as 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. Flickering lights, malfunctioning locks, and random warning messages are classic symptoms. A diagnostic scan by a professional technician can confirm the failure.
Why does this BCM need my VIN?
Your vehicle’s VIN allows us to program the BCM with the correct software and settings for your specific options and features. This ensures it communicates correctly with other modules in your car, making installation much simpler.
Is this a difficult part to install?
For a DIYer with some experience, the physical replacement is typically manageable. It’s usually located under the dashboard. The main benefit of our product is that the complex programming is already done for you, eliminating the need for specialized dealer tools.
Do I need to send my old part back?
No. There is no core charge for this part. You can keep your original module.
What other steps might be needed after installation?
Depending on your vehicle, you may need to perform an Airbag System Sync or a Brake Pedal Position Relearn if you see related warning lights. These procedures require a professional-grade scan tool.