Are you chasing down frustrating electrical gremlins in your GM vehicle? One minute the power windows work, the next they don’t. Maybe your dash lights are flickering like a holiday display, or the security system is preventing the car from starting. As a technician with over two decades of experience, I’ve seen these exact issues hundreds of times, and they almost always point to one culprit: a failing Body Control Module (BCM).
The BCM is the central command center for your car’s body electronics. It manages everything from your interior lights and power locks to the anti-theft system and instrument cluster data. When it starts to fail, it can create a cascade of bizarre, seemingly unrelated problems. This isn’t just an annoyance; it can be a major safety and reliability issue.
This listing is for a professionally programmed BCM, a direct replacement for part numbers like 13505326, 13578420, 13577850, and more. We take the guesswork and high dealership costs out of the equation. Our unique cloning service makes this a true plug-and-play solution. Simply send us your original BCM, and we will transfer all the critical vehicle-specific data—including VIN, mileage, and key information—to this replacement unit. When you get it back, you just install it, and you’re ready to go. No expensive trip to the dealer for programming is required.
From the Diagnostic Bay
I remember a 2011 GMC Terrain that came into my shop with a complaint of a randomly dead battery. The owner had already replaced the battery and alternator, but the problem persisted. After connecting my scan tool, I noticed the BCM wasn’t going to ‘sleep’ after the car was turned off, causing a parasitic draw. Instead of a complex and costly rewiring job, we used a cloned BCM. The customer sent us their old module, we transferred the data, and sent the replacement back. The install took them less than 30 minutes, and the parasitic draw was gone. It’s a perfect example of how the right part can save hundreds in diagnostic fees and unnecessary repairs.
Common Signs of a Failing GM BCM
If you’re experiencing any of the following, a faulty BCM could be the cause. In my shop, these are the classic indicators I look for when diagnosing a potential 2011 Regal BCM failure or a similar issue in a Cruze or Terrain.
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Horn honking unexpectedly or not working at all.
- ✔ Dash lights flickering, warning lights staying on (ABS, Airbag, Security), or gauges behaving strangely.
- ✔ The anti-theft or security system engaging randomly, causing a no-start condition.
- ✔ Interior or exterior lights not turning on or off correctly.
- ✔ Communication errors with other modules, often showing codes like U0140 (Lost Communication With Body Control Module).
Your Straightforward BCM Installation Guide
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate the BCM: On most of these models (Regal, SRX, Equinox, Terrain), the BCM is located behind the driver’s side of the dashboard or kick panel. For the Cruze, it’s typically in the driver’s side kick panel area. Consult a service manual for the exact location on your vehicle.
- ✔ Remove the Old Module: Carefully unplug the electrical connectors. Most have a locking tab that needs to be depressed or lifted. Then, unbolt or unclip the module from its mounting bracket.
- ✔ Install the New Module: Seat the replacement BCM into the mounting bracket and securely reconnect all electrical connectors. You should hear a ‘click’ as they lock into place.
- ✔ Reconnect Power: Reattach the negative battery terminal and tighten it securely.
- ✔ Post-Install Checks: Start the vehicle and test all body functions—windows, locks, lights, wipers, etc. Note that some vehicles may require additional relearn procedures as outlined below.
Important Post-Installation Note: While our programming makes this a plug-and-play part, some vehicle systems may require a final handshake. If your airbag light is on, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. Additionally, a Brake Pedal Position Relearn might be necessary on some models to ensure proper brake light and traction control operation. Always consult a factory service manual for your specific vehicle.
Verified Fitment for Your Vehicle
This module is a guaranteed fit for the following vehicles and part numbers. Please match your original part number or vehicle application to ensure compatibility.
- ✔ Part Numbers: 13577850, 13505326, 13500384, 13574844, 13504004, 13504494, 13578420
- ✔ Buick Regal: 2011 (Body Control, LH dash, w/o opt AUA)
- ✔ Cadillac SRX: 2010 (Body Control, LH dash)
- ✔ Chevrolet Cruze: 2011, 2013 (Body Control, LH kick panel)
- ✔ Chevrolet Equinox: 2010 (Body Control, LH side dash)
- ✔ GMC Terrain: 2010, 2011 (Body Control, LH side dash)
Frequently Asked Questions
Frequently Asked Questions
How does this cloning service work?
It’s simple. After you purchase, we will contact you with instructions to ship your original BCM to us. Once we receive it, we transfer all of its essential data to the replacement module. We then ship the ready-to-install BCM back to you. This process ensures seamless integration with your vehicle’s existing systems.
Do I need to get this 2011 Regal BCM programmed by a dealer?
No. The main benefit of our service is that the module arrives at your door fully programmed and ready for installation. This saves you the time, hassle, and expense of a dealership visit for programming.
What if my airbag light comes on after installation?
In some cases, the new BCM needs to be synchronized with the airbag system’s Supplemental Deployment Module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be performed by a professional mechanic with an appropriate diagnostic tool.
Is there a core charge or do I need to return my old part?
There is no core charge for this item. We only need your original module temporarily for the data cloning process. You can keep your original module after the service is complete.