Solve Frustrating Electrical Issues in Your GM Vehicle
If your Buick Regal, Chevy Camaro, or GMC Terrain is suffering from bizarre electrical problems—like flickering dashboard lights, power windows with a mind of their own, or a security system that randomly engages—the root cause is often a failing Body Control Module (BCM). As the central nervous system for your vehicle’s comfort and convenience features, a faulty BCM can create a cascade of frustrating and hard-to-diagnose symptoms. This isn’t just an annoyance; it can affect vehicle security and safety systems.
Instead of facing a costly trip to the dealership for a new module and expensive programming fees, we offer a smarter, more efficient solution. This listing is for a replacement BCM, compatible with part numbers including 13580696, 123589093, 13588446, 13584692, and 13583542. We simplify the entire process through our professional cloning service. You send us your original BCM, we transfer all the critical vehicle-specific data to this replacement unit, and ship it back to you ready for installation. It arrives as a true plug-and-play part, restoring full functionality without any additional programming required.
From the Diagnostic Bay: The Case of the Confused Camaro
A customer brought in a 2013 Camaro with a laundry list of complaints: the radio would turn off randomly, the driver’s side window wouldn’t drop for the door to close properly, and the key fob worked intermittently. They had already replaced the battery and checked fuses with no luck. After connecting my scan tool, I saw multiple ‘U’ codes, specifically a U0140 (Lost Communication With Body Control Module). This pointed directly to the BCM. Instead of a multi-day wait and a $1000+ bill from the dealer, we used our cloning service. We had the customer’s original BCM cloned to a replacement unit, and once installed, every single electrical gremlin was gone. The car was back to normal in a fraction of the time and cost.
Is Your GM Vehicle Showing These BCM Failure Signs?
A failing BCM can manifest in numerous ways. If you’re noticing any of the following, your BCM is the likely culprit. This is especially true if you see communication-related Diagnostic Trouble Codes (DTCs).
- ✔ Erratic or non-functional power windows, door locks, or mirrors.
- ✔ Interior or exterior lights flickering, staying on, or not turning on at all.
- ✔ The security system or alarm engaging without reason, or a persistent security light on the dash.
- ✔ Horn honking unexpectedly.
- ✔ Key fob not responding or working intermittently.
- ✔ Wipers activating on their own or not working when commanded.
- ✔ Common communication DTCs like U0140, U0155, or other U-series codes indicating a module is not communicating.
Your Straightforward BCM Installation Guide
Installing your pre-programmed 2012 Regal BCM is a manageable task for a DIYer. The location varies by model (e.g., under the dash, in the kick panel), so always verify the location for your specific vehicle. Here is a general guide:
- Safety First: Disconnect the negative terminal from your vehicle’s battery to prevent any electrical shorts. Wait a few minutes for the system capacitors to discharge.
- Locate the BCM: Find the Body Control Module. In many GM vehicles like the Regal or LaCrosse, it’s behind the driver’s side kick panel or under the left side of the dashboard.
- Disconnect and Remove: Carefully unplug all electrical connectors from the old BCM. They have locking tabs that need to be depressed. Once disconnected, unbolt or unclip the module from its mounting bracket.
- Install the New Module: Mount the replacement BCM in the same position and securely reconnect all the electrical connectors. You should hear a ‘click’ as they lock into place.
- Reconnect Power: Reconnect the negative battery terminal and tighten it securely.
- Test Functionality: Start the vehicle and test all the body functions: windows, locks, lights, wipers, and radio to ensure everything is working as expected.
Important Post-Installation Note: In some cases, additional vehicle-specific relearn procedures may be needed. For example, if your airbag light is on, an ‘SDM Primary Key Setup’ may be required using a professional scan tool. A ‘Brake Pedal Position Relearn’ might also be necessary. Always consult a service manual for your specific model if you encounter any issues.
Verified Compatibility for Your Vehicle
This BCM programming service is guaranteed to work for the following vehicles, provided the part number on your original module is listed. Please match your part number to ensure compatibility.
- Buick LaCrosse: 2012-2013 (LH kick panel)
- Buick Regal: 2012 (LH dash)
- Buick Verano: 2012 (below center of dash)
- Cadillac SRX: 2012 (LH dash)
- Chevrolet Camaro: 2012-2014 (RH dash)
- Chevrolet Equinox: 2012 (LH side dash)
- Chevrolet Spark: 2013 (left lower a-pillar)
- Chevrolet Volt: 2012 (RH engine compartment)
- GMC Terrain: 2012 (LH side dash)
This service is for part numbers: 13580696, 123589093, 13588446, 13584692, 13583542.
Frequently Asked Questions
How does the cloning service work?
After you purchase, we will provide you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the unique programming and security data and flash it onto the replacement module. We then ship the fully programmed, plug-and-play module back to you.
Do I need to get this programmed by a dealer after I receive it?
No. The module you receive from us is pre-programmed with your car’s exact data. This means you can install it yourself without needing any expensive dealer tools or software. It’s designed to be a plug-and-play solution.
Is there a core charge or do I need to return my old BCM?
There is no core charge for this item. We only need your original module temporarily to perform the data cloning service. You can keep your original module after the service is complete.
What happens if my airbag light comes on after installation?
This is uncommon, but if it happens, it means the new BCM needs to be synced with the airbag system’s Sensing and Diagnostic Module (SDM). This requires a ‘Setup SDM Primary Key in BCM’ procedure, which can be done by a professional mechanic with a capable diagnostic tool.
How long does the entire process take?
We typically program and ship your replacement BCM within 1-2 business days of receiving your original module. The total time will depend on shipping times to and from our facility. We will send you a tracking number as soon as it ships.