Are you dealing with baffling electrical issues in your Chevrolet Sonic? Flickering lights, unresponsive power windows, or random warning messages on your dash are classic signs of a failing Body Control Module (BCM). The BCM is the central nervous system for your vehicle’s comfort and convenience features, and when it malfunctions, it can make your car feel unreliable. This isn’t just an annoyance; it can affect everything from your interior lighting to your security system.
Instead of facing an expensive bill and a long wait at the dealership for a new, unprogrammed module, we offer a streamlined and cost-effective solution. This listing is for a replacement BCM that is professionally programmed using the data from your vehicle’s original module. This cloning process ensures that the replacement unit is a perfect match for your car’s specific configuration, making the installation a true plug-and-play experience. By transferring your original data, we eliminate the need for costly factory scan tools and programming procedures after installation.
A Technician’s Notebook
I recently had a 2014 Chevy Sonic in the bay that was driving the owner crazy. The radio would turn off randomly, the driver’s side window worked intermittently, and the anti-theft light would flash for no reason. We checked all the usual suspects—fuses, relays, and wiring—with no luck. A deep dive with the scan tool showed multiple communication loss codes (U-codes) pointing back to the BCM. Instead of a new dealer part, we used a cloned module. The customer sent us their original BCM, we transferred the data, and sent the replacement back. The install took less than 30 minutes, and every single electrical gremlin was gone. It’s a solid, reliable fix that saves everyone time and money.
Common Signs of a Failing Body Control Module
- ✔️ Erratic or non-functional power windows, door locks, and interior lights.
- ✔️ The security system engages incorrectly, preventing the car from starting.
- ✔️ Horn, wipers, or turn signals activating on their own or not at all.
- ✔️ False warning lights on the instrument cluster (e.g., “Service Airbag”).
- ✔️ Communication-related Diagnostic Trouble Codes (DTCs) such as U0140, U0155, or other U-series codes.
- ✔️ Inconsistent operation of the keyless entry system.
Your Straightforward BCM Installation Guide
Our cloning service makes replacing your 2013-2014 Sonic BCM a simple process. Here’s a general guide:
- Safety First: Always disconnect the negative terminal from your vehicle’s battery before starting any electrical work.
- Locate the BCM: In the 2013-2014 Chevrolet Sonic, the BCM is located behind the trim panel in the right-hand (passenger side) rear quarter panel area.
- Remove Connectors: Carefully press the release tabs on each electrical connector and pull them straight out from the module. Do not force them.
- Unbolt the Module: Remove the mounting bolts or nuts securing the BCM to its bracket and carefully take out the old module.
- Install the New BCM: Mount your pre-programmed replacement BCM in the same location, secure it with the bolts, and reconnect all electrical connectors until they click securely into place.
- Final Steps: Reconnect the negative battery terminal. Start the vehicle to confirm that the electrical issues are resolved.
Important Information After Installation
While our goal is a seamless installation, some GM vehicles require a ‘handshake’ between modules after a BCM is replaced. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light is illuminated after you install the BCM, a professional scan tool is needed to perform the “Setup SDM Primary Key in BCM” procedure. This syncs the airbag system with the new BCM.
- Brake Pedal Position Relearn: On some models, the brake pedal position sensor may need to be recalibrated to ensure the brake lights and stability control systems function correctly.
Disclaimer: These procedures can vary. We always recommend consulting a factory service manual or a qualified technician if you are unsure about any step.
Verified Vehicle Compatibility
This BCM is a direct-fit replacement for part numbers 13586589, 13589093, and 13580689. It is guaranteed to fit the following vehicles:
- 2013-2014 Chevrolet Sonic (BCM located in the RH rear quarter panel)
- 2013 Cadillac ATS (BCM located on the firewall)
- 2013 Cadillac XTS (BCM located in the left front hinge pillar)
- 2014 Chevrolet Impala (BCM located in the LH dash – for VIN 1, 4th digit, New Style)
Frequently Asked Questions
How does the cloning service work?
After you place your order, we will provide you with instructions to ship your original BCM to us. Once we receive it, our technicians will extract the unique vehicle data and program it onto the replacement module. We then ship the ready-to-install BCM back to you.
Do I need to do any programming myself?
No. The main benefit of our service is that the BCM arrives fully programmed for your vehicle. This eliminates the need for expensive dealer-specific tools or programming appointments.
Is this a plug-and-play solution?
Yes, in over 95% of cases, it is. You simply install the module. In rare instances, as noted above, a simple relearn procedure for the airbag or brake pedal sensor may be required, which can be done with a professional scan tool.
How long does the process take?
We typically program and ship your replacement BCM within one business day of receiving your original module. A tracking number will be provided as soon as it ships.
Do I need to send back my old part after installation?
No, there is no core charge for this item. You only need to send us your original BCM for the initial programming service. You can keep it afterward.