Restore Your Vehicle’s Electrical Stability and Functionality
Are you chasing down frustrating electrical gremlins in your GM vehicle? Flickering lights, intermittent power windows or door locks, a battery that dies for no reason, or a dash lit up with warning lights can all point to a single culprit: a failing Body Control Module (BCM). As the central command center for your vehicle’s body electronics, the BCM’s health is critical for everyday operation. When it starts to fail, it can create a cascade of confusing and unpredictable problems. This isn’t just an inconvenience; it can affect vehicle security and safety systems.
This replacement GM Body Control Module is the definitive solution to restore your vehicle’s proper function. We take the guesswork and high costs out of the repair process. Unlike a trip to the dealership, which involves expensive diagnostic fees and programming charges, our service is straightforward. Simply provide your vehicle’s VIN at checkout, and our expert technicians will program the module with the latest GM software updates specific to your car, truck, or van. It arrives at your door ready for installation, saving you significant time and money.
A Technician’s Notebook: The Case of the Haunted Impala
A 2011 Impala came into my bay with a classic BCM failure story. The owner complained of the radio turning on and off by itself and the security light staying on, preventing the car from starting intermittently. They had already replaced the battery and checked the alternator. After plugging in my scanner, I saw multiple communication loss codes (U-codes) pointing to the BCM. Instead of a complex rewiring job, the fix was a new, correctly programmed GM Body Control Module. Once installed, all the phantom electrical issues vanished. This is a perfect example of how a single component can cause widespread, confusing symptoms.
Is Your Vehicle Showing These Symptoms?
- ✔ Power windows, mirrors, or door locks operating erratically or not at all.
- ✔ Interior or exterior lights flickering, staying on, or not working.
- ✔ The anti-theft or security system engaging randomly, causing no-start conditions.
- ✔ Unexplained battery drain that leaves you stranded.
- ✔ Warning lights on the dashboard, such as the airbag or ABS indicators.
- ✔ Communication error codes (DTCs like U0140, B1001) stored in the system.
- ✔ Wipers or climate control functions behaving unpredictably.
A Straightforward Guide to Your BCM Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery and wait about 10 minutes to allow all systems to power down completely.
- ✔ Locate the BCM: The location varies by model (see fitment list below). It’s typically found under the driver’s side dash, behind the glove box, or in the center console area.
- ✔ Disconnect and Remove: Carefully unplug the electrical connectors. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the old module from its mounting bracket.
- ✔ Install the New Module: Mount your new, pre-programmed BCM in the exact same position as the old one. Securely plug in all the electrical connectors, ensuring they click into place.
- ✔ Reconnect Power: Re-attach the negative battery terminal and tighten it securely.
- ✔ Perform Final Checks: Start the vehicle and test all body functions—lights, locks, windows, radio, etc. Note that some models may require the additional procedures outlined below.
Important Post-Installation Information
Your new BCM comes programmed and ready to go, but due to the complexity of modern vehicle systems, a couple of additional steps may be needed depending on your specific model:
- Airbag System Sync: If your airbag warning light is illuminated after installation, a ‘Setup SDM Primary Key in BCM’ procedure must be performed with a compatible high-level scan tool. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: On some vehicles, a brake pedal position sensor relearn is necessary to ensure correct operation of the brake lights and traction control system.
We are committed to a hassle-free experience. That’s why there is no core charge for this part. You can keep your old module without any extra fees.
Verified Vehicle Compatibility
This module is a direct replacement for part number 15837419 and many others. It fits a wide array of GM vehicles. Please confirm your model and year below. Part numbers this module replaces include: 10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084.
Disclaimer: Please verify the location and specific ID number for your vehicle where noted in the original fitment data. This list is comprehensive but always double-check your application.
Frequently Asked Questions
Frequently Asked Questions
GM Body Control Module
How do I know if my BCM is actually bad?
Common signs include multiple, unrelated electrical issues like failing power locks, erratic lights, and random security system alerts. A professional diagnosis with a scan tool checking for communication codes (like U0140) with the is the most definitive way to confirm failure.