Dealing with bizarre electrical issues in your Cadillac or Chevrolet? One moment the windows work, the next they don’t. Maybe your dash lights are flickering like a disco ball, or the security system is preventing the car from starting. As a technician with over two decades of experience, I’ve seen these frustrating, hard-to-diagnose problems hundreds of time. The culprit is often a failing Body Control Module (BCM)—your car’s central nervous system for all things comfort and convenience.
Replacing a BCM used to mean a mandatory, and expensive, trip to the dealership for programming. We’ve eliminated that step. This is a comprehensive cloning service for your Programmed GM BCM. You simply send us your original module, and we transfer its unique data—including key information and vehicle-specific options—to a fully tested replacement unit. We then ship the ready-to-install module back to you, saving you significant time, money, and hassle.
Is Your Car Experiencing These Glitches?
- ✔ Erratic or non-functional power windows, door locks, or interior/exterior lights.
- ✔ The security or anti-theft system light is on, causing a no-start condition.
- ✔ Intermittent operation of the radio, climate controls, or instrument cluster gauges.
- ✔ False warnings on the driver information center (DIC).
- ✔ Diagnostic Trouble Codes (DTCs) stored in the system, such as U0140 (Lost Communication With Body Control Module).
- ✔ Inconsistent key fob performance or remote start failure.
A Technician’s Notebook
I remember a 2014 Chevy Sonic that came into the shop with a laundry list of complaints from the owner. The radio would randomly shut off, the dome light would stay on, and the key fob worked only half the time. Another mechanic had already replaced the battery and checked the fuses, but the gremlins persisted. After hooking up my diagnostic tool, I saw multiple communication errors pointing towards the BCM. Instead of a costly new module and hours of programming, we performed a cloning service just like this one. The customer had their car back the next day, fully functional, for a fraction of what the dealer quoted. These modules are notorious for causing exactly this kind of chaotic, seemingly unrelated behavior.
A Straightforward Guide to Installation
- ✔ Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- ✔ Locate Your BCM: The module’s location varies by model. For an ATS, it’s on the firewall; for an XTS, it’s in the left front hinge pillar; for a Sonic, it’s in the right rear quarter panel; and for the Impala, it’s on the left-hand side of the dash.
- ✔ Remove the Original: Carefully disconnect the electrical connectors. Most have a locking tab that needs to be pressed or lifted. Then, unbolt the module from its mounting bracket.
- ✔ Install the Replacement: Mount your new, pre-programmed BCM and securely reconnect all electrical connectors. Ensure they click into place.
- ✔ Power Up: Reconnect the negative battery terminal.
- ✔ Final Checks: Start the vehicle and test all functions controlled by the BCM—windows, locks, lights, wipers, and radio—to confirm proper operation.
Important Post-Installation Notes
While our cloning service makes this a near plug-and-play repair, some vehicle systems may require a ‘handshake’ with the new BCM. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the airbag system with the BCM and resolves the light.
- Brake Pedal Position Relearn: On some models, a brake pedal position sensor recalibration might be necessary to ensure the brake lights and traction control system function correctly.
Disclaimer: Specific procedures can vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Compatibility for Your Vehicle
This service is for BCM part number 13580689 and is also a direct replacement for part numbers 13586589 and 13589093. It is guaranteed to fit the following vehicles:
- 2013 Cadillac ATS (Body Control Module located on the firewall)
- 2013 Cadillac XTS (Body Control Module located in the left front hinge pillar)
- 2013-2014 Chevrolet Sonic (Body Control Module located in the RH rear quarter panel)
- 2014 Chevrolet Impala (New Style with VIN 1, Body Control Module located on the LH dash)
Frequently Asked Questions
How does the cloning service work after I purchase?
After you place your order, we will contact you with detailed instructions and a shipping address. You will need to ship your original BCM to us. Once we receive it, we’ll clone the data to the replacement module and ship it back to you, typically within 1-2 business days. We provide tracking for the return shipment.
What if my original BCM is completely dead or not communicating?
In many cases, even if the BCM has failed operationally, we can still extract the necessary data from the memory chip. If your module has severe water or fire damage, please contact us before ordering to discuss options.
Is this a simple plug-and-play installation?
Yes, for over 95% of installations. Because we clone your vehicle’s specific data, you will not need to visit a dealer for programming. In rare cases, as noted above, a post-install procedure like an airbag sync may be required, which needs a professional scan tool.
Do I need to send my keys with the module?
No. Since we are transferring the immobilizer and key data directly from your old BCM, your existing keys will work seamlessly with the replacement module. Do not send your keys.
Is there a core charge?
No, there is no core charge for this service. You can keep your original module after the service is complete.